Catalysts prepared in situ from 1,2-(But2PCH2)2C6H4 (DTBPMB) and [RhCl(CO)2]2 catalyse the carbonylation of methanol in the presence of MeI at rates (4.12 and 8.90 × 10−4 mol dm−3 s−1 at 150 and 180 °C respectively) faster than those in the absence of added phosphine, although they decompose to [RhI2(CO)2]− over time. HPIR studies suggest that MeI adds to [Rh(DTBPMB)X(CO)] (X = Cl or I), which have
催化剂类由1,2-(Bu t 2 PCH 2)2 C 6 H 4(
DTBPMB)和[RhCl(CO)2 ] 2原位制备可催化羰基化
甲醇在MeI的存在下(尽管它们分解为[RhI 2(CO))的速率(分别在150和180°C下分别为4.12和8.90×10 -4 mol dm -3 s -1在150和180°C时)比没有添加膦的情况下更快2 ] -随着时间的流逝。H
PIR研究表明,MeI添加到[Rh(
DTBPMB)X(CO)](X = Cl或I)中,已分离并充分表征,得到[Rh(
DTBPMB)MeI 2(CO)]。[Rh(
DTBPMB)MeI 2(CO)]与CO反应生成[Rh(
DTBPMB)(C(O)Me)I 2(CO)],但是
甲醇 提升 分解[RhI 2(CO)2 ] -和[1,2-(MeBu t 2 PCH 2)2 C 6 H 4)] [I 3 ] 2的分离和表征。H
PNMR研究表明,[R