Campus Units

Chemistry, Ames Laboratory

Document Type

Article

Publication Version

Accepted Manuscript

Publication Date

4-24-2014

Journal or Book Title

Dalton Transactions

Volume

43

Issue

23

First Page

8644

Last Page

8653

DOI

10.1039/C4DT00658E

Abstract

Azasilazirconacycle Cp2Zr{κ2-N(SiHMe2)SiHMeCH2} (1) and formaldehyde react through an uncatalyzed addition reaction (hydrosilylation) to form an exocyclic methoxysilyl-substituted zirconacycle. Although 1 contains 2-center-2-electron SiH groups, this transformation parallels the reactions of non-classical [Cp2ZrN(SiHMe2)2]+ ([2]+) with carbonyls. Reactions of 1 with a series of nucleophilic and electrophilic agents were explored, as well as reactions of related β-SiH-containing silazidozirconium compounds, to develop a rationale for the unexpected hydrosilylation. For example, carbon monoxide and 1 react at the Zr–C bond to form Cp2Zr{κ2-OC(CH2)SiHMeN(SiHMe2)} (7). The Lewis acid B(C6F5)3 also reacts at the Zr–C bond to give Cp2Zr{N(SiHMe2)SiHMeCH2B(C6F5)3} (8). OPEt3 and N,N-dimethylaminopyridine (DMAP) do not appear to interact with 1. In contrast, OPEt3 and DMAP react with non-classical compounds [2]+ and zwitterionic 8.

Comments

This is a manuscript of an article published as Yan, KaKing, Aradhana Pindwal, Arkady Ellern, and Aaron D. Sadow. "Direct hydrosilylation by a zirconacycle with β-hydrogen." Dalton Transactions 43, no. 23 (2014): 8644-8653. DOI: 10.1039/C4DT00658E. Posted with permission.

Copyright Owner

The Royal Society of Chemistry

Language

en

File Format

application/pdf

Published Version

Included in

Chemistry Commons

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