Treatment of 1-PiPr2-indene or 1-PiPr2-2-NMe2-indene (1a) with elemental sulfur afforded 3-iPr2P(S)-indene or 1-iPr2P(S)-2-NMe2-indene (4a) in 81% and 85% isolated yield, respectively. Addition of 4a to [(COD)M(THF)2]+BF4- afforded the corresponding [(COD)M(kappa2-N,S-4a)]+BF4- complexes (M = Rh, 5a, 76%; M = Ir, 5b, 59%; COD = eta4-1,5-cyclooctadiene), which were found to exhibit temperature-dependent
用元素
硫处理1-PiPr2-
茚或1-PiPr2-2-NMe2-
茚(1a)在81中得到3-iPr2P(S)-
茚或1-iPr2P(S)-2-NMe2-
茚(4a) %和85%的分离产率。向[(COD)M(THF)2] +
BF4-添加4a,得到相应的[(COD)M(kappa2-N,S-4a)] + -复合物(M = Rh,5a,76%; M = Ir,5b,59%; COD = eta4-1,5-
环辛二烯),发现它们显示出随温度变化的NMR光谱特征,该特征根据涉及M-NMe 2离解的动态过程,围绕
茚基-的旋转而合理化。 NMe2键,在氮上反转并重新配位为M。对5a和5b收集的可变温度NMR数据进行分析后,得出的DeltaG(双匕首)的值为ca。该过程为14 kcal / mol。5a或5b暴露于NaN(SiMe3)2会生成相应的(COD)M(kappa2-C,S-1-iPr2P(S)-2-NMe2-(C1-茚基))配合物(M