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- W2069577098 abstract "A series of C,C-diacetylenic phosphaalkenes 1b-e has been prepared from 1-chloropenta-1,2-dien-4-ynes 6b-e in a reaction with Mes*PCl(2) (Mes* = 2,4,6-((t)Bu)(3)Ph) in the presence of LDA. Under identical conditions, isomeric butadiyne-substituted phosphaalkenes 2c-f can be obtained from 3-chloropenta-1,4-diynes 5c-f. The title compounds represent rare examples of diethynylethenes in which a constituting methylene has been replaced by a phosphorus center. The formation of both isomers can be rationalized by a common pathway that involves isomeric allenyllithium species. Spectroscopic, electrochemical, and theoretical investigations show that the phosphorus heteroatoms are an intrinsic part of the compounds' pi-systems and lead to decreased HOMO-LUMO gaps compared to those in all-carbon-based reference compounds." @default.
- W2069577098 created "2016-06-24" @default.
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- W2069577098 date "2009-11-13" @default.
- W2069577098 modified "2023-10-13" @default.
- W2069577098 title "<i>C</i>,<i>C</i>-Diacetylenic Phosphaalkenes as Heavy Diethynylethene Analogues" @default.
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- W2069577098 doi "https://doi.org/10.1021/jo901942u" @default.
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