Title

Synthesis and characterization of tris(heteroleptic) diimine complexes of chromium(III)

ACS Citation

Donnay, E. G.; Schaeper, J. P.; Brooksbank, R. D.; Fox, J. L.; Potts, R. G.; Davidson, R. M.; Wheeler, J. F.; Kane-Maguire, N. Synthesis and characterization of tris(heteroleptic) diimine complexes of chromium(III). Inorg. Chim. Acta 2007, 360, 3272-3280.

Abstract

A preparative procedure of potentially wide applicability is described for the synthesis of previously unreported tris(heteroleptic) Cr(diimine)3]3+ complexes. The synthetic scheme involves the sequential addition of three different diimine ligands, and employs CrCl3-·6H2O as the initial Cr(III) reagent. The synthesis and characterization of the complexes Cr(TMP)(phen)(diimine-€²)]3+ are reported (where TMP=3,4,7,8-tetramethyl-1,10-phenanthroline, phen=1,10-phenanthroline; and diimine-€² is either bpy=2,2-€²-bipyridine, Me2bpy=4,4-€²-dimethyl-2,2-€²-bipyridine, 5-Clphen=5-chloro-1,10-phenanthroline, or DPPZ=dipyridophenazine). Chiral capillary electrophoresis and electrospray mass spectrometry were essential aids in determining the presence or absence of diimine ligand scrambling. Utilizing emission and electrochemical data obtained on these compounds, the oxidizing power of the lowest lying excited state (2Eg(Oh)) was calculated, and was found to vary in a systematic fashion with diimine ligand type.

Source Name

Inorganica Chimica Acta

Publication Date

1-1-2007

Volume

360

Issue

10

Page(s)

7602-7607

Document Type

Citation

Citation Type

Article