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44 Ethene ... Pentane

From Dataset: S66: A Well-balanced Database of Benchmark Interaction Energies Relevant to Biomolecular Structure

Dataset reference: Řezáč, J., Riley, K.E., Hobza, P., J. Chem. Theory Comput. (2011), DOI: 10.1021/ct2002946

Optimization level: MP2/cc-pVTZ (interpolated CCSD(T)/CBS minimum)

Tags: dispersion pi-aliphatic


Structure:

23

C    0.666400380   0.183810777   0.419736827
H    1.228881823  -0.329883014   1.186259711
H    1.228035558   0.697208130  -0.347609893
C   -0.665973577   0.182973428   0.419611910
H   -1.227921712  -0.331498899   1.186103344
H   -1.228184271   0.695645746  -0.347748081
C   -2.532759951  -0.393659220   4.145342484
H   -2.562253394  -1.006680003   3.244152605
H   -2.568893900  -1.067879839   5.000959498
H   -3.433931308   0.217357208   4.162588429
C   -1.271323465   0.459016196   4.181160421
H   -1.271729330   1.079109767   5.080554365
H   -1.262935118   1.145924512   3.332100009
C   -0.000049204  -0.378541375   4.154217214
H   -0.000203259  -1.065214082   5.006049228
H    0.000091863  -1.006119212   3.257574722
C    1.271171203   0.459045054   4.181621751
H    1.271444205   1.078855805   5.081107161
H    1.262976378   1.146119704   3.332714124
C    2.532622583  -0.393679458   4.145797567
H    2.562246054  -1.006535957   3.244488389
H    3.433800693   0.217256710   4.163375606
H    2.568540944  -1.068135539   5.001303278

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Energies:

method counterpoise corrected remark value
CCSD(T)/CBS(aDZ) yes -2.005
CCSD(T)/CBS(haTZ) yes -1.988
CCSD(T)/CBS(haD->TZ) yes -1.993
MP2/cc-pVTZ yes -1.631
MP2/aug-cc-pVDZ yes -1.73
MP2/CBS yes -2.151
MP2C/CBS yes -2.076
SCS-MP2/CBS yes -1.28
SCS-MI-MP2/CBS yes -1.48
DW-MP2/CBS yes -1.448
MP3/CBS yes -1.773
MP2.5/CBS yes -1.962
CCSD/CBS yes -1.524
SCS-CCSD/CBS yes -2.078
SCS-MI-CCSD/CBS yes -2.131