The transferability of the dynamic correlation energy in conjugated molecules
β Scribed by Renato Colle; Alessandro Curioni
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 439 KB
- Volume
- 221
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
The dynamic correlation energy of the ground state of organic conjugated molecules -calculated using the Colle-Salvetti functional -has been decomposed into fragment contributions obtained by integrating the functional inside separate fragment volumes defined as proposed by Bader. It is shown that these contributions, properly renormalized, can be utilized for predicting in a satisfactory way the total correlation energy of oligomers obtained through the condensation of pyrrcle and metbane molecules.
If these requirements are satisfied, one can write
π SIMILAR VOLUMES
The second-order connected moments expansion (CMX( 2)) approach to calculation of the correlation energy is tested numerically on several closed-shell di-and tri-atomic molecules. Benchmark computations performed within 6-31G\*\* basis set reveal that CMX( 2) usually recovers more than SO?+ of the M
An expression is developed for the probability of intermolecular energy transfer Pin polar molecules for particular orientations on the basis of the Lennard-Jones-dipole-quadrupole interaction energy. The temperature dependence of P is briefly discussed. In calculating the probability of intermolec
Recehrd 31 Octooer 197E;in tinal form IS Deccmbcr I978 The eftkct at'quz~drupiy exited contigurations throu$i the fourth order of MB RSPT on the correlation energy of molrcules is studied-The correlation energy of the BH, Hz0 and X2 moIecuIes is c&x&ted in such a way that the second pIus third order