structures of the tetramethyldihydropyrazoles 1 – 5 have been studied by photoelectron spectroscopy and interpreted with the aid of semi-empirical SCF MO calculations (PM3). Gas-phase pyrolyses of 1 – 5 have been carried out and analysed by photoelectron spectroscopy. Both 1 and 2 and in part 3 eliminate molecular nitrogen to form reactive species which cyclize to three-membered rings, i.e. the novel
所述tetramethyldihydropyrazoles的电子结构1 - 5进行了研究光电子能谱,并用半经验SCF MO计算(PM3)的帮助下解释。进行了1 – 5的气相热解,并通过光电子能谱进行了分析。既1和2和部分3消除分子氮以形成环化成三元环的反应性物质,即,新颖alkylideneselenirane 16中,alkylidenethiirane š氧化物17,而环
丙酮腙19分别在较高的温度下分解。通过IR光谱在10 K的
氩气基质中研究了难以捉摸的亚烷基亚
硒基
乙烷16。