Crystal structure of ethanolammonium dioxo-(N-(2-ethanolato)- 2-oxy-3-methoxybenzaldiminato-O,N,O′)vanadate(V), (NH3CH2CH2OH)[VO2{(C6H4(OCH3)(O)CHNCCH2CH2O}]

Methanol solution of ammonium metavanadate (0.06 g, 0.5 mmol) and ethanolamine (0.3 ml) was added dropwise to the solution of o-vanillin-hydroxylamine (0.07 g, 0.5 mmol) dissolved in metha- nol with stirring. The reaction mixture was stirred for 15 h at RT, and the resulting yellow-brown solution was filtered off. The block-shaped yellow crystals of the title complex were deposited on the tube wall near the bottom end 24 h later. dium atom deviates from the plane by about 0.492 A. Chelation gives rise to one five-membered (V1-O5-C9-C8-N1) and one six- membered (V1-O2-C1-C6-C7-N1) rings. Both of the rings are slightly folded. The ligand system is practically planar with the mean deviation from plane about 0.013 A, and its angle with the coordination quasi-plane is about 17.9°. The apical position is oc- cupied by the vanadyl oxygen atom O3. The short V—O3 and V—O4 bond distances of 1.609 A and 1.655 A, respectively, characterize the O=V=O double bonds (3). The V—N1 bond length of 2.156 A is similar to that in other analogues (4-5). The N1—C7 distance of 1.284 A confirms the coordination of the ethanolamine to the o-vanillin. The formative congeries array regularly and parallel the b axis. There are hydrogen bond interac- tion and- packing effect showing in the packing scheme, with all the hydrogen bond lengths (1.828 A – 2.516 A) in the normal range (6) and the distance of vicinal - plane about 3.302 A.