697288-93-0Relevant academic research and scientific papers
Synthesis, characterization and ethylene reactivity of 2- diphenylphosphanylbenzamido nickel complexes
Kwon, Heon Yong,Lee, Su Yeon,Lee, Bun Yeoul,Shin, Dong Mok,Chung, Young Keun
, p. 921 - 928 (2007/10/03)
Addition of primary amines to N-[2-(diphenylphosphanyl)benzoyloxy] succinimide affords 2-diphenylphosphanylbenzamides, Ph2PC 6H4C(O)NHR (R = C(CH3)3, 3; R = H, 4; R = CH2CH2CH3, 5; R = CH(CH 3)2, 6). Addition of NiCl(η3-CH 2C6H5)(PMe3) to the deprotonated potassium salts of the amides and subsequent treatment of two equivalents of B(C6F5)3 to the resulting products furnishes η3-benzyl zwitterionic nickel(II) complexes, [Ph 2PC6H4C(O)NR-κ2N,P] Ni(η3-CH2C6H5) (R = C 6H5, 9; R = C(CH3)3,10; R = H, 11; R = CH2CH2CH3, 12; R = CH(CH3) 2, 13). Solid structures of 9, 11, 13 and the intermediate η1-benzyl nickel(II) complexes, [Ph2PC 6H4C(O)NR-κ2N,P]Ni(η1- CH2C6H5)(PMe3) (R = C 6H5, 7; R = C(CH3)3, 8) were determined by X-ray crystallography. When ethylene is added to the η3-benzyl zwitterionic nickel(II) complexes, butene is obtained by the complexes 9-12 but complex 13 provides very high molecular-weight branched polyethylene (Mw, ～1300000) with excellent activity (up to 5200 kg mol-1 h-1 at 100 psi gauge).
