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Journal of the Chemical Society Dalton Transactions

Article . 1995 . Peer-reviewed

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Pyridyl to amido and amido to pyridyl isomerisation in an isonicotinamide complex of ruthenium(III)

descriptionPublicationkeyboard_double_arrow_right Article 01 Jan 1995 English Publisher:Royal Society of Chemistry (RSC)Journal:Journal of the Chemical Society, Dalton Transactions (issn: 0300-9246, eissn: 1364-5447,

Authors: Debabrata Chatterjee; Hari C. Bajaj;

doi: 10.1039/dt9950003415

Pyridyl to amido and amido to pyridyl isomerisation in an isonicotinamide complex of ruthenium(III)

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Abstract

The reaction of [RuIII(edta)(H2O)]–(edta = ethylenediamine-N,N,N′,N′-tetraacetate) with isonicotinamide (isna) was studied spectrophotometrically at different pH (6–10), isonicotinamide concentrations and ionic strengths. The pyridyl-N-co-ordinated complex [Ru(edta)(isna)]– is stable at low pH (6.0), but undergoes intramolecular isomerisation at high pH (9.6) to yield the amido-N-co-ordinated [Ru(edta)(isna)]2–. Upon acidification, the amido-N-bonded species isomerises back to the pyridyl-N-co-ordinated isomer.

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