Allylnickel(II) and Allylpalladium(II) Derivatives of [(2-(Diphenylphosphino)ethyl)cyclopentadienyl]tricarbonylmetalates: Reactions with Free Radicals
作者:Paul J. Fischer、Michelle C. Neary、Aaron P. Heerboth、Kevin P. Sullivan
DOI:10.1021/om1006825
日期:2010.10.25
provide 4,4,4-triphenyl-1-butene as the sole allyl ligand coupling product from competitive reactions of phenyl and trityl radicals. However, while phenyl radical attack at the Pd(II) of Pd(η3-allyl)Cl(PPh3) is proposed as the first step in the trityl radical−allyl ligand coupling reaction, direct trityl radical attack at η3-allyl is strongly suggested in 1−3 and 10−12, respectively. A modest heterobimetallic
四腿钢琴凳M'的合成进一步建立了桥接(2-(二苯基膦基)乙基)环戊二烯基(Cp PPh)配体以动力学稳定早期晚期金属-金属键以促进异双金属化合物中新反应的新作用。 M(η 3 -L)}(CO)3(μ-η 5:η 1 -Cp PPH)(M'=铬,钼,W; M =镍,钯; L =烯丙基,2-甲基烯丙基,环己烯基)。配合物1 - 3(M =镍,L =烯丙基)和4 - 6(M =镍,L = 2-甲基烯丙基)与过渡金属-镍(η第一结构表征heterobimetallics 3而烯丙基)单元,7 - 9(M =镍,L =环己烯基)是唯一的结构特征在于过渡金属-镍(η 3环己烯基)络合物。如Pd(η 3 -烯丙基)氯(PPH 3),1 - 3和10 - 12(M =钯,L =烯丙基)分别提供4,4,4-三苯基-1-丁烯作为唯一allyl配位体偶合产物来自苯基和三苯甲基自由基的竞争反应。然而,虽然在加入Pd(η的钯(II)苯基自由基攻击3