用氨基氮-15同位素示踪原子法研究黑索今的生成反应机理

NITROGEN-15 TRACER STUDIES OF THE MECHANISM OF FORMATION OF RDX

~(15)NH_4NO_3 was used to prepare RDX by means of improved Hale process, one step-K process and two step-K process, the RDX formed was analyzed for the contents and the numbers of ~(15)N by mass spectrometry. The results showed that the contents and the numbers of ~(15)N in the RDX formed from the above three processes were different, and that the amino nitrogens from HA and NH_4NO_3 were not chemically equivalent in the K process. Four isomers of ~(15)N labelled RDX were formed in the one step K process which indicated that the intermediates forming RDX were composed of various kinds of open-chain methylenenitramines. Although the amounts of the various open-chain methylenenitramines were different, depending on the prevailing conditions, the open-chain methylenenitramines must have undergone the similar mechanism to form RDX in the Hale process and K process.