Plan
Comptes Rendus
no. 6-7

Tetra(n-butyl)ammonium salt of a ferrimagnetic complex based on mixed-valent dinuclear ruthenium pivalate and octacyanidotungstate(V)
Masahiro Mikuriya1  ; Daisuke Yoshioka1 ; Dominique Luneau2 ; Shun Kawauchi1 ; Dariusz Matoga3 ; Janusz Szklarzewicz3 ; Makoto Handa4
1 Department of Applied Chemistry for Environment and Research Center for Coordination Molecule-Based Devices, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda 669-1337, Japan
2 Univ Lyon, Université Claude-Bernard-Lyon-1, CNRS, Laboratoire des multimatériaux et interfaces, 69622 Villeurbanne, France
3 Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
4 Department of Chemistry, Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan
Comptes Rendus. Chimie, Volume 22 (2019) no. 6-7, pp. 476-482.

Résumé

A tetra (n-butyl)ammonium (n-Bu4N+) salt of Ru2–W complex consisting of dinuclear ruthenium (II,III) pivalate, ([RuIIRuIII(piv)4]+) (Hpiv = pivalic acid), and octacyanidotungstate(V), [n-Bu4N][{RuIIRuIII(piv)4}2(H2O){WV(CN)8}] (1), was synthesized and characterized by elemental analysis, infrared spectra, and temperature dependence of magnetic susceptibilities (2–300 K). The crystal structure of 1 revealed a zigzag one-dimensional chain molecule along the c axis with alternating arrangement of [RuIIRuIII(piv)4]+ and [WV(CN)8]3−, where another [RuIIRuIII(piv)4]+ unit is dangled from the [WV(CN)8]3− moiety. The magnetic susceptibilities and zero-field-cooled and field-cooled magnetization data showed that the present complex is ferrimagnetic with a Tc value of 5.5 K. The field dependence of magnetization exhibited a hysteresis with a coercive field of 150 Oe at 2 K.

Métadonnées
Reçu le :
Accepté le :
Publié le :
DOI : 10.1016/j.crci.2019.04.001
Mots clés : Ruthenium, Tungsten, Carboxylate, Cyanide, Crystal structure, Magnetic properties, Heterometallic compounds

Masahiro Mikuriya 1 ; Daisuke Yoshioka 1 ; Dominique Luneau 2 ; Shun Kawauchi 1 ; Dariusz Matoga 3 ; Janusz Szklarzewicz 3 ; Makoto Handa 4

1 Department of Applied Chemistry for Environment and Research Center for Coordination Molecule-Based Devices, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda 669-1337, Japan
2 Univ Lyon, Université Claude-Bernard-Lyon-1, CNRS, Laboratoire des multimatériaux et interfaces, 69622 Villeurbanne, France
3 Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
4 Department of Chemistry, Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan 
@article{CRCHIM_2019__22_6-7_476_0,
     author = {Masahiro Mikuriya and Daisuke Yoshioka and Dominique Luneau and Shun Kawauchi and Dariusz Matoga and Janusz Szklarzewicz and Makoto Handa},
     title = {Tetra(\protect\emph{n}-butyl)ammonium salt of a ferrimagnetic complex based on mixed-valent dinuclear ruthenium pivalate and {octacyanidotungstate(V)}},
     journal = {Comptes Rendus. Chimie},
     pages = {476--482},
     publisher = {Elsevier},
     volume = {22},
     number = {6-7},
     year = {2019},
     doi = {10.1016/j.crci.2019.04.001},
     language = {en},
}
TY  - JOUR
AU  - Masahiro Mikuriya
AU  - Daisuke Yoshioka
AU  - Dominique Luneau
AU  - Shun Kawauchi
AU  - Dariusz Matoga
AU  - Janusz Szklarzewicz
AU  - Makoto Handa
TI  - Tetra(n-butyl)ammonium salt of a ferrimagnetic complex based on mixed-valent dinuclear ruthenium pivalate and octacyanidotungstate(V)
JO  - Comptes Rendus. Chimie
PY  - 2019
SP  - 476
EP  - 482
VL  - 22
IS  - 6-7
PB  - Elsevier
DO  - 10.1016/j.crci.2019.04.001
LA  - en
ID  - CRCHIM_2019__22_6-7_476_0
ER  - 
%0 Journal Article
%A Masahiro Mikuriya
%A Daisuke Yoshioka
%A Dominique Luneau
%A Shun Kawauchi
%A Dariusz Matoga
%A Janusz Szklarzewicz
%A Makoto Handa
%T Tetra(n-butyl)ammonium salt of a ferrimagnetic complex based on mixed-valent dinuclear ruthenium pivalate and octacyanidotungstate(V)
%J Comptes Rendus. Chimie
%D 2019
%P 476-482
%V 22
%N 6-7
%I Elsevier
%R 10.1016/j.crci.2019.04.001
%G en
%F CRCHIM_2019__22_6-7_476_0
Masahiro Mikuriya; Daisuke Yoshioka; Dominique Luneau; Shun Kawauchi; Dariusz Matoga; Janusz Szklarzewicz; Makoto Handa. Tetra(n-butyl)ammonium salt of a ferrimagnetic complex based on mixed-valent dinuclear ruthenium pivalate and octacyanidotungstate(V). Comptes Rendus. Chimie, Volume 22 (2019) no. 6-7, pp. 476-482. doi : 10.1016/j.crci.2019.04.001. https://comptes-rendus.academie-sciences.fr/chimie/articles/10.1016/j.crci.2019.04.001/

