Synthesis, Structures, and Ring-Opening Polymerization Reactions of Substituted Cyclopentadienyl Complexes of Zinc
作者:Dennis A. Walker、Timothy J. Woodman、Mark Schormann、David L. Hughes、Manfred Bochmann
DOI:10.1021/om020690a
日期:2003.2.1
9a−c, X = Et). The crystal structures of 8b and 9c show η2-bound cyclopentadienyl ligands, with one long and one short Zn−C interaction. The reaction of 7c with B(C6F5)3 in toluene proceeds with alkyl/C6F5 exchange to give CpmesZn(C6F5) (10). Treatment of 9c with B(C6F5)3 in toluene results in an ionic product, [CpmesZn(TMEDA)]+[EtB(C6F5)3]- (11). On the other hand, the reaction of 9a with B(C6F5)3 in
2当量的新吡咯取代的环戊二烯基配体环C 4 H 4 NSiMe 2 C 5 H 5(2a,Cp py H)与Zn [N(SiMe 3)2 ] 2的反应生成双(环戊二烯基)锌络合物Zn(Cp py)2(3a)。的反应图2a和相关的衍生物的环- 2,5--ME 2 c ^ 4 ħ 2 NSiMe 2 ç 5 ħ 5(在图2b中,Cp pyme H)和3,5-Me 2 C 6 H 3 CH 2 CMe 2 C 5 H 5(2c,Cp mes H)与二丁基镁一起给出相应的茂金属MgCp R 2(3a - c)。将适当的环戊二烯与二烷基锌在甲苯中长时间加热,或与[XZnN(SiMe 3)2 ] 2在甲苯中于40°C搅拌1小时,得到单环戊二烯基锌烷基络合物Cp R ZnX(6a,CpR = Cp py,X = Me; 6c,Cp R= Cp mes,X = Me;7a,Cp R= Cp py,X = Et;在图7c中,Cp