| Abstract |
The synthesis, structure and spectroscopic properties of complexes with the formula [(VO)-O-IV( dsal)(2)(H2O)], where Hdsal = salicylaldehyde, o-vanillin and 3-ethoxysalicylaldehyde, are presented. The crystal and molecular structures of [(VO)-O-IV(o-van)(2)(H2O)] (1) (o-Hvan = o-vanillin = 3-methoxysalicylaldehyde) is studied by single-crystal X-ray diffraction. Each molecule exhibits an octahedral geometry with the two o-van ligands coordinated cis to the (VO2+)-O-IV group. 1 is the first example of a structurally characterized vanadium complex involving O-aldehyde as the donor atom and this enables a comparison between the bonding characteristics and the contributions of O-aldehyde, O-amide, O-carboxylate and O-ketone (in acetylacetone) to the parallel hyperfine coupling constant in VOL2 complexes. (C) 2000 Elsevier Science Inc. All rights reserved. |