Version originale du texte intégral

1 Introduction

Dinuclear metal carboxylates with lantern-type or paddle-wheel–type core have a long history with copper acetate and a new aspect with ruthenium carboxylates, attracting much attention of many chemists for the past six decades because of their dinuclear core made-up by four carboxylato-bridges with metal–metal interaction or metal–metal bonding [1,2]. In case of dinuclear ruthenium carboxylates, mixed-valent RuIIRuIII state is more stable and gives rise to paramagnetic property with a 3/2 spin system [1,3–5]. We have brought this 3/2 spin system into focus as a spin source for molecular magnetic materials [5–18,24–31]. To develop these magnetic materials, we and Miller et al. introduced cyanidometalate linking ligands into dinuclear ruthenium carboxylates and obtained mixed-metal complexes of dinuclear ruthenium(II,III) carboxylates with dicyanidoargentate(I) (Ag(CN)2−) [27], tetracyanidonickelate(II) (Ni(CN)42−) [23,26], tetracyanidoplatinate(II) (Pt(CN)42−) [28,29], and hexacyanidocobaltate(III) (Co(CN)63−) [17,19–22]. These mixed-metal compounds have paramagnetic properties with a weak antiferromagnetic interaction between 3/2 spins of dinuclear ruthenium units through the diamagnetic cyanidometalate groups. On the other hand, mixed-metal compounds with hexacyanidoferrate(III) (Fe(CN)63−) [17,19–22], hexacyanidochromate(III) (Cr(CN)63−) [19–22], and octacyanidotungstate(V) (W(CN)83−) have a considerable magnetic interaction between the RuIIRuIII S = 3/2 spins and cyanidometalate S = 1/2 spin, resulting in a ferrimagnetic interaction [24,25,30]. Specifically, mixed-metal compound [{RuIIRuIII(piv)4}3(H2O){WV(CN)8}] of ruthenium pivalate [RuIIRuIII(piv)4]+ (Hpiv = pivalic acid) with octacyanidotungstate [WV(CN)8]3− showed a high Tc value of 44 K, whereas an analogous mixed-metal compound [PPh4]2 [{RuIIRuIII(piv)4}{WV(CN)8}] with octacyanidotungstate and tetraphenylphosphonium ion did not show a ferrimagnetic behavior [25]. This observation suggests that the presence of cation, here, tetraphenylphosphonium, may be a clue to obtaining a new phenomenon in our systems. Thus, we introduced a different cation, tetraethylammonium, to ruthenium pivalate and obtained the mixed-metal compound [Et4N][{RuIIRuIII(piv)4}2{WV(CN)8}] [30]. Intriguingly, this compound showed a ferrimagnetic interaction with a high Tc of 80 K. However, it was very difficult to obtain single crystals for this compound to determine the crystal structure by X-ray crystallography, and we could not reveal the molecular structure of this interesting compound. In this study, we synthesized new mixed-metal complex of ruthenium(II)–ruthenium(III) pivalate and octacyanidotungstate(V) by using tetra (n-butyl)ammonium [n-Bu4N]+ ion as a cation in the hope of obtaining single crystals suitable for X-ray crystallography. The isolated mixed-metal compound [n-Bu4N][{RuIIRuIII(piv)4}2(H2O){WV(CN)8}] (1) was characterized by using elemental analysis, infrared and UV–vis spectroscopies, and temperature dependence of magnetic susceptibilities (Fig. 1). The crystal structure of 1·H2O was determined by the single-crystal X-ray diffraction method.

