Direct detection of methylphenylgermylene and 1,2-dimethyl-1,2-diphenyldigermene — Kinetic studies of their reactivities in solution
作者:William J Leigh、Ileana G Dumbrava、Farahnaz Lollmahomed
DOI:10.1139/v06-107
日期:2006.7.1
con- comitant growth of a second longer-lived transient (λmax = 420 nm) that is assigned to a mixture of (E)- and (Z)-1,2- dimethyl-1,2-diphenyldigermene (4). Absolute rate constants have been determined for the reactions of the germylene with primary and tertiary amines (n-BuNH2 and Et3N, respectively), acetic acid (AcOH), a terminal alkyne and alkene, isoprene, DMB, CCl4, and the group 14 hydrides
1,3,4-trimethyl-1-phenylgermacyclopent-3-ene (5) 在含有异戊二烯、甲醇或乙酸的烃溶剂中的光解得到 2,3-二甲基-1,3-丁二烯 (DMB) 和预期的捕集甲基苯基锗烯 (GeMePh) 的化学产率超过 90%。已通过激光闪光光解在己烷溶液中检测到锗烯是一种短寿命物质 (τ 2 µs),其 UV-vis 吸收光谱以 λmax = 490 nm 为中心。它以二级动力学和接近扩散控制极限的速率常数衰减,伴随着第二个更长寿命的瞬态(λmax = 420 nm)的增长,该瞬态分配给(E)-和(Z)-1,2-二甲基-1,2-二苯基二萜(4)。已经确定了锗烯与伯胺和叔胺(n-BuNH2 和 Et3N,分别)、乙酸 (AcOH)、末端炔烃和烯烃、异戊二烯、DMB、CCl4 和第 14 族氢化物 Et3SiH 和 Bu3SnH。GeMePh 对本工作中研究的所有试剂的反应性略高于