Cycloaddition Reactions of the Titanium Imide [Ti(NBut){MeC(2-C5H4N)(CH2NSiMe3)2}(py)] with ButCP and MeCN

• Published in: Organometallics Vol. 19; no. 16; pp. 3205 - 3210
• Main Authors: Pugh, Stephen M, Trösch, Dominique J. M, Wilson, D. James, Bashall, Alan, Cloke, F. Geoffrey N, Gade, Lutz H, Hitchcock, Peter B, McPartlin, Mary, Nixon, John F, Mountford, Philip
• Format: Journal Article
• Language: English
• Published: American Chemical Society 07.08.2000
• ISSN: 0276-7333; 1520-6041
• DOI: 10.1021/om000264u

The diamidopyridine-supported titanium imide [Ti(NBut)(L)(py)] [1, L = MeC(2- C5H4N)(CH2NSiMe3)2] undergoes a [2+2] cycloaddition reaction with ButCP to form the mononuclear product [Ti{N(But)PC(But)}(L)] (2). In contrast, reaction of 1 with MeCN affords the binuclear derivative [Ti2{μ-η2-NC(Me)NBut}2(L)2] (3), which contains a doubly deprotonated N-tert-butylacetamidinate ligand. Compound 3 undergoes a quantitative cycloreversion reaction at elevated temperatures yielding MeCN and [Ti(NBut)(L)] (4).