Fig. 1

Chemical structures of [n-Bu4N]+, [RuIIRuIII(piv)4]+ (two kinds of units), and [WV(CN)8]3−.

2 Results and discussion

Analytical C, H, and N data of the isolated complex are in agreement with the 1:2:1 of [n-Bu4N]+:[RuIIRuIII(piv)4]+:[W(CN)8]3– formulation with [n-Bu4N][{RuIIRuIII(piv)4}2(H2O){WV(CN)8}] (1) like the case of [Et4N][{RuIIRuIII(piv)4}2{WV(CN)8}] [30]. IR data showed a strong ν(CN) band of WV(CN)83− moiety at 2145 cm−1 and two COO stretching bands at 1488 and 1420 cm−1 with the difference in energy characteristic of syn–syn bridging carboxylate [32].

As shown in Fig. 2, the diffuse reflectance spectrum of 1 showed a broad band at 1120 nm in the near-infrared region. The broad band can be assigned to the δ (Ru2) → δ*(Ru2) transition band [3–5] and showed a red shift as compared with that of [Ru2(piv)4(H2O)2]BF4 (990 nm), suggesting the axial coordination of the cyanido group of W(CN)83− moiety [12].

Fig. 2

Diffused reflectance spectra of 1.

Single-crystal X-ray structure analysis was performed for 1·H2O. The crystallographic asymmetric unit contains one [n-Bu4N]+ cation, one [{RuIIRuIII(piv)4}2(H2O){WV(CN)8}]− anion, and one water molecule. The ORTEP (Oak Ridge thermal-ellipsoid plot program) drawing of the [{RuIIRuIII(piv)4}2(H2O){WV(CN)8}]− anion is shown in Fig. 3. The coordination number of each ruthenium atom is 6, including the metal–metal bond, and the coordination geometry is an axially elongated octahedron. The RuRu [2.287(8)–2.300(10) Å] and Ru–O (carboxylato) [2.014(7)–2.056(7) Å], and Ru–N [2.275(10)–2.286(11) Å] distances are within the normal ranges as the mixed-valent dinuclear RuIIRuIII carboxylates [5,25]. On the other hand, the coordination number of the tungstate atom is 8 and the coordination geometry can be regarded as a distorted bicapped trigonal prism based on the polytopal analysis (δ1 = 16.4°, δ2 = 5.9°, δ3 = 51.7°, δ4 = 49.9°, ϕ1 = 24.4°, ϕ2 = 19.1°) [25]. The W–C bond distances [2.173(9)–2.193(10) Å] are comparable to those of μ3-[WV(CN)8]3− [25]. In the [{RuIIRuIII(piv)4}2(H2O){WV(CN)8}]− anion, one crystallographically independent [WV(CN)8]3− is bound to two [RuIIRuIII(piv)4]+ units (Ru1–Ru1i and Ru2–Ru2ii), which have a crystallographical inversion center of symmetry and one crystallographically independent [RuIIRuIII(piv)4]+ unit (Ru3–Ru4). Of the three [RuIIRuIII(piv)4]+ units, two [RuIIRuIII(piv)4]+ (Ru1–Ru1i and Ru2–Ru2ii) units are further connected by another [WV(CN)8]3− to form a zigzag one-dimensional (1D) chain along the c axis with alternating arrangement of [RuIIRuIII(piv)4]+ cation and [WV(CN)8]3− anion, where the third [RuIIRuIII(piv)4]+ (Ru3–Ru4) unit is attached to the [WV(CN)8]3− ion. One of the axial position of the third [RuIIRuIII(piv)4]+ unit is occupied by a water molecule (O17), which acts as a terminal ligand with the Ru4–O17 distance of 2.272 (9) Å. This coordinated water molecule is hydrogen bonded with the crystal water molecule (O17–H⋯O18) and the coordinated CN group (O17–H⋯N7iii) (Table 3). The water molecule for O17 is an aqua ligand, whereas the water molecule of O18 is a water molecule of crystallization. The crystal water molecule is also hydrogen-bonded to the coordinated CN nitrogen atom (O18–H⋯N6iii). If the hydrogen bonds between the O17 and N7iii atoms are included, the chain molecules are connected to form a 2D supramolecular sheet constructed by 32-membered rings [–CN–Ru2–NC–W–CN–Ru2–OH–NC–W–CN–Ru2–NC–W–CN–Ru2–OH–NC–W–], as shown in Fig. 4. In the crystal, the tetra (n-butyl)ammonium ions, [n-Bu4N]+, enter the interstice, separating the two-dimensional sheets (Fig. 5) (see Table 2).

