Syntheses, characterization and DFT studies of two new (π-allyl) palladium(II) complexes of β-8,9-dihydrohimachalene
作者:Abdelmajid Faris、Youssef Edder、Ismail Hdoufane、Intissar Ait Lahcen、Mohamed Saadi、Lahcen El Ammari、Moha Berraho、Driss Cherqaoui、Brahim Boualy、Abdallah Karim
DOI:10.1080/00958972.2023.2194013
日期:——
when treated with palladium(II) chloride gives neutral bis(chloro)-bridged cyclopalladated dimers, [Pd2C12(C15H25)2] (di-μ-chloro-bis[(1,2,15-η)-2,6,6,9-tetramethylbicyclo[5.4.0]undeca-1-ene]palladium), with a high regio- and stereoselectivity, which is stable under air and moisture. Its reaction with triphenylphosphine provided a monomer (π-allyl-β-8,9-dihydrohimachalene) palladium(triphenylphosphine)
摘要 β-喜马查烯(阿特拉斯雪松精油的主要成分)的催化氢化导致形成 β-8,9-二氢喜马查烯(2,6,6,9-四甲基双环[5.4.0]undeca-1-ene)。后者用氯化钯 (II) 处理后得到中性双(氯)桥联环钯二聚体,[Pd 2 C1 2 (C 15 H 25 ) 2 ] (di-μ-chloro-bis[(1,2,15 -η)-2,6,6,9-tetramethylbicyclo[5.4.0]undeca-1-ene]palladium),具有高区域选择性和立体选择性,在空气和湿气下稳定。它与三苯基膦反应得到单体(π-烯丙基-β-8,9-二氢喜马查烯)钯(三苯基膦)络合物。两种配合物的特征都是1 H 和13C NMR光谱和单晶X射线衍射。对这两种化合物进行了 DFT 计算,以预测它们的优化结构、前沿分子轨道和全局反应性描述符。在 B3LYP/6-31 +G(d,p) 基组发现了键