1-diorganopentaphosphido ligands. The mechanism of formation of these species has been studied by 31P1H} NMR spectroscopy and DFT calculations. In the case of 3a (R = iPr), it was possible to identify the intermediate [(MesBIAN)Co(μ-η4:η2-P5iPr2)Ga(nacnac)] (4) by single-crystal X-ray diffraction. A related, monosubstituted organopentaphosphido cobalt complex [(MesBIAN)Co(μ-η4:η1-P5tBu)GaCl(nacnac)] (5)
稀有的单和二有机五
磷钴配合物可通过 P-P 缩合使用前所未有的反应性
钴-
镓四
磷配合物 [K(dme) 2 ( Mes BIAN)Co(μ-η 4 :η 2 -P 4 )Ga( nacnac)}] ( 2 )。[K(Et 2 O)( Mes BIAN)Co(η 4 -1,5-cod)}] [ 1 , BIAN = bis(mesitylimino)acenaphthene diimine, cod = 1反应制备化合物2,收率良好,5-
环辛二烯] 与 [Ga(nacnac)(η 2 -P 4 )] (nacnac = CH[CMeN(2,6-iPr 2 C 6 H 3)] 2 )。与 R 2
PCl (R = iPr, t Bu, and Cy) 反应选择性地得到 [( Mes BIAN)Co( cyclo -P 5 R 2 )] ( 3a–c ),其特征为 η 4 -配位的 1,1-d