Self assembly in transition metal complexes: structural characterisation of the zinc carboxylate{bis(2-pyrrolecarboxylato)bis(1-methylimidazole)}zinc(II)

Add time:09/02/2019    Source:sciencedirect.com

The synthesis, spectral characterisation of the zinc(II) pyrrolecarboxylates, [Zn(2-Hpyrrc)2(H2O)] (1) and [Zn(2-Hpyrrc)2(1-methylimidazole)2] (2) (2-H2pyrrc = 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.

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