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Synthesis, structure and magnetic properties of 3D interpenetrating nets of M(pyrazine)[Au(CN)(2)](2) (M = Cu, Ni, Co) supported by aurophilic interactions

TitleSynthesis, structure and magnetic properties of 3D interpenetrating nets of M(pyrazine)[Au(CN)(2)](2) (M = Cu, Ni, Co) supported by aurophilic interactions
Publication TypeJournal Article
Year of Publication2001
AuthorsLeznoff, DB, Xue, BY, Stevens, CL, Storr, A, Thompson, RC, Patrick, BO
JournalPolyhedron
Volume20
Pagination1247-1254
Date PublishedMay
Type of ArticleProceedings Paper
ISBN Number0277-5387
KeywordsANTIFERROMAGNET, aurophilic, COMPLEXES, COMPONENT, coordination polymers, CRYSTAL-STRUCTURE, Cu(II) complexes, cyanide ligands, DICYANOAURATE(I), FERROMAGNET, interactions, interpenetration, MAGNETIC PROPERTIES, NITRATE, NITROXIDE, Pyrazine
Abstract

{New inorganic coordination polymers of the form M(pyrazine)[Au(CN)(2)](2) (M = Cu (1); Ni (2); Co (3)) have been prepared and the copper(II) analogue structurally characterised. The X-ray analysis revealed two 3D interpenetrating alpha -polonium networks consisting of 1D chains of Cu-pyrazine units connected by [Au(CN)(2)] bridges. The two networks are connected via weak aurophilic interactions (Au-Au: 3.4729(2) Angstrom). Thermogravimetric analysis of all three compounds indicated the robust nature of these 3D systems, with decomposition beginning at 260 (1), 406 (2) and 360 degreesC (3). The magnetic susceptibility of 1 shows a maximum in chi (M) at 5.0 K; these data could be fitted to the theoretical expressions for either a 1D or a 2D Heisenberg antiferromagnetic array (J = -2.74 cm(-1)

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