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  Home > JCE Print > Journal of Chemical Education > Issues > 1996  > June  >
Laboratory Experiments
Photochemical Preparation and Radioactivity of cis-Cr(CO)4(CH3CN)2: An Advanced Undergraduate Inorganic Laboratory Experiment
Timothy J. McNeese and Karin A. Ezbiansky
Loyola College, Baltimore, MD 21210
Cover
June 1996
Vol. 73 No. 6
p. 548
Abstract
The photochemical synthesis of a disubstituted complex, cis-Cr(CO)4(CH3CN)2, by reaction of the parent metal carbonyl, Cr(CO)6, in acetonitrile solution is reported. Subsequent reaction of this intermediate with mono- and bidentate phosphine ligands, triphenylphosphine (PPh3) and bis(diphenylphosphino)methane, Ph2PCH2PPh2 (dppm), yields the geometric isomers, trans-Cr(CO)4(PPh3)2 and cis-Cr(CO)4(dppm), respectively. The experiment employs laboratory techniques commonly used in organometallic chemistry. Dry solvent purification, vacuum-line techniques, inert atmosphere photochemical methods and infrared spectroscopic analysis are required for the preparation, handling and characterization of these compounds.
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*  Citation
 Timothy J. McNeese and Karin A. Ezbiansky. J. Chem. Educ. 1996 73 548.
*  Keywords
*  History
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Last Updated:		 9/23/1999
5/22/2006
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