Pyrrole-Based New Diphosphines: Pd and Ni Complexes Bearing the PNP Pincer Ligand
作者:Shanish Kumar、Ganesan Mani、Sukanta Mondal、Pratim Kumar Chattaraj
DOI:10.1021/ic301967r
日期:2012.11.19
formation of complex 12 is solvent dependent, which transforms into complex 10 in CDCl3 as studied by variable temperature 1H and 31P NMR methods. Treatment of 2 with [Ni(OAc)2]·4H2O gave the mononuclear Ni(II) pincer complex [Ni(OAc)C4H2N-2,5-(CH2PPh2)2-κ3PNP}], 13, which upon treatment with an excess of LiCl or LiBr or KI afforded the respective halide ion substituted Ni(II) complexes, [NiXC4H2N-2
通过Ph 2 PH与2,5-双(二甲基氨基甲基)吡咯的反应合成了新型的二膦PNP钳型配体2,5-双(二苯基膦甲基)吡咯2,产率为90%。Ph 2 PH与1,9-双(二甲基氨基甲基)二苯基二吡咯基甲烷的类似反应容易地以92%的收率得到PNNP型二膦配体,1,9-双(二苯基膦甲基)二苯基二吡咯基甲烷5。这些膦化合物被H 2 O 2和S 8氧化,以非常好的收率得到相应的磷酰基和硫代磷酰基化合物6 – 9。PNP夹钳配体2的反应与[的PdCl 2(PHCN)2 ]中的的Et存在下3 Ñ得到单核的Pd(II)配合物,[的PdClÇ 4 ħ 2的N- 2,5-(CH 2 PPH 2)2 -κ 3 PNP } ] 10产率为87%。相反,治疗的2与[的PdCl 2(PHCN)2 ]在没有的Et 3 Ñ得到双核的Pd(II)配合物[钯2氯4 μ-C 4 H ^ 3的N- 2,5-(CH 2 PPH 2)2