Dimethyl acetylenedicarboxylate (RC2R) reacted with the zerovalent dibenzylideneacetone (dba) palladium complexes to give the palladacyclopentadiene, [Pd(C4R4)]n, characterised as the adducts Pd(C4R4)L2[L = Ph3P, (PhO)3P, p-toluidine; L2= Ph2PCH2CH2PPh2, bipy and phen]. [Pd(C4R4)]n reacted with bromine to give Br(CR)4Br, with air and Pd(PhCN)2Cl2 to give the furan R4C4O, and with acetylenes R′C2R′to
乙炔二
甲酸二甲酯(RC 2 R)与零价的
二亚苄基丙酮(dba)
钯络合物反应,制得Palladacyclopentadiene [Pd(C 4 R 4)] n,其特征为加合物Pd(C 4 R 4)L 2 [L = Ph 3 P,(PhO)3 P,对甲
苯胺;L 2= Ph 2 PCH 2 CH 2 PPh 2,bipy和phen]。[Pd(C 4 R 4)] n与
溴反应生成Br(CR)4 Br,与空气和Pd(PhCN)2
氯2,得到
呋喃- [R 4 Ç 4 O,并用
乙炔R'C 2 R'to得到的苯- [R 4 R' 2 Ç 6(R'= COOMe或PH)。
铂类似物[Pt(C 4 R 4)] n也已被检测到,并被表征为[Pt(C 4 R 4)(Ph 3 P) 2 ]。讨论了
金属
环戊二烯和苯的形成机理。