Fig. 3

ORTEP drawing of the molecular structure for [{RuIIRuIII(piv)4}2(H2O){WV(CN)8}]− moiety of 1·H2O, showing the thermal ellipsoids at the 50% probability level. Hydrogen atoms are omitted for clarity.

Table 3

Hydrogen-bonding geometry (Å, °).

Table 3
D–H⋯AD–H (Å)H⋯A (Å)D⋯A (Å)D–H⋯A (°)
O17–H17E⋯O180.90 (8)1.85 (8)2.746 (11)174 (7)
O17–H17D⋯N7iii0.69 (7)2.12 (7)2.790 (11)163 (8)
O18–H18D⋯N6iii0.64 (8)2.40 (8)3.000 (11)158 (10)
Fig. 4

Packing diagram for 1·H2O, showing hydrogen bonding with dotted lines.

Fig. 5

Packing diagram of 1·H2O, showing the [n-Bu4N]+ moieties and 2D supramolecular Ru2W sheet.

Table 2

Selected bond distances (Å) and angles (°).

Table 2
W1–C12.193 (10)
W1–C22.186 (10)
W1–C32.179 (10)
W1–C42.175 (9)
W1–C52.191 (9)
W1–C62.184 (9)
W1–C72.180 (9)
W1–C82.173 (9)
Ru1–Ru1i2.298 (9)
Ru2–Ru2ii2.300 (10)
Ru3–Ru42.287 (8)
Ru1–O12.023 (8)
Ru1–O2i2.036 (8)
Ru1–O32.017 (7)
Ru1–O4i2.049 (8)
Ru1–N12.286 (11)
Ru2–O52.031 (8)
Ru2–O6ii2.024 (8)
Ru2–O72.023 (8)
Ru2–O8ii2.033 (8)
Ru2–N22.280 (11)
Ru3–O92.033 (8)
Ru3–O112.056 (7)
Ru3–O132.025 (8)
Ru3–O152.043 (7)
Ru3–N32.275 (10)
Ru4–O102.040 (8)
Ru4–O122.014 (7)
Ru4–O142.032 (8)
Ru4–O162.018 (7)
Ru4–O172.272 (9)
C1–W1–C2144.5 (3)
C1–W1–C3112.6 (2)
C1–W1–C469.7 (3)
C1–W1–C5141.1 (2)
C1–W1–C679.6 (3)
C1–W1–C774.7 (2)
C1–W1–C878.0 (2)
C2–W1–C384.0 (3)
C2–W1–C4145.6 (2)
C2–W1–C571.7 (3)
C2–W1–C6105.6 (3)
C2–W1–C773.4 (2)
C2–W1–C878.4 (2)
C3–W1–C474.7 (3)
C3–W1–C576.4 (3)
C3–W1–C6144.4 (3)
C3–W1–C7141.4 (2)
C3–W1–C871.2 (3)
C4–W1–C577.2 (4)
C4–W1–C679.2 (3)
C4–W1–C7138.1 (3)
C4–W1–C8118.1 (3)
C5–W1–C674.5 (3)
C5–W1–C7122.9 (3)
C5–W1–C8137.6 (3)
C6–W1–C773.2 (4)
C6–W1–C8143.9 (2)
C7–W1–C873.8 (4)
O1–Ru1–O2i178.60 (16)
O1–Ru1–O389.6 (4)
O1–Ru1–O4i90.9 (3)
O1–Ru1–N191.28 (19)
O1–Ru1–Ru1i89.52 (17)
O2i–Ru1–O390.2 (3)
O2i–Ru1–O4i89.3 (3)
O2–Ru1–N1i90.07 (19)
O2i–Ru1–Ru1i89.10 (16)
O3–Ru1–O4i178.64 (15)
O3–Ru1–N184.5 (2)
O3–Ru1–Ru1i88.9 (2)
O4i–Ru1–N196.8 (2)
O4i–Ru1–Ru1i89.8 (2)
N1–Ru1–Ru1i173.35 (13)
O5–Ru2–O6ii178.42 (15)
O5–Ru2–O790.1 (3)
O5–Ru2–O8ii89.5 (3)
O5–Ru2–N294.5 (2)
O5–Ru2–Ru2ii89.78 (17)
O6ii–Ru2–O790.4 (3)
O6ii–Ru2–O8ii89.9 (3)
O6ii–Ru2–N287.02 (19)
O6ii–Ru2–Ru2ii88.75 (17)
O7–Ru2–O8ii178.57 (15)
O7–Ru2–N284.0 (2)
O7–Ru2–Ru2ii88.53 (17)
O8ii–Ru2–N297.4 (2)
O8ii–Ru2–Ru2ii90.10 (10)
N2–Ru2–Ru2ii171.38 (14)
O9–Ru3–O1190.6 (3)
O9–Ru3–O13179.17 (15)
O9–Ru3–O1591.0 (4)
O9–Ru3–N390.0 (2)
O9–Ru3–Ru489.1 (2)
N3–Ru3–Ru4170.87 (13)
O10–Ru4–O1290.3 (4)
O10–Ru4–O14178.43 (17)
O10–Ru4–O1690.5 (4)
O10–Ru4–O1795.6 (2)
O10–Ru4–Ru389.8 (2)
O12–Ru4–O1489.6 (4)
O12–Ru4–O16178.62 (17)
O12–Ru4–O1790.7 (3)
O12–Ru4–Ru389.6 (3)
O14–Ru4–O1689.6 (4)
O14–Ru4–O1786.0 (2)
O14–Ru4–Ru388.7 (2)
O16–Ru4–O1788.1 (3)
O16–Ru4–Ru391.5 (3)
O17–Ru4–Ru3174.65 (13)

