Polynuclear Complexes with Propynylidene C3-Bridges: General Synthetic Route to Bis-, Tris-, and Tetrakis(ethynylcarbene) Complexes
作者:Cornelia Hartbaum、Gerhard Roth、Helmut Fischer
DOI:10.1002/(sici)1099-0682(199802)1998:2<191::aid-ejic191>3.0.co;2-t
日期:1998.2
complexes [(CO)5M=C(NMe2)C≡CH] [M = W (1a), Cr (1b)] with two equivalents of nBuLi and one equivalent of a transition metal dichloride, [Cl2M′(Ln)], affords trinuclear biscarbene complexes of the type [(CO)5M=C(NMe2)C≡C−M′(Ln)−C≡CC(NMe)2=M(CO)5] [M′(Ln) = Ni(PEt3)2 (2a, b), Pd(PEt3)2 (3a, b), Pt(PEt3)2 (4a, b), Fe(dmpe)2 (6a), Hg (8a), Ti(η5-C5H5)2 (9a, b)] [dmpe = 1,2-bis(dimethylphosphino)ethane]. Treatment
两当量的二甲氨基(乙炔基)卡宾配合物 [(CO)5M=C(NMe2)C≡CH] [M = W (1a), Cr (1b)] 与两当量的 nBuLi 和一当量的过渡金属二氯化物 [Cl2M'(Ln)],提供 [(CO)5M=C(NMe2)C≡C-M'(Ln)-C≡CC(NMe)2=M( CO)5] [M'(Ln) = Ni(PEt3)2 (2a, b), Pd(PEt3)2 (3a, b), Pt(PEt3)2 (4a, b), Fe(dmpe)2 ( 6a), Hg (8a), Ti(η5-C5H5)2 (9a, b)] [dmpe = 1,2-双(二甲基膦基)乙烷]。用等摩尔量的第一个 nBuLi 然后 [Cl2M'(Ln)] 处理 1a 导致形成单取代产物 [(CO)5W=C(NMe2)C≡CM'(Ln)] [M'(Ln) = 反式 Pd(PEt3)2Cl (5a),反式 Fe(dmpe)2Cl