Controlled pyrolysis of maleic hydrazide

The Fate of Maleic Hydrazide on Tobacco during Smoking

“…Chopra, however, on mathematical grounds, has questioned this implication [ 11 ]. Ninety-four percent of MH is known to degrade into CO 2 , CO, NH, HCN, and so forth [ 12 ]. This result is partly consistent with ours.…”

Pyrolysis of hydrazine derivatives and related compounds with N N single bonds

“…The dialkylamino radicals, formed either thermally or photochemically in solution, can be used as initiators for radical polymerization [177] The reaction of the dimethylamino radical with toluene and substituted toluenes yielded a Hammett value of -1.08 for the abstraction reaction giving R 2 NH and a deuterium isotope effect of 4.0. The rate of the thermal decomposition of tetramethyl-2-tetrazene (TMT) in benzene solution at [126][127][128][129][130][131][132][133][134][135][136][137][138][139][140][141][142] o C were of the order 10 -5 -10 -4 s -1 with an approximate energy of activation of 45 kcal/mol -rather high compared with the gas-phase values given above. Importantly, however, at concentrations of TMT greater than 0.2 M, induced decomposition of the tetrazene becomes important [178].…”

“…Extrusion of HN=NH and formation of a bis-ketene (CH=C=O)2 was proposed, but formation of ketene CH2=C=O has also been reported [140]. The reaction is in need of reinvestigation using modern analytical methods for identification of reactive intermediates.…”