Issue 3, 2009

Annealing assisted mechanochemical syntheses of transition-metal coordination compounds and co-crystal formation

Abstract

This article focuses on heating or annealing process in the mechanochemical preparation of coordination compounds in the solid state. Heating of metal complexes often promotes the liberation of weakly coordinated ligands and results in the complex with its coordination geometry unsaturated. Such “activated” complexes can be used as the building blocks of coordination polymers in the solid state. As one example, our recent work on [M(CNacac)2] (CNacac = 3-cyano-pentane-2,4-dionato, M = MnII, FeII, CoII, NiII, CuII and ZnII) is presented. Further, co-grinding and annealing treatments of an enantiomeric pair of chiral crystals of [M(phen)3](PF6)2 (M = RuII and OsII, phen = 1,10-phenanthoroline) afford diffusion and rearrangement of transition metal complex ions to form co-crystal phases of racemic or quasi-racemic compounds by way of recognizing chirality. Our latest result of co-crystal formation via chirality transfer between optically stable and labile metal complexes is also briefly introduced.

Graphical abstract: Annealing assisted mechanochemical syntheses of transition-metal coordination compounds and co-crystal formation

Article information

Article type
Paper
Submitted
04 Nov. 2008
Accepted
21 Nov. 2008
First published
19 Dec. 2008

CrystEngComm, 2009,11, 427-432

Annealing assisted mechanochemical syntheses of transition-metal coordination compounds and co-crystal formation

R. Kuroda, J. Yoshida, A. Nakamura and S. Nishikiori, CrystEngComm, 2009, 11, 427 DOI: 10.1039/B819701F

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