Structure and spectroscopic properties of [di(3-aminopropyl)amine-N,N′,N″][iminodiacetato-N,O,O′]chromium(III) perchlorate

Add time:08/13/2019    Source:sciencedirect.com

The mixed-ligand complex [Cr(dpt)(ida)]ClO4·2H2O (dpt=di(3-aminopropyl)amine, H2ida=iminodiacetic acid) adopts a structure in which the ligands are tridentate and coordinate facially, with the imino nitrogen trans to the dpt secondary amine. Thus the preference of iminodiacetate for facial coordination prevails over the preference of di(3-aminopropyl)amine for meridional coordination. The crystal structure of the title complex has been determined: space group Pbca; a=17.609(2), b=14.762(2), c=14.423(2) Å, Z=2. An analysis of the 4Azg→{2Eg, 2T1g} electronic spectrum shows the iminodiacetate carboxylate groups to be moderately strong σ and π-donors.

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