The structure and propertIes of three lithmm-bonded complexes. HsN.. LIH, CzHa... LW, CzH, .-LiH, and tire hydrogenbonded analogues. H,N ..HF and CzHz J-IF, hare been investigated at the SCF double-zeta plus polarization Ievel. The changes of several properties of LI-bonded comple\es as a function o
SCF AB initio study of the protonation of the peptide bond
β Scribed by Alberte Pullman
- Publisher
- Elsevier Science
- Year
- 1973
- Tongue
- English
- Weight
- 365 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
The polarization (energy lowering, electronic displacements and induced dipoles) and cbargr-transfer effects are separately computed for the approach of a proton in various directions towards formamide, and the further effect of the geometrical deformations of the attacked molecule is established. None of these effects appexs upable to reverse the prediction made on the basis of electrostatic potentials pointing to the oxygen atom as ths primary protonation site.
π SIMILAR VOLUMES
Ab initio SCF LCAO hi0 calculations for the [ HzO.. Cl]complex have been performed. The energy of the linear hydrogen bond has been found to be.lower than the energy of the bifurcated one. The difference of the energies is about 3 kcai/mole. The calculated equilibrium distance between the oxygen and
An ab initio study of the low-lying states of protonated Sis was carried out at the HF/6-31G\*\* level. Five states were studied: 'A, ( I), 'A, (2), 'C+, 'A' and 'B,. 'A,(2) and 'Z+ were found to he transition states at the Hanree-Foek level. 'A' and 'B2 are the two possible candidates for the groun
Ab initio CAS SCF/MRSDCI calculationswere performed for the naked CuCHz cluster. The ground state is predicted to be the 'B, state having a planar structure. The state arises from Cu('S) and CH2(iB,). The Cu-CH, o bond has a covalent character and the binding energy is 2.23 eV (5 I kcal/mol). The op