Novel crystal structure of (Salicylaldehyde-4-phenylthiosemicarbazidato) ammonium dioxovanadate(V) with V-N, V-O and V-S bonds

(Salicylaldehyde-4-phenylthiosemicarbazidato) ammonium dioxovanadate(V), {1, NH₄[VO₂(PhSNO)]}, was synthesized and characterized by spectroscopic and magnetic measurements. Its crystal and molecular structure was determined by single-crystal X-ray diffraction which shows it to be the first example of a dioxovanadate(V) complex in which the vanadium is also linked to a sulfur atom. The PhSNO moiety is a bivalent, tridentate ligand. The V atom has the common square-pyramidal coordination geometry, which is compared with that found in other dioxovanadate(V) structures. The complex is linked to the NH₄⁺ ion by a net of hydrogen bonds. (C) 2000 Elsevier Science S.A.