contrast to the reaction of 3a with [PdCl2(PEt3)2], that of 3a with the platinum complex [PtCl2(PPh3)2] gives cis- and trans-[(PPh3)2Pt(−C≡CC═O}NMe2)2] (8a (cis) and 9a (trans)), depending on the reaction conditions and, upon subsequent alkylation with MeOTf, the cis and trans isomers of the first allenylidene platinum complexes, cis- and trans-[(PPh3)2Pt═C═C═C(OMe)NMe2}2]2+2OTf−.
反式-双(炔基)
钯配合物,反式-[(PEt 3)2 Pd(-C≡CC= O} NR 2)2 ](NR 2 = NMe 2(2a),N(CH 2)4(2b))的合成方法有两种:(a)在碱性条件下通过
铜催化HC≡CC(= O)NR 2与[PdCl 2(PEt 3)2 ]的反应,以及(b)通过处理HC≡CC (═O)NR 2与AgNO 3,然后炔基
配体从
银到[PdCl 2(PEt3)2 ]。AgC≡CC(= O)NME的反应2(图3a)与反式- [BR(P我
镨3)2 PdC≡CC(= O)N(CH 2)4 ](5)得到的复合物含有两种不同炔基
配体,反式-[(P i Pr 3)2 Pd -C≡CC(= O)NMe 2 } -C≡CC(= O)N(CH 2)4 }](6)。用MeOTf或[Me 3 O] BF将2a,b和6甲基化4倍的产率
钯双阳离子bisallenylidene络合物,反式- [(PET