Competing Germene and Germylene Extrusion from Photolysis of 1,1-Diarylgermacyclobutanes. Substituent Effects on Germene Reactivity
作者:William J. Leigh、Gregory D. Potter、Lawrence A. Huck、Adroha Bhattacharya
DOI:10.1021/om800574s
日期:2008.11.24
the order 2 > 4 > 5. As was reported previously for 2, laser flash photolysis of 4 and 5 in hexane, acetonitrile, or tetrahydrofuran solution allows the detection of the corresponding transient 1,1-diarylgermenes (6 and 7, respectively), which have been identified on the basis of their UV/vis spectra (λmax ∼325 nm) and quenching studies with MeOH, tert-butyl alcohol (t-BuOH), acetic acid (AcOH), n-butylamine
和1,1-双[3,5-双(三氟甲基)苯基] germacyclobutanes( - 1,1-二苯基- ,1,1-双[4-(三氟甲基)苯基]直接照射2,4,和5分别在甲醇的C 6 D 12溶液中提供的产品与相应的1,1-二芳基锗烷和二芳基锗烯以及乙烯和环丙烷的竞争形成相一致。两种含Ge的初级产物(锗烯:亚锗烯)的相对产率随芳环上CF 3取代程度的变化而变化,顺序为2 > 4 > 5。如先前关于2的报道,己烷,乙腈或四氢呋喃溶液中的4和5可以检测相应的瞬时1,1,1-二芳基锗烷(分别为6和7),已根据它们的UV / vis光谱(λmax〜325 nm)进行了鉴定)并用MeOH,叔丁醇(t- BuOH),乙酸(AcOH),正丁胺(n- BuNH 2)和丙酮进行淬灭研究。在小心干燥的己烷溶液中,还观察到可赋予相应的亚二甲基苯及其各自的(二茂铁)二聚体弱的瞬态吸收。在5的情况下,这些分配已经通过1