Collect. Czech. Chem. Commun.
1986, 51, 2109-2115
https://doi.org/10.1135/cccc19862109
Synthesis and characterization of Δ-cis(N)-trans(O5)-RR sodium bis-((S)-α-alaninato-N-monopropionato)cobaltate(III) isomer
Bohumil Hájek, Jana Ondráčková and František Jursík
Department of Inorganic Chemistry, Prague Institute of Chemical Technology, 166 28 Prague 6
Abstract
Of the 12 possible diastereoisomers only Δ-cis(N)-trans(O5)-(RR)-Na[Co(alamp)2] isomer was isolated. Possible reasons explaining stereospecific coordination of ligand are discussed in terms of steric intra- and interligand interactions arising from the mutual position of -CH3 and N-CH2-CH2- groups. These exclude all isomers with SS or RS configuration of secondary nitrogen atoms. For the determination of the absolute configuration visible absorption, 1H, 13C NMR, circular dichroism and molecular models were employed.
