Unprecedented Stereoselective Synthesis of Catalytically Active Chiral Mo3CuS4 Clusters
作者:Marta Feliz、Eva Guillamón、Rosa Llusar、Cristian Vicent、Salah-Eddine Stiriba、Julia Pérez-Prieto、Mario Barberis
DOI:10.1002/chem.200500907
日期:2006.2.1
precursor is preserved in the final product. Cationic complexes [(P)-1]+, [(M)-1]+, [(P)-2]+, and [(M)-2]+ combine the chirality of the metal cluster framework with that of the optically active diphosphane ligands. The known racemic [Mo3CuS4(dmpe)3Cl4]+ cluster (dmpe = 1,2-bis(dimethylphosphanyl)ethane) as well as the new enantiomerically pure Mo3CuS4 [(P)-2]+ and [(M)-2]+ complexes are efficient catalysts
用手性膦(+)-1,2-双[(2R,5R)-2,5-(二甲基膦基-1-基)]乙烷((R,R)-Me- BPE)或其对映体((S,S)-Me-BPE)产生三核簇复合物[Mo3S4 (R,R)-Me-BPE} 3Cl3] +([[P)-1]的立体选择性形成。 +)和[Mo3S4 (S,S)-Me-BPE} 3Cl3] +([(M)-1] +)。这些络合物具有不完整的立方形结构,其中金属原子限定了一个等边三角形,并且一个封端和三个桥联的硫原子。P和M符号指的是氯原子绕C3轴的旋转,加盖的硫原子指向观察者。将铜结合到这些三核配合物中可得到式[Mo3CuS4 (R,R)-Me-BPE} 3Cl4] +([(P)-2] +)或[Mo3CuS4 (S,S) -Me-BPE} 3Cl4] +([(M)-2] +),分别在最终产物中保留了三核前体的手性。阳离子络合物[(P)-1] +,[(M)-1]