化学
虚张声势
取代基
部分
位阻效应
环戊二烯基络合物
镍
金属
立体化学
结晶学
药物化学
晶体结构
超分子化学
有机化学
催化作用
作者
Nallusamy Natarajan,Thierry Chavagnan,David Sémeril,Eric Brenner,Dominique Matt,Rengan Ramesh,L. Toupet
标识
DOI:10.1002/ejic.201701143
摘要
Two imidazolium salts, one with a single N ‐µ 4 ‐tetramethylenedioxyresorcin[4]arenyl substituent, the other with two, have been used as pro‐ligands (LH) for the synthesis of nickel half‐sandwich complexes of the type [NiCpClL] (Cp = cyclopentadienyl). NMR and X‐ray structural investigations revealed that in both complexes the NiCp moiety is positioned at the wider entrance of the resorcinarenyl cavity, this location providing high steric encumbrance around the metal centre. Both complexes, once activated with NaBH 4 , catalysed the dimerisation of ethylene, the highest activity [555 mol(C 2 H 4 ) mol(Ni) –1 h –1 ] being observed with the complex bearing two cavitand substituents.
科研通智能强力驱动
Strongly Powered by AbleSci AI