conjugated butadiene, (Z,Z)-1,4-bis(trimethylstannyl)-1,4-diphenyl-buta-1,3-diene (9). An X-ray structure determination of 9 reveals a symmetrical double-bond Z confirmation. Compound 9 was further characterized by NMR, UV-Vis spectroscopy, and MS. A DFT analysis of model compounds (4a–b, 5a–b, 9) and the experimental and theoretical λmax values from the UV-Vis spectra were also compared. Acetylene and
进行了涉及R 3 SnSnR 3(3a:R = Me; 3b:R = n -Bu )的Pd催化
炔烃(R'–C CH; R'= H,Ph)插入
化学的重新研究。复制了
二苯乙烯模型
乙烯4a–b(Me 3 SnCH CR'SnMe 3)和5a–b((n -Bu )3 SnCH CR'Sn(n -Bu )3),并通过NMR(119 Sn,13 C )进行了进一步表征,1 H)和UV-Vis光谱。在过量的情况下
苯乙炔,化合物4b的二聚化-羰基化生成了新的共轭
丁二烯,(Z,Z)-1,4-双(
三甲基锡烷基)-1,4
-二苯基-丁基-1,3-二烯(9)。X射线结构确定为9时,显示出对称的双键Z确认。通过NMR,UV-Vis光谱和MS进一步表征化合物9。模型化合物(的DFT分析4a-b中,图5A-B ,9)和实验和理论λ最大从紫外-可见光谱的值进行了比较。
乙炔 和
苯乙炔钯催化插入聚[二-(正丁基)
锡烷12的主