Mono(dinitrogen) and Carbon Monoxide Adducts of Bis(cyclopentadienyl) Titanium Sandwiches

J. Am. Chem. Soc., 128 (18), 6018 -6019, 2006. 10.1021/ja061213c S0002-7863(06)01213-3
Web Release Date: April 15, 2006

Mono(dinitrogen) and Carbon Monoxide Adducts of Bis(cyclopentadienyl) Titanium Sandwiches

Tamara E. Hanna, Emil Lobkovsky, and Paul J. Chirik*

Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853

pc92@cornell.edu

Received February 20, 2006

Abstract:

The silyl-substituted titanocene complex, (⁵-C₅Me₄SiMe₂Ph)₂Ti, coordinates dinitrogen upon cooling to -35 C to yield an unprecedented example of a mono(dinitrogen) complex of a substituted bis(cyclopentadienyl) titanium compound, (⁵-C₅Me₄SiMe₂Ph)₂Ti(N₂). Analogous monocarbonyl derivatives, (⁵-C₅Me₄R)₂Ti(CO) (R = SiMe₃, SiMe₂Ph, CHMe₂), have been prepared by mixing the dicarbonyl compounds with the corresponding sandwiches. Both (⁵-C₅Me₄SiMe₂Ph)₂Ti(N₂) and (⁵-C₅Me₄SiMe₂Ph)₂Ti(CO) have been characterized by X-ray diffraction, and mixed N₂-CO titanocene complexes have also been observed by in situ IR spectroscopy.

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