摘要:
The synthesis, spectral characterisation of the zinc(II) pyrrolecarboxylates, [Zn(2-Hpyrrc)(2)(H(2)O)] (1) and [Zn(2-Hpyrrc)(2)(1-methylimidazole)(2)] (2) (Z-H(2)pyrrc = 2-pyrrolecarboxylic acid) is reported as well as the X-ray structure determination of the latter compound. The molecular.structure of 2 exhibits a distorted tetrahedral geometry around the zinc atom. The pyrrole-2-carboxylic acid acts as a monodentate ligand, syn-bound via one carboxylate oxygen atom. In the crystal structure, the discrete molecules of 2 are organised in dimers linked by a complex network of hydrogen bonds. A comparative IR study confirms the existence of different types of hydrogen bonding. (C) 1998 Elsevier Science Ltd. All rights reserved.