Actinide-centered cyclometalation chemistry. An unusually distorted thorium bishydrocarbyl: Thp[η5-(CH3)5C5]2CH2Si(CH3)3]2 |
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| Authors: | Joseph W Bruno Tobin J Marks Victor W Day |
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| Institution: | Department of Chemistry, Northwestern University, Evanston, Illinois 60201 U.S.A.;Department of Chemistry, University of Nebraska, Lincoln, Nebraska, 68588 and Crystalytics Company, Lincoln, Nebraska 68501 U.S.A. |
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| Abstract: | The crystal and molecular structure of the complex Thη5-(CH3)5C5]2CH2-Si(CH3)3]2, which undergoes facile intramolecular cyclometalation to the thoracyclobutane Thη5-(CH3)5C5]2(CH2)2Si(CH3)2, is reported. While the Thη5-(CH3)5C5]2 ligation is unexceptional, the ThCH2Si(CH3)3]2 fragment is highly unsymmetrical having Th-C (corresponding angle Th-C-Si) 2.51(1) Å (132.0(6)°) and 2.46(1) Å (148.0(7)°). This conformation, which appears to result from severe intramolecular non-bonded contacts, allows a methyl hydrogen atom of one CH2Si(CH3)3 ligand to approach within ca. 2.3 Å of the α-carbon atom of the other CH2Si(CH3)3 ligand. |
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| Keywords: | To whom correspondence should be addressed |
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