Studies of ring opening of chlorocyclotrigermazanes in cycloaddition reactions with the nitrones phenyl- and tert-butylbenzylideneamine N-oxide, catalysed by Lewis bases (HMPA) or Lewis acids (ZnCl2; M(CO)6; M(CO)5·THF, M = Cr, W), show that hexachlorocyclotrigermazanes are much less reactive than the corresponding methylcyclogermazane. The decreased reactivity is attributed to the tendency of the
与硝酮苯基和环加成反应chlorocyclotrigermazanes的开环的研究叔-butylbenzylideneamine的N-氧化物,通过催化的路易斯碱(HMPA)或路易斯(酸的ZnCl 2 M(CO); 6 ; M(CO)5 ·THF, M = Cr,W),表明六氯环三germazanes比相应的甲基环germazane低得多的反应性。反应性降低归因于吸引电子的
氯原子趋向于促进电子从氮向
锗的“反向捐赠”,从而使Ge-N键的极性降低,因此不易配位(或者与
路易斯酸或刘易斯 碱)和极性试剂(例如羰基化合物)的攻击。