Reactions of mercury(II) with 2-pyridinecarboxylic and 6-methyl-2-pyridinecarboxylic acids and corresponding esters. Crystal structures of [Hg(C5H4NCOO2], [HgX2(C5H4NCOOPri)], X = Br or I and [HgCl2(MeC5H3NCOOEt)]

Pilar Gonzàlez-Duarte, Àngels Leiva, Ricard March, Josefina Pons, William Clegg, Xavier Solans, Angel Álvarez-Larena, Joan Francesc Piniella

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18 Citations (Scopus)

Abstract

Several mercury(II) complexes with 2-pyridinecarboxylic and 6-methyl-2-pyridinecarboxylic acids as well as with corresponding esters have been obtained and some of them structurally characterized by X-ray diffraction. [HgC5H4NCOO)2] consists of one-dimensional chains of octahedrally coordinated mercury atoms linked by means of the oxygen atoms of the carboxylate groups. The structure of the isomorphous complexes [HgX2(C5H4NCOOPri)], X = Br or I, consists of isolated centrosymmetric dimers with unsymmetrical μ-X bridges, where mercury atoms are in a distorted square pyramidal coordination. Complex [Hg(Cl2(MeC5H3NCOOEt)] has a polymeric chain structure formed by loosely bound formula units through a unique non-planar bis(chloride) asymmetric Hg(μ-Cl)2Hg bridge. In all cases picolinate ligands behave as chelates. The crystal structures are compared with those found for the related family [HgCl2(C5H4NCOOR)], R = Me, Et, Prn or Pri. © 1998 Published by Elsevier Science Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)1591-1600
JournalPolyhedron
Volume17
Issue number9
DOIs
Publication statusPublished - 10 May 1998

Keywords

  • Chelate complexes
  • Crystal structures
  • FAB mass spectra
  • Mercury complexes
  • Picolinate complexes

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