the oxygen-acceptor. Complexes Ph4P[Mo(O)(O2)2(QR)] were shown to be poor catalyst precursors in oxidation reactions, while the activity of [Mo(O)(O2)(QR)2] species is good in all the studied reactions and comparable to related oxidoperoxido–molybdenum(VI) complexes. Complex [Mo(O)2(QC6)2], 12, was obtained by treatment of 10 with one equivalent of PPh3, demonstrating that the first step in the epoxide
通过[Mo(O)(O)2(H 2 O)n ]与相应的酰基
吡唑啉酮化合物HQ R反应,可得到含酰基
吡唑啉酸酯
配体的氧化过氧化物
钼(VI)配合物。配合物Ph 4 P [Mo(O)(O 2)2(Q R)](R =新戊基,1;
全氟乙基,2;己基,3;苯基,4;
萘基,5;甲基,6;环己基,7;如果反应是用一当量的HQ进行的,则得到乙基环戊基,8)R在Ph 4 PCl存在下。或者,当在反应中使用两个当量的HQ R时,形成中性络合物[Mo(O)(O 2)(Q R) 2 ](R =新戊基, 9;己基, 10;环己基, 11)。这些配合物以黄色或橙黄色结晶固体的高收率分离,并经光谱分析(IR, 1 H, 13 C 1 H}和31 P 1 H} NMR),理论上(DFT)和结构表征(X-射线为1, 2, 9和10)。选择化合物1和9来研究其在所选烯烃的环氧化和所选
硫化物的氧化中的催化行为,而10和11在使用PPh