长链烷基二苯基膦-铑配合物催化烯烃氢甲酰化反应研究

Olefin Hydroformylation Catalyzed by Long-chain Alkyl Diphenylphosphine-Rhodium Complexes

研究了烷基二苯基膦 -铑配合物 Rh Cl(CO) (n- C8H1 7PPh2 ) 2 (1)和 Rh Cl(CO) (n- C1 2 H2 5PPh2 ) 2 (2 )对 1-辛烯氢甲酰化反应的催化性能 .结果表明 ,配合物 1比 2具有更高的催化活性 ,而配合物 2对生成正构醛的选择性更好 ;当催化剂浓度或膦 /铑比增加时 ,配合物 2催化生成正构醛的选择性呈下降趋势 ,显示出与以

The catalytic performance of long chain alkyl diphenylphosphine rhodium complexes, \{RhCl\|\}(CO)( n C\-8H 17 PPh\-2)\-2(1) and RhCl(CO)( n C\-\{12\}H 25 PPh\-2)\-2(2), in hydroformylation of 1 octene were studied. Both 1 and 2 show good performance for hydroformylation of 1 octene, however, complex 1 exhibits higher activity, and complex 2 is more selective to the form ation of linear aldehyde. The increase of catalyst concentration is favorable to the conversion of 1 octene to aldehyde, but results in lower regioselectivity for linear aldehyde. In contrast to the performance of PPh\-3, the increase of molar ratio of phosphine to rhodium causes the decrease of regioselectivity for linear aldehyde when using 2 as the catalyst precursor.