报告了一系列[Sn IV BuPh],[Sn IV Bu 2 Ph]和[Sn IV BuPh 2 ]的Mössbauer光谱数据和制备细节]化合物。相对于它们的对称类似物,在这些混合配体络合物中,八面体和三角-双锥体配位中的丁基和苯基的立体化学偏好相对于它们的对称类似物已经进行了研究,并基于我们先前报道的理论和实验进行了比较关于配体部分四极分裂的数据。对于这两种三有机锡的衍生物,报告了中心位移(cs)和四极分裂(qs)参数的趋势,这与可加性模型一致。在比较[SnBu x Ph 3- x ](x = 0、1或2)与PPh 3 O和AsPh的络合物时,qs与元素-氧的拉伸频率之间存在近似的逆相关性。3 O.
C-, N- and C,N-organostannyl tetrazoles: synthesis, characterisation and reactivity
摘要:
Open-chain C,N-organostannyl tetrazoles, R2R'Sn(CH2)nCN4SnBu3 (n = 2 or 3, R2R' = Ph3; n = 2, R2R' = Bu2Ph), have been synthesised by a [3 + 2] cycloaddition reaction between R3Sn(CH2)nCN and SnBu3(N3). Prolonged heating of the reaction mixture yields the novel bicyclic species C,N-R2Sn(CH2)nCN4 (n = 2 or 3, R = Ph; n = 2, R = Bu). The reaction chemistry of both classes of compound has been studied, along with a reinvestigation of the parent 5-organo(N-triorganostannyl)tetrazoles RCN4SnR'3, by C-13 and Sn-119 NMR spectroscopy. The crystal structure of 2,2-diphenyl-1,7,8,9-tetraaza-2-stannabicyclo[4.3.0]nona-6,8-diene has also been determined.