Magnetic susceptibility measurements were carried out in the temperature range of 2–300 K. The magnetic data of 1 are shown in Fig. 6 in the form of χMT-T plots, where χM is the molar magnetic susceptibility per (RuIIRuIII)2WV unit. As shown in Fig. 6, χMT at 300 K is 1.17 cm3 K mol−1 corresponding to the effective magnetic moment of 3.06 μB, which is definitely lower than the spin-only value (μS.O. = (33)1/2 = 5.74 μB) expected for magnetically isolated two dinuclear RuIIRuIII S = 3/2 ions (each dinuclear RuIIRuIII unit has an S = 3/2 spins because of the metal–metal bonding [5]) and a WV S = 1/2 ion (theoretical value for g = 2). As the temperature is lowered, χMT gradually increases up to a value of 6.52 cm3 K mol−1 at 26 K then below it rapidly increases until 6 K with a maximum of 40.5 cm3 K mol−1 (18.00 μB) at 6 K, and then decreasing rapidly down to 17.68 cm3 K mol−1 (11.90 μB) at 2 K. The magnetic behavior is characteristic of ferrimagnetic behavior because of antiferromagnetic interaction between RuIIRuIII and WV ions through the cyanido bridges. The first magnetization curves at different temperatures (Fig. 7) show that the magnetization increases but never reaches the expected saturation value for the ferromagnetically coupled system (Stotal = 4, Msat = 8 μB). However, the variation in the magnetization is different above and below 5 K, suggesting the onset of magnetic ordering. The zero-field-cooled (ZFC) and field-cooled (FC) magnetizations, M(T)ZFC and M(T)FC, respectively, rise below 5.5 K (Fig. 8), indicative of an onset magnetic transition with Tc at 5.5 K. Below 5.5 K, M(T)ZFC decreases presumably because of a domain wall freezing, whereas M(T)FC continues to increase up to 2 K. Below Tc, the field dependence of the magnetization M(H) shows magnetic hysteresis as shown in Fig. 9. The hysteresis curves at different temperatures show that the coercive field increases as the temperature decreases as expected for a magnet. The coercive field is about 150 Oe at 2 K. In case of [{RuIIRuIII(piv)4}3(H2O){WV(CN)8}], definitely high Tc value (44 K) and large coercive field (5600 Oe at 5 K) were observed [25]. In [{RuIIRuIII(piv)4}3(H2O){WV(CN)8}], the 2D sheet structure was constructed by assembling of 28-membered rings made up from four Ru2(piv)4+ units and four W(CN)83− units with alternating arrangement of [RuIIRuIII(piv)4]+ and [WV(CN)8]3−. The high Tc and large coercive field may be ascribed to the 2D sheet structure and the large anisotropies of the diruthenium cations and tungstate ions. We can suppose this kind of 2D sheet structure for the [Et4N][{RuIIRuIII(piv)4}2{WV(CN)8}] complex, which has the high Tc value of 80 K and large coercive field of 17,000 Oe at 5 K [30], because the 2D sheet structure was observed for the similar 2:1 mixed–metal complex, [{RuIIRuIII(CH3COO)4}2Pt (CN)4]·2H2O [29]. On the other hand, the present complex is essentially 1D chain structure, although the 2D sheet structure can be considered with hydrogen bonding between the O17 (water molecule) and N7iii (coordinated CN group) atoms. From the point of view of magnetic interaction, the present complex can be considered as 1D ferrimagnetic chain complex, resulting in the low Tc value and small coercive field.

