respectively. The solid-state structures of these complexes are quite similar to that of the sterically smaller 5,5-dimethyldipyrrolylmethane complex Ti(NMe2)2(dmpm) with one η5- and one η1-pyrrolyl; however, the substituted derivatives display much lower barriers to pyrrolyl conformational exchange, as judged by VT 1H NMR spectroscopy. Also synthesized were bis(pyrrolyl) complexes without the methylene connector
丙酮和2-芳基
吡咯的
三氟乙酸催化反应导致形成2,9-二芳基-5,5-二甲基二
吡咯基
甲烷。使用该方法制备了具有3,5-(CF 3)2 C 6 H 3(H 2
DMPm 3,5-CF 3)和
异戊二烯(H 2
DMPm mes)
芳烃的
配体,其收率分别为72%和68%。新的二
吡咯基
甲烷与Ti(NMe 2)4反应形成Ti(NMe 2)2(
DMPm 3,5-CF 3)和Ti(NMe 2)2(
DMPm mes))分别以92%和30%的收益率提供。这些复合物的固态结构是非常相似的是,空间上较小的5,5- dimethyldipyrrolylmethane复杂的Ti(NME的2)2(
DMPM)与一种η 5 -和一个η 1
吡咯基; 然而,如通过VT 1 H NMR光谱所判断的,取代的衍
生物对
吡咯基构象交换显示出低得多的障碍。还合成了没有亚甲基连接基的双(
吡咯基)配合物。芳基为3,5-(CF 3)2 C 6 H