Synthesis and reactivity of tantalum and tungsten alkyne complexes: Models for alkyne cyclization.
Intermediates in the cyclization reaction of alkynes have been isolated using the group 5 tantalum phenoxide reagents, Ta(DIPP)₂Cl₃(OEt₂) and Ta(DIPP)₃Cl₂(OEt₂) (DIPP = O-2,6-C₆H₃-i-Pr₂). The extent of cyclization has been effected by controlling the sterics at the metal center or the alkyne itself....
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| Language: | en |
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The University of Arizona.
1990
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| Online Access: | http://hdl.handle.net/10150/185228 |