The Crystal and Molecular Structure of (N-Benzyl-l-alaninato)[N,N′-ethylenebis(α-methylsalicylideneaminato)]cobalt(III) Trihydrate
- 1 June 1982
- journal article
- research article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 55 (6) , 1834-1839
- https://doi.org/10.1246/bcsj.55.1834
Abstract
The crystal and molecular structure of the title complex (−)435-ΛRS-β2(mer)-[Co(α-Me-sal2en)(N-Bz-L-ala)]·3H2O, has been determined by single crystal X-ray analysis. The crystals are orthorhombic, space group P212121, with unit cell dimensions a=19.247(8), b=14.162(4), c=10.329(4) Å, and Z=4. The structure was solved by the heavy-atom method and refined by block-diagonal least-squares technique, using 1624 independent reflections, to the final R-value of 0.080. The molecular structure is of a ΛRS-cis-β2(mer) type in which two coordination sites of a distorted octahedron are occupied by the N-Bz-L-ala group and the others by the quadridentate α-Mesal2en Schiff-base ligand in a nonplanar configuration. The Co–O and Co–N bon lengths, 1.938(12) and 1.989(15) Å respectively, of the N-Bz-L-ala group are significantly longer than the usual values. The molecule is distinctly strained as shown by the bond angles of the ligands and those of the cobalt(III) coordination polyhedron. The water molecules form a hydrogen bonded chain linking phenolate and carboxylate oxygens of different molecules along the crystallographic c axis.Keywords
This publication has 13 references indexed in Scilit:
- 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
- Crystal and molecular structure of [.alpha.-N-(o-hydroxybenzyl)-L-histidinato](L-alaninato)cobalt(III) dihydrateInorganic Chemistry, 1978
- The crystal structure and absolute configuration of (−)-mer-tris(L-alaninato)cobalt(III) monohydrateActa Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 1978
- L-(+)546-L-Phenylalaninatobis(acetylacetonato)cobalt(III)–chloroformActa Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 1977
- The crystal and molecular structure of chloropyridine-N,N'-tetramethylenebis(salicylaldiminato)rhodium(III)Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 1976
- The crystal and molecular structure of a cobalt(III) compound of the quadridentate ligand N,N′-o-phenylenebis(salicylideneiminate) in a strained non-planar configurationInorganica Chimica Acta, 1975
- Structural aspects of metal complexes with some tetradentate schiff basesCoordination Chemistry Reviews, 1972
- Tentative proposals for nomenclature of absolute configurations concerned with six-coordinated complexes based on the octahedronInorganic Chemistry, 1970
- The stereochemistry of some cobalt(III) triethylenetetramine complexes of glycine and sarcosineInorganic Chemistry, 1967