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Cyclophosphazene Metal Oxides, a New Class of Compounds, and Model Compounds for the Polymerization of Phosphazenes
Author(s) -
Hasselbring Reinhard,
Roesky Herbert W.,
Noltemeyer Mathias
Publication year - 1992
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.199206011
Subject(s) - siloxane , polymerization , phosphazene , metal , isocyanate , chemistry , polymer chemistry , oxide , organic chemistry , polymer , polyurethane
The acyclic, completely N ‐silylated phosphazene 1 reacts with Re 2 O 7 to form the first cyclophosphazene metal oxide 2 on elimination of siloxane. With 2,6‐diisopropylphenyl isocyanate, 2 is transformed into a mixture of novel cyclophosphazene metal imides. The formation of a twelve‐membered N 6 P 4 Re 2 heterocycle in the process is particularly interesting, especially with regard to mechanistic aspects of the polymerization of phosphazenes.