Novel octahedral tungsten sulfidocyanide cluster anion [W6S8(CN)6]6–

Abstract

Novel tungsten octahedral sulfidocyanide cluster compounds Na6[W6S8(CN)6].18DMSO 1 and K6[W6S8(CN)6] 2 have been synthesized and characterized by X-ray crystallography and NMR spectroscopy.

3D‐Coordination Cluster Polymers [Ln(H2O)3Re6Te8(CN)6]·nH2O (Ln = La3+, Nd3+): Direct Structural Analogy with the Mononuclear LnM(CN)6·nH2O Family

“…Each rhenium atom is coordinated to one cyano group forming an almost linear ReϪCϪN fragment. Selected bond distances of structures 1, 2 and other related complexes are listed in Table 1 6 ] we can say that the oxidation does not significantly affect these distances (within the limits of the errors obtained). www.eurjic.org Figure 2.…”

“…Chemical analysis (EDAX) of the crystals showed that they contained no potassium. The magnetic susceptibility of 1 is µ eff (298) ϭ 1.81 µ B which corresponds to one unpaired electron per formula unit [La(H 2 O) 3 6 ] 3ϱ . Structure 1 contains one rhenium atom (Re1), two tellurium atoms (Te1, Te2), one cyano group (C1, N1), Ln1, and O1 (coordinated water) in its asymmetric unit ( Figure 1).…”

“…Despite the equivalent disposition of terminal cyano groups in [M(CN) 6 ] nϪ and [M 6 Q 8 (CN) 6 ] nϪ , it is difficult to expect isotypical structures when [M(CN) 6 ] nϪ is changed to [M 6 Q 8 (CN) 6 ] nϪ . The reason is the larger size of cluster cyanides compared with mononuclear ones.…”

“…These anions are topological analogues of hexacyanometalate ions [M(CN) 6 ] nϪ and the anions can form polymeric arrays based on covalent cyanobridged interactions with transition metals, for instance ···ϪRe 6 ϪCϵNϪMϪNϵCϪRe 6 Ϫ··· (selected references: Re:…”

“…Octahedral cluster cyano complexes of transition metals have been intensively studied during the past decade (selected references: [Re 6 6 ] 7Ϫ [4,5] , [W 6 Q 8 (CN) 6 ] 6Ϫ [6] , [Nb 6 Cl 12 (CN) 6 ] 4Ϫ [7,8] and heterometallic [Re 6Ϫx Mo x S 8 (CN) 6 ] 5Ϫ [9] ). These anions are topological analogues of hexacyanometalate ions [M(CN) 6 ] nϪ and the anions can form polymeric arrays based on covalent cyanobridged interactions with transition metals, for instance ···ϪRe 6 ϪCϵNϪMϪNϵCϪRe 6 Ϫ··· (selected references: Re:…”