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Please login to access the full content or check if you have access via Method 4: Titanium–Cyclobutadiene Complexes by Reaction between Titanium–Arene Complexes and Alkynes

DOI: 10.1055/sos-SD-002-00576

Mikami, K.; Matsumoto, Y.; Shiono, T.Science of Synthesis, (20032535.

Reaction of titaniumaluminum complex 1 (arene=toluene) with disubstituted alkynes gives cyclobutadiene complexes 165 (Scheme 84).[‌304‌] The crystal structure of one of these complexes has been determined. The tetrabromoaluminato moiety can be substituted by reaction with dipotassium cyclooctatetraene to give [Ti(η4-C4Ph4)(η4-cot)], and with cyclopentadienylthallium to give the titanacyclopentadiene complex [Ti(Cp)2(η2-C4Ph4)].[‌304‌]

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