Assessment of the Accuracy of Shape-Consistent Relativistic Effective Core Potentials Using Multireference Spin−Orbit Configuration Interaction Singles and Doubles Calculations of the Ground and Low-Lying Excited States of U4+and U5+†

2009 ◽  
Vol 113 (45) ◽  
pp. 12626-12631 ◽  
Author(s):  
Eric V. Beck ◽  
Scott R. Brozell ◽  
Jean-Philippe Blaudeau ◽  
Larry W. Burggraf ◽  
Russell M. Pitzer
Keyword(s):  
Excited States ◽  
Configuration Interaction ◽  
Spin Orbit ◽  
Effective Core Potentials

The Importance of Photodissociative Trichloromethanol for Atmospheric Chemistry

2003 ◽  
Vol 68 (12) ◽  
pp. 2297-2308 ◽  
Author(s):  
Max Mühlhäuser ◽  
Melanie Schnell ◽  
Sigrid D. Peyerimhoff
Keyword(s):  
Energy Range ◽  
Excited States ◽  
Atmospheric Chemistry ◽  
Configuration Interaction ◽  
Configuration Interaction Calculations

Multireference configuration interaction calculations are carried out for ground and excited states of trichloromethanol to investigate two important photofragmentation processes relevant to atmospheric chemistry. For CCl3OH five low-lying excited states in the energy range between 6.1 and 7.1 eV are found to be highly repulsive for C-Cl elongation leading to Cl2COH (X2A') and Cl (X2P). Photodissociation along C-O cleavage resulting in Cl3C (X2A') and OH (X2Π) has to overcome a barrier of about 0.8 eV (13A'', 11A'') and 1.2 eV (13A') because the low-lying excited states 11A'', 13A' and 13A'' become repulsive only after elongating the C-O bond by about 0.3 Å.

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