Abstract
Generalized valence bond (GVB) calculations are reported for the 3B 1, 1A 1, and 1B 1 states of the CH 2 molecule. The GVB method is discussed and compared with other multi-configuration and separated pair methods. The lowest singlet state ( 1A 1) is found to lie 0.50 eV about the lowest triplet state ( 3B 1) and the 1B 1- 1A 1 separation is found to be 1.40 eV.
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