-o -carborane yielding IIa. Migration of palladium(II) is also observed from the compounds with great stability towards acetic acid, namely the [PdCl(η3-allyl)]2 dimers. No such processes except with this particular ligand were found in the case of palladium(II) allyls and other entering ligands (azobenzene, 2-phenylpyridine, α-methylstyrene). The exchange processes described clearly show that complex
1-
二苯基膦基甲基-邻-甲
硼烷,o-HCB10H1OCCH2PPh2(DPMC)与Na2PdCl4(
甲醇)或PdCl2(PhCN)2(苯)反应,生成“双加合物”反式[PdCl2(DPMC)2]在正
丙醇中热解转化为五元PdPCCB
钯环,二-μ-
氯代双[(1-
二苯基膦基甲基-邻碳碳烷基-B,P)
钯(II)](IIa),根据1H和31P NMR分析,它是B(3)和B(4)
金属化异构体的混合物。如果在LiBr或NaI的存在下进行内部触诊,则可获得相应的
溴或
碘桥联的二聚体。配合物IIa也可以通过在
羧酸溶剂中进行
配体交换来制备。特别是,
钯(II)从环
钯的
氯桥联的N,N-二甲基
苄胺或1C-
二苯基膦基-o-碳
硼烷迁移,即从与C,N-五和B,P-四元Palladacycles的配合物迁移 分别制得1-
二苯基膦基甲基-邻-碳
硼烷,得到IIa。还观察到
钯(II)从对
乙酸具有很大稳定性的化合物即[PdCl(η3-烯丙基)]