Synthesis, characterization and novel crystal structure of (salicylaldehyde-4-phenylthiosemicarbazidato) ammonium dioxovanadate(V) with a V-S bond

(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 b y single-crystal X-ray diffraction which shows it to be the first example o f a dioxovanadate(V) complex in which the vanadium is also linked to a sulf ur atom. The PhSNO moiety is a bivalent, tridentate ligand. The V atom has the common square-pyramidal coordination geometry, which is compared with t hat found in other dioxovanadate(V) structures. The complex is linked to th e NH4+ ion by a net of hydrogen bonds. (C) 2000 Elsevier Science S.A. All r ights reserved.