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Pyrazine dimer

MP2/CBS extrapolation: aug-cc-pVTZ to aug-cc-pVQZ, CCSD(T) correction in modified (see orig. paper) cc-pVTZ basis set

From Dataset: S22 – benchmark noncovalent complexes

Dataset reference: P. Jurecka, J. Sponer, J. Cerny, P. Hobza; Phys Chem Chem Phys 2006, 8 (17), 1985-1993

Optimization level: MP2/cc-pVTZ

Tags: Complex,S22, S26,dispersion bonded


Structure:

20

C    -1.2471894   -1.1718212   -0.6961388
C    -1.2471894   -1.1718212    0.6961388
N    -0.2589510   -1.7235771    1.4144796
C     0.7315327   -2.2652221    0.6967288
C     0.7315327   -2.2652221   -0.6967288
N    -0.2589510   -1.7235771   -1.4144796
H    -2.0634363   -0.7223199   -1.2472797
H    -2.0634363   -0.7223199    1.2472797
H     1.5488004   -2.7128282    1.2475604
H     1.5488004   -2.7128282   -1.2475604
C    -0.3380031    2.0800608    1.1300452
C     0.8540254    1.3593471    1.1306308
N     1.4701787    0.9907598    0.0000000
C     0.8540254    1.3593471   -1.1306308
C    -0.3380031    2.0800608   -1.1300452
N    -0.9523059    2.4528836    0.0000000
H    -0.8103758    2.3643033    2.0618643
H     1.3208583    1.0670610    2.0623986
H     1.3208583    1.0670610   -2.0623986
H    -0.8103758    2.3643033   -2.0618643
    

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Energies:

method counterpoise corrected remark value
MP2/CBS yes -6.9
CCSD(T)/CBS yes -4.42