Synthesis and structural characterisation of new Re(III) complexes using aldimines of α-amino acids as coligands

Complexes of the general formula [ReIII(L)Cl(PPh3)2] have been synthesised by reacting H2L and [ReOCl3(PPh3)2] in ethanol. Here H2L represents imines of α-amino acids (glycine, l-alanine, l-valine, l-phenylalanine) derived from salicylaldehyde and naphthaldehyde. The crystal structure of one complex has been determined. The complexes are mononuclear, paramagnetic and display paramagnetic 1H NMR in CDCl3 solution. Their spectral and redox properties are scrutinised.

Graphical abstractThe reaction of [ReOCl3(PPh3)2] with the imines of α-amino acids (glycine, l-alanine, l-valine, l-phenylalanine) derived from salicylaldehyde and naphthaldehyde in ethanol afforded orange-red coloured complexes of the general formula [ReIII(L)Cl(PPh3)2]. The crystal structure of one complex has been determined. Their solution properties were deduced from spectroscopic measurements.Figure optionsDownload full-size imageDownload as PowerPoint slide