Theoretical barrier to rotation in substituted triptycenes: A semi-empirical and Ab initio study

Tetrahedron ◽  
1997 ◽  
Vol 53 (13) ◽  
pp. 4661-4668 ◽  
Author(s):  
Gordon M. Elsey ◽  
Marisa D. Ciampini ◽  
Dennis K. Taylor
Keyword(s):  
Ab Initio ◽  
Ab Initio Study ◽  
Semi Empirical

scholarly journals STRUCTURAL AND ELECTRONIC PROPERTIES OF BRIDGED BITHIOPHENE S-OXIDES (BTO) WITH S, S=O, O, SiH2 and BH2 BRIDGE: SEMI-EMPIRICAL AND AB INITIO STUDY

2010 ◽  
Vol 18 (18) ◽  
pp. 1-10
Author(s):  
Banjo Semire ◽  
Isaiah Ajibade Adejoro ◽  
Olusegun Ayobami Odunola
Keyword(s):  
Density Functional Theory ◽  
Thermodynamic Properties ◽  
Ab Initio ◽  
Density Functional ◽  
Ab Initio Study ◽  
Empirical Methods ◽  
Functional Theory ◽  
Structural And Electronic Properties ◽  
Semi Empirical ◽  
Good Agreement

In this paper, we theoretically studied the geometries, stabilities, electronic and thermodynamic properties of bridged bithiophene S-oxide (BTO-X) derivates (with X = BH2, SiH2, S, S=O, and O) by using semi-empirical methods, ab-initio, and Density functional theory. The geometries and thermodynamic parameters calculated by PM3 were in good agreement with that of B3LYP/6-31G(d). The bandgap calculated by B3LYP/6-31G(d) ranged from 3.94eV (BTO-O)-3.16eV (BTO-BH2). The absorption λmax calculated suing B3LYP/6-31G(d) shifted to longer wavelength with X=BH2, SiH2, and S=O due to enhancement of π-conjugated system whereas, BTO-S and BTO-O shifted to shorter wavelengths as compared to dimmer thiophene S-oxide (2TO).

Semi-empirical and ab initio study of pericyclized naphthalene systems containing an eight-membered ring

1999 ◽  
Vol 489 (1) ◽  
pp. 67-72 ◽  
Author(s):  
I. Yavari ◽  
D. Tahmassebi ◽  
K. Jadidi ◽  
D. Nori-Shargh ◽  
S. Balalaie
Keyword(s):  
Ab Initio ◽  
Membered Ring ◽  
Ab Initio Study ◽  
Semi Empirical

An ab initio study of Se-reacted GaAs(0 0 1) surfaces

1998 ◽  
Vol 184-185 (1-2) ◽  
pp. 80-84 ◽  
Author(s):  
W Faschinger
Keyword(s):  
Ab Initio ◽  
Ab Initio Study

Carrier Transport in 2-D Materials: an Ab Initio Study

2019 ◽  
Author(s):  
Mathieu Luisier ◽  
Aron Szabo ◽  
Cedric Klinkert ◽  
Christian Stieger ◽  
Martin Rau ◽  
...  
Keyword(s):  
Ab Initio ◽  
Carrier Transport ◽  
Ab Initio Study

Ion solvation by dipolar aprotic solvents. An ab initio study

1987 ◽  
Vol 52 (1) ◽  
pp. 6-13 ◽  
Author(s):  
Petr Kyselka ◽  
Zdeněk Havlas ◽  
Ivo Sláma
Keyword(s):  
Ab Initio ◽  
Geometry Optimization ◽  
Molecular Structures ◽  
Dimethyl Sulphoxide ◽  
Ion Solvation ◽  
Interaction Energies ◽  
Ab Initio Study ◽  
Solvation Energies ◽  
Dipolar Aprotic Solvents ◽  
Complete Geometry Optimization

The paper deals with the solvation of Li+, Be2+, Na+, Mg2+, and Al3+ ions in dimethyl sulphoxide, dimethylformamide, acetonitrile, and water. The ab initio quantum chemical method was used to calculate the solvation energies, molecular structures, and charge distributions for the complexes water···ion, acetonitrile···ion, dimethyl sulphoxide···ion, and dimethylformamide···ion. The interaction energies were corrected for the superposition error. Complete geometry optimization was performed for the complex water···ion. Some generalizations are made on the basis of the results obtained.

An ab initio study of the structural and mechanical alterations of Ti-Nb alloys

2018 ◽  
Vol 124 (24) ◽  
pp. 245102 ◽  
Author(s):  
J. J. Gutiérrez Moreno ◽  
D. G. Papageorgiou ◽  
G. A. Evangelakis ◽  
Ch. E. Lekka
Keyword(s):  
Ab Initio ◽  
Ab Initio Study
Sign in / Sign up

Export Citation Format

Share Document