Pyridine-2-carboxamide complexes of arylimidorhenium(VI) derived from 2-pyridylmethyleneamine complexes of arylimidorhenium(V) via oxygen-atom transfer

Sangeeta Banerjee, Bimal Kumar Dirghangi, Mahua Menoh, Amitava Pramanik, Animesh Chakravorty

Research output: Contribution to journalArticlepeer-review

Abstract

Complexes of type [ReVL(NC6H4Y-p)Cl3] (Y = H or Cl) have been synthesized where L is the Schiff base formed from pyridine-2-carbaldehyde and the aniline p-XC6H4NH2 (X = Me or Cl). Treatment with aqueous nitric acid in acetonitrile converts them into [ReVIL′(NC6H4Y-p)Cl3], where L′ is a monoanionic pyridine-2-carboxamide. The latter complexes display hyperfine-split six-line solution EPR spectra at room temperature. The crystal structures of [ReL(NC6H4Cl)Cl3] and [ReL′(NC6H4Cl)Cl3] (X = Me in both cases) revealed the presence of severely distorted and meridionally configured ReCl3N3 co-ordination spheres. The effective metal radius decreases only marginally upon metal oxidation and the imide fragment is approximately linear and triple bonded, Re≡N-C, in both cases. The rhenium(VI)-rhenium(V) reduction potentials in the two types of complex are ≈1.0 and ≈0.2 V respectively.

Original languageEnglish (US)
Pages (from-to)2149-2153
Number of pages5
JournalJournal of the Chemical Society - Dalton Transactions
Issue number12
DOIs
StatePublished - Jun 21 1997
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)

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