College of Humanities, Arts and Natural Sciences
Department of Chemistry
Phone: (319) 273-7898
Office: MSH 3753
Fax: (319) 273-7127
Email: martin.chin at uni.edu
Inorganic and Organometallic Chemistry
We are currently interested in using doubly linked cyclopentadienyl ligands to hold two metal centers next to each other. The resulting dinuclear complexes will be tested as catalysts for small molecule activation and functionalization.
The preferred metal is ruthenium with rhodium and iridium making occasional guest appearances. We have been able to prepare a series of ruthenium complexes as shown below.
The reaction was initially performed in the converted domestic microwave oven connected to a pressure transducer and control system to prevent overpressurization of the reaction vessel. Crude but effective.
We have now gone big city and the reaction is now performed in a CEM Discover microwave, shown on the right. A huge step up in performace.
Reaction with LiAlH4 yields the corresponding bisdienyl complex.
Protonation with HOTf yields the hexakisacetonitrile complex.
Dialkylation of a Doubly Linked Dicyclopentadiene
Ligand and the Resulting Ruthenium Complexes” Fier,
P. F.; Reinig, R. R.; King, J.; Dickerson, C.; Doucoure, M.; Brennessel, W. Organometallics, 2012, 31, 261-267.
“Syntheses and Characterization of Ruthenium Complexes Containing a Doubly Linked Dicyclopentadienyl Ligand and Acetonitrile Ligands” Chin, R. M.; Simonson, A.; Mauldin, J.; Criswell, J.; Brennessel, W. Organometallics, 2010, 29(17), 3868-3875. http://dx.doi.org/10.1021/om100566w
“Syntheses and characterization of iridium and rhodium complexes containing a doubly linked cyclopentadienyl ligand” Chin, R. M.; Maurer, D.; Parr, M.; Allworth, N.; Schwenker, R.; Sullivan, D.; Enabnit, S.; Brennessel, W. Inorganica Chimica Acta , 2009, 389-394. http://dx.doi.org/10.1016/j.ica.2008.04.025