Synthesis and Characterization of Mo6 Chalcobromides and Cyano-Substituted Compounds Built from a Novel [(Mo6Bri6Yi2)La
详细信息 查看全文
- 作者：Sté ; phane Cordier ; Nikolaï ; G. Naumov ; Diala Salloum ; Fré ; dé ; ric Paul ; and Christiane Perrin
- 刊名：Inorganic Chemistry
- 出版年：2004
- 出版时间：January 12, 2004
- 年：2004
- 卷：43
- 期：1
- 页码：219 - 226
- 全文大小：200K
- 年卷期：v.43,no.1(January 12, 2004)
- ISSN：1520-510X
文摘
The syntheses, crystal structures determined by single-crystal X-ray diffraction, and characterizations of new Mo6cluster chalcobromides and cyano-substituted compounds with 24 valence electrons per Mo6 cluster (VEC = 24),are presented in this work. The structures of Cs4Mo6Br12S2 and Cs4Mo6Br12Se2 prepared by solid state routes arebased on the novel [(Mo6Bri6Yi2)Bra6]4- (Y = S, Se) discrete units in which two chalcogen and six bromine ligandsrandomly occupy the inner positions, while the six apical ones are fully occupied by bromine atoms. The interactionof these two compounds with aqueous KCN solution results in apical ligand exchange giving the two first Mo6cyano-chalcohalides: Cs0.4K0.6(Et4N)11[(Mo6Br6S2)(CN)6]3·16H2O and Cs0.4K0.6(Et4N)11[(Mo6Br6Se2)(CN)6]3·16H2O. Theircrystal structures, built from the original [(Mo6Bri6Yi2)(CN)a6]4- discrete units, will be compared to those of the twosolid state precursors and other previously reported Mo6 cluster compounds. Their redox properties and 77Se NMRcharacterizations will be presented. Crystal data: Cs4Mo6Br12S2, orthorhombic, Pbca (No. 61), a = 11.511(5) Å, b= 18.772(5) Å, c = 28.381 Å (5), Z = 8; Cs4Mo6Br12Se2, Pbca (No. 61), a = 11.6237(1) Å, b = 18.9447(1) Å,c = 28.4874(1) Å, Z = 8; Cs0.4K0.6(Et4N)11[(Mo6Br6S2)(CN)6]3·16H2O, Pm-3m (No. 221), a = 17.1969(4) Å, Z =1; Cs0.4K0.6(Et4N)11[(Mo6Br6Se2)(CN)6]3·16H2O, Pm-3m (No. 221), a = 17.235(5) Å, Z = 1.