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- W2006247069 abstract "Abstract The chloro bridges of the dinuclear complexes [(. 65 ‐cymene)‐RuCl 2 ] 2 and [(. 5 ‐C 5 Me 5 )RhCl 2 ] 2 can be cleaved by reaction wht an N ‐phenyltriazolium perchlorate ( 1 ) and a base, resulting in the formation of (carbene)metal complexes. In this manner, abstraction of one ortho ‐proton of the phenyl group and elimination of HCl leads to pseudo ‐tetrahedral ruthenium ( 2 ) and rhodium ( 3 ) complexes, thereby creating a stereogenic center at the transition metal. By using enantiomerically pure triazolium perchlorates, the diastereoselective synthesis of these complexes with diastereomeric excesses of up to 95% can be achieved, with the possibility of separating the two diastereomers by column chromatography. The relative, and therefore also the absolute configuration of the ruthenium complex ( R Ru )‐ 2b could be determined by X‐ray structure analysis. A stereospecific substitution of chlorine by iodine or acetonitrile to form the diastereomerically pure complexes 4, 5 and 6 (the latter as cationic ruthenium complexes) allows a further variation of the ligands." @default.
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- W2006247069 date "1997-09-01" @default.
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- W2006247069 title "Diastereoselective Synthesis of the First Enantiomerically Pure (Triazolinylidene)ruthenium(ii) and ‐rhodium(iii) Chelate Complexes" @default.
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- W2006247069 doi "https://doi.org/10.1002/cber.19971300913" @default.
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