Fig. 6

Temperature dependence of χMT of 1.

Fig. 7

Field dependence of the magnetization at different temperatures for 1.

Fig. 8

ZFC (upper) and FC (lower) magnetization curves measured in 15 G for 1.

Fig. 9

Magnetic hysteresis loop at 2 K for 1.

3 Conclusion

A new mixed-metal complex [n-Bu4N][{RuIIRuIII(piv)4}2(H2O){WV(CN)8}] was synthesized by introducing the cation, tetra (n-butyl)ammonium ion. The isolated mixed-metal system showed a ferrimagnetic behavior and the Tc value was estimated to be of 5.5 K from the ZFC and FC measurements. By comparison with the related complexes, the 2D sheet structure seems to be important to achieve high Tc value and the large coercive force. The mixed-metal systems containing ruthenium carboxylate and octacyanidotungstate are promising for constructing new magnetic materials.

4 Experimental section

4.1 General

Tetrafluoroborate of dinuclear ruthenium(II,III) and potassium octacyanidotungstate(IV) were prepared by a method described in the literature [11,25,33]. All of other reagents were commercially available and used as received.

4.2 Preparations

4.2.1 [n-Bu4N][{RuIIRuIII(piv)4}2(H2O){WV(CN)8}]·3H2O (1·3H2O)

To an aqueous solution (7 mL) of K4W(CN)8·2H2O (21 mg, 0.036 mmol), an aqueous solution (7 mL) of [Ru2 (piv)4(H2O)2]BF4 (30 mg, 0.036 mmol) and aqueous solution (7 mL) of n-Bu4NCl (60 mg, 0.22 mmol) was added. The reaction mixture was stirred overnight in the dark, the resulting brown precipitate was filtered off, washed with water, and dried in vacuo. Yield, 30.4 mg (67%). Single crystals suitable for X-ray diffraction work were grown by slow diffusion of an aqueous solution in an H-shaped tube at room temperature in the dark. Anal. Calcd for C64H116N9O20Ru4W: C, 40.04; H, 6.09; N, 6.57%. Found: C, 39.60; H, 5.81; N, 6.23%. IR (KBr, cm−1): 2145 (vCN), 1488 (νasCOO), 1420 (νsCOO). Diffuse reflectance spectra: λmax 260, 368, 466, 540 (sh), 750 (sh), and 1100 (br) nm.

4.3 Physical techniques

FT-IR spectra were recorded using a JASCO MFT-2000 spectrophotometer with KBr pellets. Solid-state UV–vis spectra were recorded in the range of 200–1500 nm using a Shimadzu UV-3100 spectrophotometer (reflection method). Elemental analyses were performed using a Thermo Finnigan FLASH EA1112 analyzer. DC and AC magnetic data were measured using a Quantum Design MPMS XL SQUID magnetometer. The magnetic measurements were carried out at the University Claude Bernard Lyon 1 on polycrystalline samples. To avoid orientation in the magnetic field, the samples were pressed in a homemade Teflon sample holder equipped with a piston. The data were corrected for diamagnetism of the sample holder and the constituent atoms using Pascal's constants [34].

