Synthesis and Reactions of Nickel(0) η<sup>2</sup>-Cyclohexyne Complexes and X-ray Crystal Structure of Ni(η<sup>2</sup>-C<sub>6</sub>H<sub>8</sub>)((C<sub>6</sub>H<sub>11</sub>)<sub>2</sub>PCH<sub>2</sub>CH<sub>2</sub>P(C<sub>6</sub>H<sub>11</sub>)<sub>2</sub>)
作者:Martin A. Bennett、Julian A. Johnson、Anthony C. Willis
DOI:10.1021/om9504516
日期:1996.1.9
sodium amalgam in the presence of Ni(η2-C2H4)L2 gives cyclohexyne nickel(0) complexes Ni(η2-C6H8)L2 [L2 = 2PPh3 (1), dcpe (2), 2PEt3 (3); dcpe = 1,2-bis(dicyclohexylphosphino)ethane, Cy2PCH2CH2PCy2], which are structurally similar to, but less stable than, the corresponding platinum(0) compounds. The crystal structure of 2 has been determined. The molecule contains a nickel atom bound to η2-cyclohexyne
在Ni的存在1%钠汞齐1,2- dibromocyclohexene的减少(η 2 -C 2 H ^ 4)L- 2给出cyclohexyne镍(0)络合物的Ni(η 2 -C 6 H ^ 8)L- 2 [L 2 = 2PPh 3(1),dcpe(2),2PEt 3(3); dcpe = 1,2-双(二环己基膦基)乙烷,Cy 2 PCH 2 CH 2 PCy 2 ],其结构类似于相应的Platinum(0)化合物,但稳定性较差。的晶体结构2已确定。分子中含有结合到η镍原子2 -cyclohexyne [Ni基C(1)= 1.875(4),镍- C(2)= 1.867(4)]并DCPE [镀Ni-P(1)= 2.139(1)Å,Ni-P(2)= 2.138(1)Å]。几何形状是接近三角平面如果协调三键的中点被视为占据一个配位位置,而C的距离c [1.272(5)]比在铂(略少η 2 -C 6