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Polymers containing formamidine groups, 5 Formation of a cyclic formamidine trimer by the condensation reaction of 2,6‐diaminopyridine with triethyl orthoformate
Author(s) -
Böhme Frank,
Rillich Maik,
Komber Hartmut
Publication year - 1995
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1995.021961011
Subject(s) - trimer , triethyl orthoformate , monomer , chemistry , polymer chemistry , condensation reaction , polymer , condensation polymer , condensation , organic chemistry , dimer , catalysis , physics , thermodynamics
The condensation reactions of the structurally similar monomers 1,3‐phenylenediamine ( 1a ) and 2,6‐diaminopyridine ( 1b ) with triethyl orthoformate have been compared. Whereas the reaction of 1a resulted in an oligomeric polyformamide, a cyclic trimer was obtained almost quantitatively when monomer 1b was used. The structure of the trimer has been discussed with respect to results obtained by NMR and MALDI spectroscopy.