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Multireference configuration interaction and second-order perturbation theory calculations for the 1 3A″, 1 1A″, and 1 1A′ electronic states of vinylnitrene and vinylphosphinidene

✍ Scribed by Vudhichai Parasuk; Christopher J. Cramer

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
626 KB
Volume
260
Category
Article
ISSN
0009-2614

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✦ Synopsis

MRCI and CASP'I2 calculations from a (4, 4) MCSCF active space predict both vinylnitrene and vinylphosphinidene to have 3~, ground states. For vinylnitrene, the lowest open-shell singlet (1K') and closed-shell singlet 0A') states lie 15 and 40 kcal/mol higher in energy, respectively. The corresponding relative singlet energies in vinylphosphinidene are 17 and 23 kcal/mol, respectively. The reduced separation between the singlet states in H2C=CHP compared to H2C=CHN is attributed to decreased conjugation between the double bond and the pnictogen atom in the phosphinidene.

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