435269-16-2Relevant academic research and scientific papers
Synthesis of cobalt(II) and iron(II) complexes with the ligand bis(2-diphenylphosphinoethyl)methylamine and their catalytic action on ethylene oligomerization. X-ray crystal structure of
Wang, Mei,Yu, Xiaomin,Shi, Zhan,Qian, Mingxing,Jin, Kun,Chen, Jiesheng,He, Ren
, p. 127 - 133 (2002)
Complexes [MCl2{CH3N(CH2CH2PPh2)2}] (1, M = Co; 2, Fe) were prepared by a modified procedure. The X-ray structural determination of 1 reveals that the cobalt(II) complex is four-coordinate with a distorted tetrahedral coordination geometry. The tertiary amine CH3N(CH2CH2PPh2)2 acts as a bidentate ligand through two phosphorus atoms. The Co-P distances of 2.3666(14) and 2.3731(15) ? found in 1 are significantly longer than general Co-P bond lengths. The incoordinate N atom of the ligand locates at the apical position trans to one of the chlorides. The catalytic properties of 1 and 2 in combination with ethylaluminoxane (EAO) as cocatalyst for ethylene oligomerization were studied. The activities of 89.4 kg oligomers mol-1 Co h-1 for 1 and 81.2 kg oligomers mol -1 Fe h -1 for 2 (100 equivalents of EAO, 180 °C and 1.8 MPa ethylene) were observed with high selectivity to linear C4-10 olefins.
