Macromolecular Rapid Communications, Vol.17, No.10, 723-730, 1996
Polymeric mesoions .3. Synthesis of polymeric mesoionic 1,3-diazinium-olates via polymer analogous modification of a polythiourea from m-phenylenediamine and p-phenylene diisothiocyanate
Mesoionic poly(1,1'-(1,3-phenylene)-3,3'-(1,4-phenylene)-bis(5-decyl-2-decylthio-4 ,6-dioxo-1,3-diazine)) (6) was prepared by cyclisation of the isothiourea component of poly(1,1'-(1,3-phenylene)-3,3'-(1,4-phenylene)-bis(2-decylisothiourea)) (4) with decylmalonic acid (5) by use of dicyclohexylcarbodiimide (DCC). Polymer 4 was obtained by polymer analogous alkylation of poly(1,1'-(1,3-phenylene)-3,3'-(1,4-phenlene)-bisthiourea) (3). For comparison of spectroscopic data, 5-butyl-2-propylthio-4,6-dioxo-1,3-diphenyl-1,3-diazine (9) was synthesized as low molecular weight model compound.