Synthesis, Crystal Structure and Characterisation of a Novel Chiral Mixed-Valence Vanadium Oxide Hybrid, [V5O11(dien)3]

✍ Scribed by Ming-Lai Fu; Guo-Cong Guo; A-Qing Wu; Bin Liu; Li-Zhen Cai; Jin-Shun Huang

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 140 KB
• Volume: 2005
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/ejic.200500055

✦ Synopsis

Abstract

The novel chiral mixed‐valence vanadium oxide hybrid [V~5~O~11~(dien)~3~] (1) (dien = NH~2~C~2~H~4~NHC~2~H~4~NH~2~) has been synthesised by a hydrothermal reaction of V~2~O~5~ and dien in aqueous solution and characterised by elemental analysis, IR spectroscopy, TG‐DSC analysis, magnetism, EPR spectroscopy, single‐crystal X‐ray diffraction and powder XRD. The X‐ray diffraction analysis revealed that the structure of 1 can be regarded as being constructed from two [V^V^O~4~]^3–^ groups bicapping three [V^IV^O(dien)]^2+^ units to form a discrete asymmetric pentanuclear vanadium complex with the dien ligands coordinating directly to the vanadium(IV) centres. Compound 1 exhibits an interesting tube‐like 3D supramolecular structure due to abundant hydrogen‐bonding interactions between the oxygen atoms of the inorganic backbone and the hydrogen atoms of the dien ligands from adjacent molecules. The variable‐temperature magnetic susceptibility data of 1 suggest a weak ferromagnetic interaction among V^4+^ ions in the cluster. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)