Synthesis, spectral characterization, and molecular structure of (N-(2-pyridylmethyl)-L-aspartato)(L-phenylalaninato)cobalt(III) trihydrate, (Co(PLASP)(L-Phe)). 3H/sub 2/O
The new Co/sup III/N/sub 3/O/sub 3/ complex (Co(PLASP)(L-Phe)).3H/sub 2/O was prepared by the oxidation of Co(II) to Co(III) in the presence of N-2-pyridylmethyl)-L-aspartic acid, PLASPH/sub 2/, and L-phenylalanine, L-Phe. The crystal and molecular structure of the complex, determined by three-dimensional X-ray analysis, established that of the four possible geometrical isomers, the only isomer isolated was a facial isomer in which the ..beta..-COO/sup -/ and the pyridine groups of PLASP/sup 2 -/ are mutually trans. The compound crystallizes in the orthorhombic space group P2/sub 1/2/sub 1/2/sub 1/, with a = 9.821 (3) A, b = 23.069 (4) A, c = 9.564 (2) A, and Z = 4. The structure was solved by the heavy-atom method and refined by full-matrix least-squares procedures to a final R factor of 0.059. The geometry around the cobalt atom is distorted octahedral, with the PLASP/sup 2 -/ ligand being tetradentate and the L-phenylalaninate ligand bidentate. In addition to the crystal structure, the /sup 1/H NMR and visible spectra of (Co(PLASP)(L-Phe)).3H/sub 2/O are discussed.
- Research Organization:
- Ames Lab., IA
- OSTI ID:
- 5102359
- Journal Information:
- Inorg. Chem.; (United States), Vol. 19:7
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COBALT COMPLEXES
CHEMICAL PREPARATION
CRYSTAL STRUCTURE
LATTICE PARAMETERS
MOLECULAR STRUCTURE
ASPARTIC ACID
BOND ANGLE
INTERATOMIC DISTANCES
ISOMERS
NMR SPECTRA
ORTHORHOMBIC LATTICES
PYRIDINES
STRUCTURAL CHEMICAL ANALYSIS
VISIBLE SPECTRA
X-RAY DIFFRACTION
AMINO ACIDS
AZINES
CARBOXYLIC ACIDS
COHERENT SCATTERING
COMPLEXES
CRYSTAL LATTICES
DIFFRACTION
DISTANCE
HETEROCYCLIC COMPOUNDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
SCATTERING
SPECTRA
SYNTHESIS
TRANSITION ELEMENT COMPLEXES
400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)