Molecular structure of bis(L-leucinato)zinc(II) and single-crystal EPR spectra of the substitutionally sup 63 Cu(II)-doped complex
- Instituto de Desarrollo Tecnologico para la Industia Quimica (INTEC), Santa Fe (Argentina)
- Universidad Nacional de La Plata (Argentina)
The title compound, Zn(H{sub 2}NCHCO{sub 2}CH{sub 2}CH(CH{sub 3}){sub 2}){sub 2} (abbreviated as Zn(L-Leu){sub 2}), crystallizes in the monoclinic system, space group P2{sub 1}, with a = 9.584 (4) {angstrom}, b = 5.389 (2) {angstrom}, c = 14.866 (3) {angstrom}, {beta} = 106.84 (3){degree}, and Z = 2. The two L-leucine molecules per formula unit act as bidentate ligands of the Zn(II) ion, forming a N{sub 2}O{sub 2} squashed tetrahedral configuration. The carboxyl oxygen of a third amino acid molecule completes a pentagonal coordination around Zn(II). The crystal structure of Zn(L-Leu){sub 2} was compared to the quasi-isomorphous structure of the Cu(L-Leu){sub 2} complex. Room-temperature EPR data of substitutional {sup 63}Cu(II) impurities in single crystals of Zn(L-Leu){sub 2} were taken at 34 GHz. The EPR results are discussed in terms of the structure of Zn(L-Leu){sub 2} and compared with EPR data in the structurally related Cu(L-Leu){sub 2} complex. Lattice distortions at the impurity sites of Zn(L-Leu){sub 2} are detected and discussed. 29 refs., 6 figs., 5 tabs.
- OSTI ID:
- 5117154
- Journal Information:
- Inorganic Chemistry; (USA), Vol. 28:10; ISSN 0020-1669
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
LEUCINE
MOLECULAR STRUCTURE
ZINC COMPLEXES
COPPER 63
DOPED MATERIALS
ELECTRON SPIN RESONANCE
EXPERIMENTAL DATA
MONOCRYSTALS
AMINO ACIDS
CARBOXYLIC ACIDS
COMPLEXES
COPPER ISOTOPES
CRYSTALS
DATA
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTOPES
MAGNETIC RESONANCE
MATERIALS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
RESONANCE
STABLE ISOTOPES
400201* - Chemical & Physicochemical Properties
400202 - Isotope Effects
Isotope Exchange
& Isotope Separation