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Benzoannulated Phosphorus–Carbon Four‐Membered Rings
Author(s) -
Heim Udo,
Pritzkow Hans,
Fleischer Ulrich,
Grützmacher Hansjörg
Publication year - 1993
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199313591
Subject(s) - ring (chemistry) , closure (psychology) , phosphorus , carbon fibers , ion , chemistry , base (topology) , crystallography , materials science , organic chemistry , mathematics , mathematical analysis , composite number , economics , market economy , composite material
Electrocyclic ring closure of the methylenephosphonium ion 1 , which is in equilibrium with 2 , leads to the base‐induced formation of 3 with the novel four‐membered ring. Compounds of type 2 are considerably more stable than the corresponding pure hydrocarbons and can thus be isolated and characterized by X‐ray crystallography.