4.4 X-ray data collection and refinement

Diffraction data on single crystals of 1 were collected on a Bruker CCD X-ray diffractometer (SMART APEX) using graphite-monochromated Mo Kα radiation. Crystal data and details concerning the data collection are given in Table 1. The structure was solved by an intrinsic phasing method and refined by full-matrix least-squares methods. The C32 and C33 atoms were disordered into two positions (C32A and C32B, C33A and C33B), with occupation factors of 0.454 and 0.546, respectively. The hydrogen atoms, except for the water molecule, were inserted at their calculated positions, and fixed there. All of the calculations were carried out on a Windows 7 Core i7 computer using SHELXT-2014/4 and SHELXL-2014/7 [35,36]. Crystallographic data have been deposited with Cambridge Crystallographic Data Centre (Deposit number CCDC-1894536). Copies of the data can be obtained free of charge via http://www.ccdc.cam.ac.uk/conts/retrieving.html (or from the Cambridge Crystallographic Data Centre, 12, Union Road, Cambridge, CB2 1EZ, UK; Fax, +44 1223 336033; e-mail, deposit@ccdc.cam.ac.uk).

Table 1

Crystal and experimental data.

Table 1
Chemical formula: C64H112N9O18Ru4W
Formula weight = 1883.75
T = 90 K
Crystal system: triclinicSpace group P1¯
a = 12.08 (5) Åα = 92.62 (10)°
b = 13.97 (6) Åβ = 92.21 (11)°
c = 26.21 (11) Åγ = 103.52 (7)°
V = 4289 (31) Å3
Z = 2
Dx = 1.459 g/cm3
Radiation: Mo Kα (λ = 0.71073 Å)
μ(Mo Kα) = 2.086 mm−1
F (000) = 1906
Crystal size = 0.04 × 0.40 × 0.52 mm3
No. of reflections collected = 26,265
No. of independent reflections = 19,177
θ range for data collection: 1.50–28.57°
Data/restraints/parameters = 19,117/0/926
Goodness-of-fit on F2 = 0.993
R indices [I > 2σ(I)]: R1 = 0.0526, wR2 = 0.1247
R indices (all data): R1 = 0.0815, wR2 = 0.1403
Measurement: Bruker Smart APEX CCD diffractometer
Program system: SHELXTL
Structure determination: intrinsic phasing (SHELXT-2014/4)
Refinement: full-matrix least-squares (SHELXL-2014/7)
CCDC deposition number: 1894536

Acknowledgments

The present work was partially supported by Grant-in-Aid for Scientific Research Nos. 16K05722 and 17K05820 from the Ministry of Education, Culture, Sports, Science and Technology (MEXT, Japan) and the NEXT-Supported Program for the Strategic Research Foundation at Private Universities, 2010–2014.

Bibliographie

[1] F.A. Cotton; C.A. Murillo; R.A. Walton Multiple Bonds between Metal Atoms, Springer Science and Business Media, New York, 2005

[2] M. Mikuriya Bull. Jpn. Soc. Coord. Chem., 52 (2008), p. 17

[3] M.A.S. Aquino Coord. Chem. Rev., 248 (2004), p. 1025

[4] M.A.S. Aquino Coord. Chem. Rev., 170 (1998), p. 141

[5] M. Mikuriya; D. Yoshioka; M. Handa Coord. Chem. Rev., 250 (2006), p. 2194

[6] Y. Sayama; M. Handa; M. Mikuriya; R. Nukada; I. Hiromitsu; K. Kasuga Coordination Chemistry at the Turn of the Century (G. Ondrejovic; A. Sirota, eds.), Slovak Technical University Press, Bratislava, 1999, p. 447

[7] H. Ishida; M. Handa; M. Mikuriya X-Ray Struct. Anal. Online, 30 (2014), p. 9

[8] Y. Hiraoka; T. Ikeue; H. Sakiyama; F. Guegan; D. Luneau; B. Gillon; I. Hiromitsu; D. Yoshioka; M. Mikuriya; Y. Kataoka; M. Handa Dalton Trans., 44 (2015), p. 13439

[9] H. Ishida; M. Handa; I. Hiromitsu; M. Mikuriya Chem. J. Moldova., 4 (2009) no. 1, p. 90

[10] H. Ishida; M. Handa; T. Ikeue; J. Taguchi; M. Mikuriya Chem. Pap., 64 (2010), p. 767

[11] Y. Sayama; M. Handa; M. Mikuriya; I. Hiromitsu; K. Kasuga Bull. Chem. Soc. Jpn., 73 (2000), p. 2499

[12] D. Yoshioka; M. Mikuriya; M. Handa Bull. Chem. Soc. Jpn., 77 (2004), p. 2205

