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GGF_10

tripeptide Gly-Gly-Phe, neutral, COOH and NH2 endings

From Dataset: Set of 5 small peptides containing aromatic side chain including set P26

Dataset reference: Valdes, H.; Pluháčková, K.; Pitoňák, M.; