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methane dimer (0.9)

MP2/CBS extrapolation: cc-pVQZ to cc-pV5Z, CCSD(T) correction in cc-pVQZ basis set

From Dataset: S22x5: S22 in nonequilibrium geometries

Dataset reference: L. Gráfová, M. Pitoňák, J. Řezáč, P. Hobza; J. Chem. Thory Comput. 2010, ASAP article

Optimization level: CCSD(T)/cc-pVTZ (shifted along axis of monomer centers of mass to 0.9 original intermolecular distance)

Tags: Complex, S22x5, dispersion bonded, shifted, shorter


Structure:

10

C 0.000000000 0.000000000 0.000000000
H 0.364514644 0.513239461 -0.888512354
H 0.364514644 0.513105641 0.888589641
H 0.364215723 -1.026226426 -0.000077278
H -1.089122980 0.000311014 0.000000023
C 3.346489810 0.000000000 0.000000000
H 4.435612789 -0.000311014 -0.000000023
H 2.981975165 -0.513105641 -0.888589641
H 2.981975165 -0.513239461 0.888512354
H 2.982274086 1.026226426 0.000077278

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Energies:

method counterpoise corrected remark value
CCSD(T)/CBS yes -0.34