Synthesis and Structural Characterisation of the Isotypic Complexes MᴵᴵL₂(py)₂·2H₂O (M = Cu, Zn); the Interplay of Lattice Imposed Ligand Disposition and Jahn-Teller Distortions [HL = 5-(4-methoxyphenyl)pyrazole-3-carboxylic Acid]
Abstract
The mononuclear complexes of general formula ML2(H2O)2 (M = Zn, Cu, Ni, Co) and ML2(py)2•2H2O (M = Zn, Cu, Co) have been prepared [HL = 5-(4-methoxyphenyl)pyrazole-3-carboxylic acid, py = pyridine]. The crystal structures of ZnL2(py)2·2H2O and CuL2(py)2·2H2O have been determined and are isotypic. Two independent molecules are present in the structures, both of which are pseudo-octahedral with mutually trans stereochemistries. In the zinc case the two metal coordination environments differ only slightly and these differences are probably due to packing forces, but for copper the differences are greater and indicate that the direction of the Jahn-Teller distortion observed is dependent upon the subtle constraints imposed by the lattice. The occurrence of such molecular forms is unique for such donor sets and allows a special opportunity to observe the interplay of Jahn-Teller effects and packing forces.
Recommended Citation
J. D. Crane et al., "Synthesis and Structural Characterisation of the Isotypic Complexes MᴵᴵL₂(py)₂·2H₂O (M = Cu, Zn); the Interplay of Lattice Imposed Ligand Disposition and Jahn-Teller Distortions [HL = 5-(4-methoxyphenyl)pyrazole-3-carboxylic Acid]," Journal of the Chemical Society, Dalton Transactions, Royal Society of Chemistry, Jan 1999.
The definitive version is available at https://doi.org/10.1039/A809046G
Department(s)
Chemistry
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 1999 Royal Society of Chemistry, All rights reserved.
Publication Date
01 Jan 1999
