NI(II) phosphine and phosphide complexes supported by a PNP-pyrrole pincer ligand,Dalton Transactions

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NI(II) phosphine and phosphide complexes supported by a PNP-pyrrole pincer ligand
Dalton Transactions ( IF 3.5 ) Pub Date : 2017-08-29 00:00:00 , DOI: 10.1039/c7dt02784b
Julie A. Kessler _{1,

2,

3,

4} , Vlad M. Iluc _{1,

2,

3,

4}

Affiliation

The reaction between [(PN^pyrP)NiCl] (1, PN^pyrP = 2,5-bis((di-iso-propylphosphino)-methyl)-1H-pyrrolide) and TlPF₆ in the presence of a monodentate phosphine ligand led to cationic nickel phosphine and phosphite complexes, [(PN^pyrP)Ni(PHPh₂)][PF₆] (2), [(PN^pyrP)Ni(PMe₃)][PF₆] (3), and [(PN^pyrP)Ni{P(OMe)₃}][PF₆] (4). Compound 2 can be deprotonated resulting in the generation of a terminal phosphido complex, [(PN^pyrP)Ni(PPh₂)] (5). When 3 is subjected to a base, a methyl proton of PMe₃ is abstracted to afford [(PN^pyrP)Ni(CH₂PMe₂)] (6), containing a methylene bridge between Ni and the external phosphine. Compounds 2–6 were characterized by single crystal X-ray diffraction in addition to multi-nuclear NMR spectroscopy and elemental analysis.

中文翻译：

PNP-吡咯夹钳配体支持的NI（II）膦和磷化物配合物

在单齿膦存在下，[（PN ^pyr P）NiCl]（1，PN ^pyr P = 2,5-双（（二异丙基膦基甲基）甲基）-1 H-吡咯化物）与TlPF _6之间的反应配体生成阳离子镍膦和亚磷酸酯络合物，[（PN ^pyr P）Ni（PHPh ₂）] [PF ₆ ]（2），[（PN ^pyr P）Ni（PMe ₃）] [PF ₆ ]（3），和[（PN ^pyr P）Ni {P（OMe）₃ }] [PF ₆ ]（4）。化合物2可以去质子化，从而产生末端的磷酰基络合物[（PN ^pyr P）Ni（PPh ₂）]（5）。当3经受碱处理时，提取PMe ₃的甲基质子，得到[（PN ^pyr P）Ni（CH ₂ PMe ₂）]（6），其在Ni和外部膦之间包含亚甲基桥。除了多核NMR光谱和元素分析外，化合物2–6还通过单晶X射线衍射进行表征。

更新日期：2017-09-20

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