New trisubstituted cyclopentadienyl ligands: synthesis, characterisation and catalytic properties of mono and dinuclear cobalt, rhodium, iron and ruthenium complexes
作者:Mirco Costa、Enrico Dalcanale、Francisco Santos Dias、Claudia Graiff、Antonio Tiripicchio、Lorenzo Bigliardi
DOI:10.1016/s0022-328x(00)00652-5
日期:2001.1
Their coordinating abilities as anions have been investigated in relation to the formation of new sandwich, half-sandwich and dinuclear complexes and their structural features. We report here the preparation and characterisation of some complexes such as a mononuclear half-sandwich cobalt(1,5-COD) complex which has shown to be a very efficient catalyst for the cyclocotrimerisation reaction of alkynes
描述了一组4-烷氧基羰基环戊-1,3-二烯-1,2-二乙酸二烷基酯(1a – e)的合成。已经研究了它们作为阴离子的配位能力,与新的三明治,半三明治和双核配合物的形成及其结构特征有关。我们在这里报告一些配合物的制备和表征,例如单核半夹心钴(1,5-COD)配合物,该配合物已被证明是炔烃和腈与吡啶的环共三聚反应的非常有效的催化剂。包含具有不同长度的酯链的三取代的环戊二烯基配体的半三明治铑二羰基络合物已成功地用作苯乙烯的加氢甲酰化催化剂。最后是配体1a –e已用于合成二茂铁和铁和钌的双核羰基配合物。配合物1,5-环戊二烯[1-甲氧基羰基-3,4-二(甲氧基羰基亚甲基)环戊二烯基]钴[Co(MDMCp)COD](9),二羰基[1-甲氧基羰基-3,4-二(甲氧基羰基亚甲基))X射线衍射法测定了)环戊二烯基]铑[Rh(MDMCp)(CO)2 ](2a)和新的二茂铁配合物[Fe(MDMCp)2 ](15a)。