Issue 23, 2002
From the journal:

Journal of the Chemical Society, Dalton Transactions

Coordination modes of 2-mercaptonicotinic acid: synthesis and crystal structures of palladium(ii), platinum(ii), rhenium(iii) and molybdenum(vi) complexes

Susana M. O. Quintal,a   Helena I. S. Nogueira,*a   Vitor Félixa  and  Michael G. B. Drewb  

* Corresponding authors

a Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
E-mail: helena@dq.ua.pt

b Department of Chemistry, University of Reading, Whiteknights, Reading, UK

Abstract

New Pd(II), Pt(II), Re(III), Mo (VI) and Mo(V) complexes with 2-mercaptonicotinic acid (HnicSH), [Pd(PPh3)(HnicS)2]·0.5CH3OH 1, [Pd(HnicS)2]·CH3OH 2, [Pt(PPh3)(HnicS)2]·NEt3·H2O 3, [Pt(HnicS)2] 4, [Pt(bipy)(HnicS)2]·CH3OH 5, [Re(PPh3)(OCH3)(HnicS)2] 6, [ReI2(PPh3)2(HnicS)] 7, [MoO2(CH3NicS)2] 8 and [Mo2O3(CH3nicS)4]·DMF 9 have been prepared. The crystal structures of compounds 1, 3, 8 and [ReI2(PPh3)2(HnicS)]·0.5H2O·DMF (7·0.5H2O·DMF) were determined by X-ray diffraction. Complexes 1 and 3 contain two HnicS− ligands bonded in two different coordination modes: monodentate (S) and chelating (N,S). Complexes 7 and 8 contain only one HnicS− ligand which is bidentate (N,S). Infrared, 1H and 13C-{1H} NMR spectroscopic data for the complexes are presented. The Mo(VI) complex 8 is active towards oxygen atom transfer reactions and can catalyse the oxidation of benzoin and PPh3 with dmso; the catalysis occurs via the Mo(V) complex 9 which has been isolated and characterized.

Graphical abstract: Coordination modes of 2-mercaptonicotinic acid: synthesis and crystal structures of palladium(ii), platinum(ii), rhenium(iii) and molybdenum(vi) complexes

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Article information

DOI
https://doi.org/10.1039/B206101E
Article type
Paper
Submitted
25 Jun 2002
Accepted
26 Sep 2002
First published
06 Nov 2002

J. Chem. Soc., Dalton Trans., 2002, 4479-4487

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Coordination modes of 2-mercaptonicotinic acid: synthesis and crystal structures of palladium(II), platinum(II), rhenium(III) and molybdenum(VI) complexes

S. M. O. Quintal, H. I. S. Nogueira, V. Félix and M. G. B. Drew, J. Chem. Soc., Dalton Trans., 2002, 4479 DOI: 10.1039/B206101E

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