E Polymeric Pyrazaboles

Three representatives of polymeric pyrazaboles have been described The first two were obtained when 4,4 -methylenedipyrazole was reacted with triethylborane or trimethylamine-borane, respectively, to yield species of type 13. 

Both polymers (of undetermined chain length) were found to be thermally stable. An analogous species, 14, was synthesized from 3,5,3, 5 -tetramethyl-l,4-xylene-4,4 -dipyrazole. This polymer softens above 360 °C. 

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