Preparation of [VO(sal-L-Trp)(H2O)] (sal-L-Trp = N-salicylidene-L-tryptophanate) and characterisation of an unusual product obtained from its solutions in water-pyridine

João Costa Pessoa, Maria Teresa Duarte, Robert D. Gillard, Catarina Madeira, Pedro M. Matias, Isabel Tomaz

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18 Citations (Scopus)

Abstract

A vanadium(IV) complex [VO(sal-L-Trp)(H2O)] 1 (sal-L-Trp = N-salicylidene-L-tryptophanate) has been isolated from solutions containing oxovanadium(IV), L-tryptophan and salicylaldehyde. From solutions also containing quinolin-8-ol (Hhquin) a similar oxovanadium(IV) complex VO(sal-L-Trp)·Hhquin·2H2O 2 was isolated. From solutions of 1 in water-pyridine, orange-brown crystals of [HPy+]4[C14H13N2 +]2[V10O286-] 3 were isolated and characterised by X-ray diffraction. The mechanism proposed for this reaction involves the attack of a pyridine molecule at the β-carbon atom of the tryptophan residue in 1.

Original languageEnglish
Pages (from-to)4015-4020
Number of pages6
JournalJournal of the Chemical Society - Dalton Transactions
Issue number23
Publication statusPublished - 7 Dec 1998

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