Lipophilic chloro-oxo-bis(hydroxamato)vanadium(V) complexes: synthesis methods and structure

New methods for the synthesis of complexes of vanadium(V) with hydrophobic alkyl- and aryl-substituted hydroxamic acids as well as hydrophilic ones of the general formula VOL2Cl have been developed. Complexes of the above formula with alkyl substituents on the ligands (L) have been obtained for the first time. Studies using the 51V NMR method show the presence of two forms of the complexes in solution, which coalesce with increasing temperature. Chloro-oxo-bis(N-methyl-acetohydroxamato)vanadium(V) has been characterized by X-ray crystallography.