CH activation at the 3-position of pentane chains to form [NC(sp3)N]− complexes incorporating six-membered pallada(II)cyclic rings and pyridine, pyrazole and N-methylimidazole donor groups. Structural studies and comparison with [NC(sp2)N]− complexes
作者:Allan J Canty、Jim Patel、Brian W Skelton、Allan H White
DOI:10.1016/s0022-328x(00)00338-7
日期:2000.8
lithium chloride afford the palladium(II) complexes PdCH(CH2CH2py)2-N,C,N′}Cl (5), PdCH(CH2CH2pz)2-N,C,N′}Cl (6) and PdCH(CH2CH2mim)2-N,C,N′}Cl (7), respectively. Abstraction of chloride from 6 with AgBF4 in acetone generates the cationic acetone complex [PdCH(CH2CH2pz)2-N,C,N′}(OCMe2)][BF4] (8). X-ray crystal structures of 5, 6 and 8 reveal tridentate [NC(sp3)N′]− intramolecular coordination
带有[NC(sp 3)N] -供体基序和两个六元palladacycles的烷基钯配合物是由乙酸钯(II)活化C(sp 3)H键生成的。新试剂1,5-双(吡啶-2-基)戊烷[CH 2(CH 2 CH 2 py)2 ](1),1,5-双(吡唑-1-基)戊烷[CH 2(CH 2 CH 2 pz)2 ](2)和1,5-双(N-甲基咪唑-2-基)戊烷[CH 2(CH 2 CH 2 mim)2 ](3),然后与氯化锂反应,得到钯(II)配合物Pd CH(CH 2 CH 2 py)2 - N,C,N '} Cl(5),Pd CH(CH 2 CH 2 py)2 - N,C,N '} Cl(6)和Pd CH(CH 2 CH 2 mim)2 - N,C,N '} Cl(7)分别。用AgBF 4从6中提取氯离子在丙酮中生成阳离子丙酮络合物[Pd CH(CH 2 CH 2 pz)2 - N,C,N