J. Hurtado, J. Ugarte, René S. Rojas
Nov 30, 2011
Citations
0
Influential Citations
9
Citations
Journal
Inorganica Chimica Acta
Abstract
Abstract Reaction of 2,6-pyridinedicarbonyl dichloride with 3,5-dimethylpyrazole and 1 H -indazole, respectively, yield the tridentate ligands 2,6-bis(3,5-dimethylpyrazol-1-ylcarbonyl)pyridine ( 1 ) and 2,6-bis(indazol-1-ylcarbonyl)pyridine ( 2 ). The molecular structure of the new compound ( 2 ) was determined by single-crystal X-ray diffraction. These ligands react with CrCl 3 (THF) 3 in THF to form neutral complexes of general formula [CrCl 3 {2,6-bis(azolylcarbonyl)pyridine- N , N , N }] ( 3 , 4 ) which were isolated in high yield as air stable green solids and characterized by elemental analysis, magnetic moment, IR, and mass spectroscopies. Theoretical calculations predict that the thermodynamically preferred structure of the complexes is the fac configuration. After reaction with methylaluminoxane (MAO) the chromium(III) complexes are active for the polymerization of ethylene.