13C) n.m.r. spectroscopy over a temperature range of –90 to 25 °C. With Me2AsNMe2, a N–B bonded adduct is formed at low temperature, which decomposes at 25 °C to yield (Me2NBH2)2, Me2NH·BH3, µ-Me2NB2H5, and Me2AsAsMe2. Equimolar amounts of As–B and N–B adducts are formed at low temperature when Me2AsNEt2 is reacted with BH3·thf. With increasing temperature, the As–B adduct converts to the N–B adduct,
已根据温度进行BH 3 ·thf(thf =
四氢呋喃)与选定的(二烷基
氨基)二甲基ar啶,Me 2 AsNR 2(R = Me,Et,Pr n或Pr i)的反应,以确定初始温度
硼的配位位置,并阐明溶液中任何As–N,As–B和N–B键解离/形成过程的性质。通过多核(1 H,11 B和13 C)核磁共振波谱法在–90至25°C的温度范围内监控反应。使用Me 2 AsNMe 2时,在低温下形成N–B键加合物,在25°C时分解,生成(Me 2NBH 2)2,Me 2 NH·BH 3,µ-Me 2 NB 2 H 5和Me 2 AsAsMe 2。当Me 2 AsNEt 2与BH 3 ·thf反应时,在低温下会形成等摩尔量的As–B和N–B加合物。随着温度的升高,As-B加合物转化为N-B加合物,随后在室温下分解为µ-Et 2 NB 2 H 5,Et 2 NH·BH 3,(Et 2 NBH 2)2和Me2