An examination of the 2 1A1 states of formaldehyde and ketene including analytic configuration interaction energy first derivatives for singlet excited electronic states of the same symmetry as the ground state

1987 ◽  
Vol 87 (12) ◽  
pp. 7076-7095 ◽  
Author(s):  
Wesley D. Allen ◽  
Henry F. Schaefer
Keyword(s):  
Interaction Energy ◽  
Configuration Interaction ◽  
Ground State ◽  
Electronic States ◽  
Excited Electronic States

scholarly journals Ab Initio Study of Ground-state CS Photodissociation via Highly Excited Electronic States

2019 ◽  
Vol 882 (2) ◽  
pp. 86 ◽  
Author(s):  
Zhongxing Xu ◽  
Nan Luo ◽  
S. R. Federman ◽  
William M. Jackson ◽  
Cheuk-Yiu Ng ◽  
...  
Keyword(s):  
Ab Initio ◽  
Ground State ◽  
Electronic States ◽  
Ab Initio Study ◽  
Excited Electronic States

Controlled intramolecular H-transfer in malonaldehyde in the electronic ground state mediated through the conical intersection of 1nπ* and 1ππ* excited electronic states

2019 ◽  
Vol 21 (36) ◽  
pp. 20018-20030 ◽  
Author(s):  
K. R. Nandipati ◽  
Arun Kumar Kanakati ◽  
H. Singh ◽  
S. Mahapatra
Keyword(s):  
Ground State ◽  
Electronic States ◽  
Laser Pulses ◽  
Electronic Ground State ◽  
Conical Intersection ◽  
Uv Laser ◽  
Excited Electronic States ◽  
Electronic Ground

We report photo-isomerization of malonaldehyde in its electronic ground state (S0), mediated by coupled 1nπ*(S1)–1ππ*(S2) excited electronic states, accomplished with the aid of optimally designed ultraviolet (UV)-laser pulses.

The absorption spectrum of liquid bromine

1937 ◽  
Vol 162 (910) ◽  
pp. 414-419 ◽  
Author(s):  
D. Porret ◽  
Frederick George Donnan
Keyword(s):  
Absorption Spectrum ◽  
Absorption Spectra ◽  
Ground State ◽  
Wave Length ◽  
Electronic States ◽  
Excited Electronic States ◽  
Long Wave ◽  
Liquid Bromine ◽  
Continuous Absorption ◽  
The Continuum

The continuous absorption spectra of gaseous bromine (Peskow 1917; Ribaud 1919; Gray and Style 1929; Acton, Aikin and Bayliss 1936) and of dissolved bromine (Bovis 1929; Gillam and Morton 1929) have been studied many times. They present a wide continuum (from about 30, 000 to 17, 000 cm. -1 .) with a maximum at 24, 000 cm. -1 . For the gas the continuum is preceded by two band systems on the long wave-length side. These systems converge at 19, 585 and 15, 896 cm. -1 . respectively. Acton, Aikin and Bayliss (1936) have shown that the continuum is not simple, and Mulliken (1936) and Darbyshire (1937) have pointed out that there are three overlapping continua corresponding to transitions from the ground state to three different excited electronic states. There are 3 II 0 + ← 1 Σ g , 3 II 1 ← 1 Σ g and 1 II ← 1 Σ g . The absorption spectrum of liquid bromine has been studied by Bovis (1929) form 18, 525 to 31, 750c cm. -1 . and by Camichel (1893) for two frequencies only (16, 978 and 18, 691 cm. -1 ).

Excited electronic states of 1, 3-butadiene

1955 ◽  
Vol 230 (1182) ◽  
pp. 322-330 ◽  
Keyword(s):  
Excited States ◽  
Configuration Interaction ◽  
Energy Levels ◽  
Electronic States ◽  
Interaction Method ◽  
Excited Electronic States ◽  
Configuration Interaction Method ◽  
Self Consistent ◽  
Electronic Wave Function ◽  
Orthogonal Set

Approximate self-consistent orbitals for excited electronic states of cis - and trans -1, 3- butadiene are obtained by a modification of Roothaan’s procedure, in the non-empirical π-electron approximation. The integrals used were evaluated by Parr & Mulliken for calculation of the ground-state electronic wave function. The effects of configuration interaction are calculated by an approximate method and compared with an exact calculation. Molecular orbitals have been obtained both with and without the auxiliary condition that spatial factors of both α and β spin-orbitals should be members of a single orthogonal set. Semiempirical values for the basic integrals, due to Pariser & Parr, have also been used to calculate the energies of excited states by the approximate configuration interaction method. Energy levels derived from the Pariser-Parr integrals are in close agreement with observed levels, which differ considerably from those calculated from the Parr-Mulliken non-empirical integrals.

Low-energy excited states of divanadium: a matrix isolation and MRCI study

2016 ◽  
Vol 18 (21) ◽  
pp. 14667-14677 ◽  
Author(s):  
Olaf Hübner ◽  
Hans-Jörg Himmel
Keyword(s):  
Quantum Chemical Calculations ◽  
Excited States ◽  
Configuration Interaction ◽  
Quantum Chemical ◽  
Matrix Isolation ◽  
Electronic States ◽  
Low Energy ◽  
Excited Electronic States ◽  
Complete Active Space ◽  
Self Consistent

The ground and excited electronic states of the vanadium dimer (V2) have been studied using Ne matrix isolation experiments and quantum chemical calculations (multireference configuration interaction based on complete active space self-consistent orbitals).

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