Preparation, Crystal Structure, and Stereochemical Properties of {N,N′-Ethylenebis(1,1,1-trifluoro-4-imino-2-pentanonato)} (l-methioninato)cobalt(III)
- 1 December 1985
- journal article
- research article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 58 (12) , 3486-3491
- https://doi.org/10.1246/bcsj.58.3486
Abstract
The (−)435 isomer of the {N,N′-ethylenebis(1,1,1-trifluoro-4-imino-2-pentanonato)}(L-methioninato)cobalt(III) complex, (−)435-[Co(tfac2en)(L-met)], was preferentially crystallized from an equilibrium mixture of the (−)435 and (+)435 isomers in methanol. The crystal structure of the (−)435 isomer was determined by X-ray diffraction. The (−)435 isomer is of a Λ-cis-β2 type in which the quadridentate tfac2en takes a nonplanar configuration, and the L-methioninate is bound to the cobalt atom by nitrogen and oxygen atoms as a bidentate ligand. The electronic absorption, CD, and 1H NMR spectral behaviors of both (−)435 and (+)435 isomers are discussed in relation to their geometrical and absolute configurations.Keywords
This publication has 14 references indexed in Scilit:
- The Stereochemistry and Reactivity of Metal–Schiff Base Complexes. V. The Solvent Effect on the Stereoselectivity of Cobalt(III) Complexes Containing a sal2en-type Schiff Base and l-Amino AcidBulletin of the Chemical Society of Japan, 1982
- Non–covalent Interactions in Metal Complexes. V. Stereoselectivity in Cobalt(III) Mixed-chelates with a Salen-like Schiff Base and 1-l-Menthyloxy-3-benzoylacetoneBulletin of the Chemical Society of Japan, 1982
- The Crystal and Molecular Structure of (N-Benzyl-l-alaninato)[N,N′-ethylenebis(α-methylsalicylideneaminato)]cobalt(III) TrihydrateBulletin of the Chemical Society of Japan, 1982
- The Stereochemistry and Reactivity of Metal-Schiff Base Complexes. IV. The Stereoselectivity of N,N′-Ethylenebis(α-methylsalicylideneaminato)cobalt(III) Complexes with N-Benzyl-l-alanine, N-Methyl-l-alanine, and N-Benzyl-N-Methyl-l-alanine, and the Stereospecificity of [1S, 2S)-N,N′-1,2-Cyclohexylenebis(salicylideneaminato)cobalt(III) Complexes toward N-Benzyl-l-alanineBulletin of the Chemical Society of Japan, 1981
- The Stereochemistry and Reactivity of Metal-Schiff Base Complexes. III. The Kinetic and Thermodynamic Stereoselectivities in the Formation of N,N′-Ethylenebis(α-methylsalicylideneaminato)cobalt(III)Complexes with l-Proline, Hydroxy-l-proline, and allo-Hydroxy-l-prolineBulletin of the Chemical Society of Japan, 1980
- The Stereochemistry and Reactivity of Metal-Schiff Base Complexes. II. High Stereoselectivity in (1S,2S)-N,N′-1,2-Cyclohexylenebis-(salicylideneaminato)(sal2-(S,S)-chxn) Cobalt(III) Complexes with Amino Acids and the Optical Resolution of Amino Acids with Cobalt(III)-sal2-(S,S)-chxnBulletin of the Chemical Society of Japan, 1977
- Stereochemistry and Reactivity of Metal–Schiff-base Complexes. I. Preparation and Thermodynamic Stereoselectivity of Mixed Ligand Cobalt(III) Complexes Containing N,N′-Ethylenebis(salicylideneamine) Dianion (sal2en) or N,N′-Ethylenebis(7-methylsalicylideneamine) Dianion (7,7′-Me-sal2en) and l-Amino Acid AnionBulletin of the Chemical Society of Japan, 1976
- Circular dichroism of tetradentate Schiff base chelates of oxovanadium(IV)Inorganic Chemistry, 1970
- Circular dichroism of square-planar, tetradentate Schiff-base chelates of nickel(II)Journal of the American Chemical Society, 1970
- An interpretation of the circular dichroism and electronic spectra of salicylaldimine complexes of square-coplanar diamagnetic nickel(II)Journal of the American Chemical Society, 1968