revealed a reversible conversion of 8a into 8b above 60 °C. The X-ray crystal structure determination of complexes 4Br, 5Br and 7 confirmed their C2-symmetrical configuration in the solid state with cis-arranged benzyl/chloro groups and the trans-coordination of two bulky phenolato moieties. The zirconium dibenzyl complexes exhibit good catalytic activities in homopolymerization of 1-hexene (atactic
四齿[OSSO]型双(
酚)
配体[2,2'-(HOC 6 H 2 -4,6-R 2)2 CH 2 SCH 2 CH 2 SCH 2 }](R = t Bu,2 ; Br,3)与MBz 4(M = Zr,Hf)反应生成相应的二苄基配合物[M 2,2'-(OC 6 H 2 -4,6-R 2)2 CH 2 SCH 2 CH 2 SCH 2 } Bz 2 ](R = Br,M = Zr,4 Br ; Hf,5
溴; R = t Bu,M = Hf,5)的收率非常好。二酰胺
锆配合物[Zr 2,2'-(OC 6 H 2 -4,6-R 2)2 CH 2 SCH 2 CH 2 SCH 2 }(NMe 2)2 ](R = t Bu,6 ; Br ,6
溴)在相应的二钠盐的反应制备2或3产生的原位用的ZrCl 2(NME 2)2(THF)2。用TMSCl在35°C下加热6,得到二
氯锆络合物[Zr 2,2'-(OC