作者:Cristina Jiménez-Rodríguez、Francesc X. Roca、Carles Bo、Jordi Benet-Buchholz、Eduardo C. Escudero-Adán、Zoraida Freixa、Piet W. N. M. van Leeuwen
DOI:10.1039/b513870c
日期:——
Several SPANphos ligands based on a spirobichroman backbone, introduced as a putative trans ligand, form compounds of the type [Rh(nbd)(SPANphos)]BF(4) () in which both norbornadiene and SPANphos act as cis chelating ligands. The cyclooctadiene rhodium chloride derivatives form bimetallic complexes. Crystal structures for several of these compounds and free ligands are reported. Semiemperical AM1 and
几种基于螺双色满骨架的SPANphos配体作为推定的反式配体引入,形成[Rh(nbd)(SPANphos)] BF(4)()类型的化合物,其中降冰片二烯和SPANphos均充当顺式螯合配体。环辛二烯氯化铑衍生物形成双金属配合物。报道了其中一些化合物和游离配体的晶体结构。半经验AM1和DFT计算表明,螺双色满可以假定几种构象,其中一些适合于顺式螯合SPANphos的形成。PdCl(2),PtCl(2)和Rh(CO)Cl的SPANphos络合物的所有计算表明,反式络合物通过4-10 kcal mol(-1)更稳定。顺式螯合降冰片二烯配体可增强顺式构象。