scholarly journals Population transfer of HF molecules in the ground electronic state through multiphoton transition

2013 ◽  
Vol 62 (9) ◽  
pp. 093301
Author(s):  
Wang Rong ◽  
Xiu Jun-Ling ◽  
Niu Ying-Yu
Keyword(s):  
Electronic State ◽  
Ground Electronic State ◽  
Population Transfer ◽  
Multiphoton Transition

Ab initio calculations of the properties of NO + in its ground electronic state X 1 Σ +

1993 ◽  
Vol 215 (6) ◽  
pp. 565-570 ◽  
Author(s):  
M. Fehér ◽  
P.A. Martin
Keyword(s):  
Ab Initio Calculations ◽  
Ab Initio ◽  
Electronic State ◽  
Ground Electronic State

The Diode Laser Infrared Spectrum of the Arsenic Monoxide Radical in Its Ground Electronic State (2Π)

1995 ◽  
Vol 170 (1) ◽  
pp. 152-157 ◽  
Author(s):  
K. Essig ◽  
H. Jones ◽  
F. Ito ◽  
H. Takeo
Keyword(s):  
Infrared Spectrum ◽  
Electronic State ◽  
Diode Laser ◽  
Ground Electronic State

The gauche Effect. A Theoretical Study of the Topomerization (Degenerate Racemization) and Tautomerization of Methoxide Ion Tautomer

1973 ◽  
Vol 51 (15) ◽  
pp. 2423-2432 ◽  
Author(s):  
Saul Wolfe ◽  
Luis M. Tel ◽  
I. G. Csizmadia
Keyword(s):  
Electronic State ◽  
Ground Electronic State ◽  
Conformational Transformation ◽  
Molecular Orbital Calculations ◽  
Rotational Angle ◽  
Electron Pairs ◽  
Hydroxyl Proton ◽  
Gauche Effect ◽  
Internuclear Distances ◽  
Relationship Of

Non-empirical double zeta quality molecular orbital calculations on −CH2OH as a function of the C—O bond length (r), the rotational angle about the C—O bond (θ), and the pyramidal angle at carbon [Formula: see text] are described. From the stretching potential curve, E(r), it is shown that dissociation of −CH2OH proceeds to give CH2 and OH−. The rotation–inversion surface, [Formula: see text], has two types of minima; in both cases the most favorable pyramidal angle at carbon is 105°. The lower minimum corresponds to a structure (the Y conformation) having the hydroxyl proton on the external bisector of the HCH angle. The higher minimum is 6.67 kcal/mol less stable and corresponds to a structure (the W conformation) having the hydroxyl proton on the internal bisector of the HCH angle. The relationship of these results to the gauche effect is discussed and it is noted that at certain internuclear distances the nuclear–nuclear repulsion term (Enucl) may overcome the tendency of adjacent electron pairs and polar bonds to exist preferentially in that conformation which has the maximum number of gauche interactions between these electron pairs or polar bonds.The topomerization of −CH2OH, i.e., the conformational transformation from one Y conformation into another, proceeds, via the W conformation as an intermediate, by two separate events, viz. rotation about the C—O bond, having a barrier of 10.58 kcal/mol, and pyramidal inversion at carbon, with a barrier of 20.52 kcal/mol. Some factors governing the relative importance of rotation and inversion in degenerate racemization are discussed.In its ground electronic state CH3O− is 22.18 kcal/mol more stable than −CH2OH. However, in the low-lying excited states all conformations of −CH2OH are stabilized relative to CH3O−. The most stable excited state structure of −CH2OH corresponds to the energy maximum for rotation–inversion of the ground electronic state.

Quantum dynamics of the photostability of pyrazine

2015 ◽  
Vol 17 (44) ◽  
pp. 29518-29530 ◽  
Author(s):  
Matthieu Sala ◽  
Stéphane Guérin ◽  
Fabien Gatti
Keyword(s):  
Electronic State ◽  
Ground State ◽  
Quantum Dynamics ◽  
Ground Electronic State ◽  
Conical Intersection ◽  
Radiationless Decay

We propose a new mechanism for the radiationless decay of photoexcited pyrazine to its ground electronic state involving a conical intersection between the dark Au(nπ) state and the ground state.

Microwave spectrum of HSiO in the X2A′ ground electronic state

1997 ◽  
Vol 413-414 ◽  
pp. 527-535 ◽  
Author(s):  
Mitsuaki Izuha ◽  
Satoshi Yamamoto ◽  
Shuji Saito
Keyword(s):  
Electronic State ◽  
Microwave Spectrum ◽  
Ground Electronic State

Direct photoionization measurements of slow decay rates of vibrationally overexcited (CF3)3CI molecules in the ground electronic state in a beam

1986 ◽  
Vol 127 (5) ◽  
pp. 438-444 ◽  
Author(s):  
V.M. Apatin ◽  
V.S. Letokhov ◽  
V.N. Lokhman ◽  
G.N. Makarov ◽  
V.N. Bagratashvili ◽  
...  
Keyword(s):  
Electronic State ◽  
Decay Rates ◽  
Ground Electronic State ◽  
Slow Decay
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