[13] H. Ishida; M. Handa; I. Hiromitsu; M. Mikuriya Chem. Pap., 67 (2013), p. 743

[14] M. Handa; H. Ishida; K. Ito; T. Adachi; T. Ikeue; I. Hiromitsu; M. Mikuriya; K. Kasuga Chem. Pap., 62 (2008), p. 410

[15] D. Yoshioka; M. Handa; M. Mikuriya; I. Hiromitsu; K. Kasuga Mater. Sci.-Poland, 23 (2005), p. 765

[16] D. Yoshioka; M. Handa; M. Mikuriya; K. Kasuga Advances in Coordination, Bioinorganic and Inorganic Chemistry (M. Melnik; J. Sima; M. Tatarko, eds.), Slovak Technical University Press, Bratislava, 2005, p. 218

[17] D. Yoshioka; M. Mikuriya; M. Handa Chem. Lett., 31 (2002), p. 1044

[18] H. Ishida; M. Handa; I. Hiromitsu; S. Ujiie; D. Yoshioka; R. Mitsuhashi; M. Mikuriya New J. Chem., 43 (2019), p. 1134

[19] T.E. Vos; Y. Liao; W.W. Shum; J.-H. Her; P.W. Stephens; W.M. Reiff; J.S. Miller J. Am. Chem. Soc., 126 (2004), p. 11630

[20] T.E. Vos; J.S. Miller Angew. Chem., Int. Ed., 44 (2005), p. 2416

[21] J.S. Miller Dalton Trans., 35 (2006), p. 2742

[22] B.S. Kennon; K.H. Stone; P.W. Stephens; J.S. Miller CrystEngChem (2009), p. 2185

[23] J.-H. Her; P.W. Stephens; B.S. Kennon; C. Liu; J.S. Miller Inorg. Chim. Acta, 364 (2010), p. 172

[24] D. Matoga; M. Mikuriya; M. Handa; J. Szklarzewicz Chem. Lett., 34 (2005), p. 1550

[25] M. Mikuriya; D. Yoshioka; A. Borta; D. Luneau; D. Matoga; J. Szklarzewicz; M. Handa New J. Chem., 35 (2011), p. 1226

[26] M. Mikuriya; Y. Tanaka; D. Yoshioka; M. Handa Chem. J. Moldova., 9 (2014) no. 1, p. 93

[27] M. Mikuriya; Y. Tanaka; D. Yoshioka; M. Handa J. Supercond. Nov. Magnetism, 28 (2015), p. 1013

[28] M. Mikuriya; K. Ono; S. Kawauchi; D. Yoshioka; R. Mitsuhashi; M. Handa Chem. J. Moldova, 10 (2015) no. 2, p. 48

[29] M. Mikuriya; S. Kawauchi; K. Ono; R. Mitsuhashi; N. Yoshinari; T. Konno; H. Tanaka; M. Handa J. Supercond. Nov. Magnetism, 30 (2017), p. 2007

[30] M. Mikuriya; D. Yoshioka; R. Mitsuhashi; D. Luneau; D. Matoga; J. Szklarzewicz; M. Handa Acta Phys. Pol., 131 (2017), p. 120

[31] M. Mikuriya; S. Kawauchi; D. Yoshioka; R. Mitsuhashi; M. Handa X-ray Struct. Anal. Online, 34 (2018), p. 37

[32] K. Nakamoto Infrared and Raman Spectra of Inorganic and Coordination Compounds, Part B: Application in Coordination, Organometallic, and Bioinorganic Chemistry, John Wiley & Sons, Inc, New York, 2009

[33] D. Matoga; J. Szklarzewicz; M. Mikuriya Inorg. Chem., 45 (2006), p. 7100

[34] O. Kahn Molecular Magnetism, VCH publishers, New York, 1993

[35] G.M. Sheldrick Acta Crystallogr., C71 (2015), p. 3

[36] G.M. Sheldrick Acta Crystallogr., A64 (2008), p. 112

Commentaires - Politique

Ces articles pourraient vous intéresser

Oxidation catalysis of microporous metal carboxylate complexes

Chika Nozaki Kato; Wasuke Mori

C. R. Chim (2007)

3d and 4d coordination complexes and coordination polymers involving electroactive tetrathiafulvalene containing ligands

Fabrice Pointillart; Stéphane Golhen; Olivier Cador; ...

C. R. Chim (2013)