Abstract
The synthesis of the chelating polymethylcyclopentadienyl ligand (CH3)2Si[(CH3)4C5] 22- is reported. Reaction with ThCl4 followed by alkylation yields the new, thermally stable thorium hydrocarbyls (CH3)2Si[(CH3)4C5] 2ThR2, R = n-C4H9, CH2C(CH3)3, CH2Si(CH3)3, CH2C6H5, and C6H5. The R = CH2Si(CH3)3 complex has also been characterized by single-crystal X-ray diffraction. The most unusual feature of the molecular structure is the rather small (ring center of gravity)-Th-(ring center of gravity) angle of 118.4° and the rather large ring-ring dihedral angle of 105.4°. The hydrocarbyls undergo facile hydrogenolysis to yield the new thorium hydride {(CH3)2Si[(CH3)4C5] 2ThH2}x. The infrared spectrum of this hydride lacks terminal Th-H stretching transitions. The new hydride catalyzes olefin hydrogenation at turnover frequencies significantly in excess of those for {Th [(CH3)5C5]2H2} 2.
Original language | English |
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Pages (from-to) | 819-821 |
Number of pages | 3 |
Journal | Organometallics |
Volume | 3 |
Issue number | 5 |
Publication status | Published - 1984 |
ASJC Scopus subject areas
- Inorganic Chemistry
- Organic Chemistry