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PM3 (UHF) type quantum chemical treatment of the models for Ni-C state of [NiFe] hydrogenase from Desulfovibrio vulgaris
Date
2004-03-01
Author
Turker, L
Eroglu, I
Yucel, M
Gündüz, Ufuk
Metadata
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Theoretical models based on the structure excerpted from the literature for Ni-C state of [NiFe] hydrogenase from Desulfovulgaris (Miyaszaki F) were considered. These models mainly possess either CO,CN and SO or CO,CO and SO ligands on the iron site. All the cysteinyl moieties of the models are in the amide form. In addition to the neutral forms, -/+1 charged forms of these models have been subjected to semiempirical quantum chemical analysis (PM3 (UHF)). After strict geometry optimization, certain quantum chemical and thermodynamic properties were calculated. The calculations have revealed that all the models are thermodynamically stable and exothermic. However, the heat of formation data indicate that negatively charged systems are more exothermic than the neutral ones and they are more exothermic than the positively charged ones. Variation of some bond lengths and bond angles as the charge develops were investigated. Also the effect of charge on the fronlier molecular orbitals, their energies and the interfrontier molecular orbital energy gaps were studied.
Subject Keywords
Hydrogenase
,
Desulfovulgaris
,
[NiFe] hydrogenase
,
PM3
,
NiC-state
,
NiC-state
URI
https://hdl.handle.net/11511/32089
Journal
JOURNAL OF MOLECULAR STRUCTURE-THEOCHEM
DOI
https://doi.org/10.1016/j.theochem.2003.11.019
Collections
Graduate School of Natural and Applied Sciences, Article
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L. Turker, I. Eroglu, M. Yucel, and U. Gündüz, “PM3 (UHF) type quantum chemical treatment of the models for Ni-C state of [NiFe] hydrogenase from Desulfovibrio vulgaris,”
JOURNAL OF MOLECULAR STRUCTURE-THEOCHEM
, pp. 169–174, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32089.