83201-99-4Relevant academic research and scientific papers
Meso, rac-Ph(X)P-(CH2)4-P(X)Ph Ligands in Complexes of the Type (CO)4Mcis(L-L), Investigation of Stereoisomerism by 31P and 13C NMR Spectroscopy
Diemert, Klaus,Kuchen, Wilhelm,Kutter, Juergen
, p. 841 - 844 (2007/10/02)
By reaction of M(CO)6 (M = Cr, Mo, W) with the bifunctional aminophosphane Ph(NEt2)P-CH2)4-P(NEt2)Ph (L-L) octahedral complexes (CO)4Mcis(L-L) are obtained.While it is shown by 31P NMR spectroscopy, that these complexes contain meso- and rac-(L-L) to a different extent, there is evidence from 13C NMR data obtained for the Mo complex, that the rac-ligand always prevails.As racemisation is observed when the Mo complex reacts with HBr to give (CO)4Mo-cis an SN1-mechanism is suggested for this reaction. - Key words: Carbonyl Complexes, Bifunctional Chiral Phosphanes, Stereoisomerism
