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Oxovanadium(IV) and -(V) Complexes with Aminoalcohol Ligands: Synthesis, Structure, Electrochemical, and Magnetic Properties

✍ Scribed by Winfried Plass

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
657 KB
Volume
1998
Category
Article
ISSN
1434-1948

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✦ Synopsis

The aminoalcohol ligands diethanolamine (H 2 dea) and triethanolamine (H 3 tea) react with [VO(acac) 2 ] to yield the tetranuclear oxovanadium(IV) complexes [{VO(dea)} 2 -{VO(acac)} 2 (Β΅ 2 -OMe) 2 ] (1) and [{VO(Htea)} 2 {VO(acac)} 2 (Β΅ 2 -OMe) 2 ] (2). In the case of the potentially bridging aminoalcohol ligands N,N,NЈ,NЈ-tetrakis(2-hydroxyethyl)ethylenediamine (H 4 edte) and N,N,NЈ,NЈ-tetrakis(2-hydroxypropyl)ethylenediamine (H 4 edtp) the corresponding oxovanadium(IV) complexes could not be isolated. Instead after air oxidation the ligand supported binuclear oxovanadium(V) complexes [{VO(acac)]} 2 (edte)] (3) and [{VO(acac)} 2 (edtp)] (4) are obtained. The reaction of the ligand H 4 edtp with ammonium meta-vanadate in methanol solution leads to the methoxy bridged binuclear oxovanadium(V) complex [(VO) 2 (edtp)(Β΅ 2 -OMe) 2 ] (5). The tetranuclear oxovanadium(IV) complexes can be isolated as crystalline compounds 1 β€’ 2 MeOH and 2 β€’ 2 MeOH and have been characterized by

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