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The novel [Ni{(Ph 2 P) 2 N(CH 2 ) 3 Si(OCH 3 ) 3 - P , P´ }I 2 ] complex ( 1 ) was synthesized and investigated by a variety of spectroscopic methods (IR,  1 H and  31 P NMR). The molecular structure of  1 , determined by single crystal X-ray diffraction, was compared with those of the analogue [Ni{(Ph 2 P) 2 N(CH 2 ) 3 Si(OCH 3 ) 3 - P , P´ }Cl 2 ] complex ( 2 ) and the recently reported [Ni{ i CPrP) 2 NH- P , P´ }I 2 ] complex. Complexes  1  and  2  were tested as homogeneous catalysts for the oligomerization of ethylene, leading to the formation of C 4  and, to a smaller extent, C 6  products, in moderate yields.

open chemistry

The novel [Ni{(Ph 2 P) 2 N(CH 2 ) 3 Si(OCH 3 ) 3 - P , P´ }I 2 ] complex: Structural features and catalytic reactivity in the oligomerization of ethylene