铑配合物催化甲醇羰基化反应的性能和机理

本文合成了２－丁酸甲酯吡啶与四羰基二氯二铑形成的螯合形配合物，并用Ｘ射线光电子能谱（ＸＰＳ），红外光谱（ＩＲ）及核磁共振（ＮＭＲ）研究确定了其配位结构特征，通过甲醇羰基化制备乙酸的反应揭示了其结构特征对催化剂活性及稳定性的影响，并提出了可能的反应机理。

STUDY ON PERFORMANCE AND MECHANISM OF METHANOL CARBONYLATION CATALYZED BY RHODIUM COMPLEX

A chelate complex of 2 methyl butyrate pyridine with tetracarbonyldichlorodirhodium has been prepared. Structural characteristics of the complex have been determined by XPS, IR and 1H NMR. The experiments of methanol carbonylation to acetic acid have revealed the influence of the complex structure on catalytic reactivity and thermal stability of the catalyst. And a possible reaction mechanism has been suggested. Comparing with the small molecular rhodium catalyst with active center [Rh(CO) 2I 2] - reported in the past, the N-Rh bond in the title complex is stable to keep the complex integrating. The O-Rh bond is relatively week to keep the catalyst active. Thereby the performance of the catalyst has been optimized.