Syntheses, Structures, and Electrochemical Properties of Metallacyclic Oxidovanadium(V) Complexes with Asymmetric Multidentate Linking Ligands.

Trinuclear metallacyclic oxidovanadium(V) complexes, [{VO(LR)}] (-) with asymmetric multidentate linking ligands (HLR: R = H, Me, Br), were synthesized. The molecular structure of is characterized as a tripod structure, with each V(V) ion coordinated by -atoms from a tridentate Schiff base site and -atoms from a bidentate benzoxazole site of two respective HLH ligands. The intramolecular V⋯V distances range from 8.0683 to 8.1791 Å. Complex is a mononuclear dioxidovanadium(V) complex, (EtNH)[VO(HLH)]. Cyclic voltammograms of - in DMF revealed redox couples attributed to three single-electron transfer processes.