Synthesis and spectroscopic characterization of mixed ligand complexes of oxovanadium(V)

Abstract

Equimolar reaction of VO(OPr<i>^J</i>)₃ witli <i>N </i>phenyldiethanolamine

affords [VO (L)(μ- OPr<i>^J</i>)]₂ (l), which reacts with a variety of mono- and bi -dentate ligands such as MeOH, EtOH, MeOCH₂CH₂OH, MeNHCH₂CH₂OH, Me₃CCH₂OH, Me₃COH, EtCMe₂OH, and C₁₀H₇N=CHC₆H₄OH (where C₁₀H₇

represents napthyl group) yielding the dimeric [VO(L)(μ-OMe)]₂(<b>2</b>) [VO(L)(μ-OEt)]₂ (<b>3</b>), [VO(L)(μ-O CH₂CH₂OMe)]₂ (<b>4</b>),[VO( L)(μ-OCH₂OCH₂NHMe)]₂(<b>5</b>) , [VO( L)(μ-OC H₂CMe₃)]₂ (<b>6</b> ), [VO( L)(μ-OCMe₃)]₂(<b>7</b>), [VO( L)(μ-OCMe₂Et]₂ (<b>8</b>), and the monomeric complexes, [VO(L)(OC₆H₄CHNC₁₀H₇)](<b>9</b>),

respectively. A detailed study of alcoholysis reactions of VO(L)( OPr<i>^J</i>) with a number of monofunctional alcohols indicates the following order of reactivity: OMe > OEt ≈ OCH₂CH₂OMe ≈ OCH₂CH₂NHMe > OCH₂CMe₃ > OCMe₃ > OCMe₂ Et. All of these complexes have been characterized by elemental analyses, molecular weight measurements and speclroscopic (IR, ¹H and ⁵¹V

<span style="font-size:14.0pt;line-height:115%;font-family:" times="" new="" roman";="" mso-fareast-font-family:hiddenhorzocr;color:black;mso-ansi-language:en-in;="" mso-fareast-language:en-in;mso-bidi-language:hi"="" lang="EN-IN">NMR) studies, on the basis of which plausible structures have been suggested for the novel complexes.</span>