The Mechanism of the Dötz Reaction: Chromacyclobutenes by Alkyne–Carbene Coupling?
1989; Wiley; Volume: 28; Issue: 7 Linguagem: Inglês
10.1002/anie.198909081
ISSN1521-3773
AutoresPeter Hofmann, Martin Hämmerle,
Tópico(s)Organometallic Complex Synthesis and Catalysis
ResumoChromacyclobutenes 2, which have been postulated as intermediates on several occasions, are unrealistic structures with incomplete electron shells and high energy. According to model calculations vinylcarbene complexes 3/4 are much more stable isomers and can be formed almost without activation energy from alkyne-carbene complexes 1. The different modes of coordination of the structure continuum 1–6 can be interpreted and predicted as a function of the metal complex MLn.
Referência(s)