Tetraaqua-1κ4O-bis(ɛ-caprolactam-1κO)-μ-cyano-1:2κ2N:C-pentacyano-2κ5C-iron(III)yttrium(III), a novel cyano-bridged dinuclear complex

• Published in: Acta crystallographica. Section C, Crystal structure communications Crystal structure communications, 2002-09, Vol.58 (9), p.m478-m480
• Main Authors: He, Yi, Zhou, Bei Chuan, Kou, Hui-Zhong, Xiong, Ming, Wang, Ru-Ji, Li, Yadong
• Format: Article
• Language: English
• Subjects: Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Inorganic compounds; Metal complexes; Physics; Structure of solids and liquids; crystallography; Structure of specific crystalline solids
• ISSN: 0108-2701; 1600-5759
• DOI: 10.1107/S0108270102014026

Using caprolactam as a ligand, the novel title cyano‐bridged yttrium(III)–ferricyanide complex, [Y(caprolactam)2(H2O)4Fe(CN)6] or [FeY(CN)6(C6H11NO)2(H2O)4], has been synthesized and structurally characterized. The Y atom is seven‐coordinate and has approximately pentagonal–bipyramidal stereochemistry, with water mol­ecules occupying apical positions. Of the five ligands in equatorial positions, one is the N‐bound bridging cyano group, and flanking this are two O‐­bound caprolactam moieties, which are markedly inclined towards the bridged ferricyanide moiety such that they partially envelop it. Water mol­ecules occupy the remaining two equatorial positions. The Y—N—C—Fe—C—N sequence of atoms lies on a crystallographic twofold axis and is therefore perfectly linear, which has not been observed previously in cyano‐bridged bimetallic complexes.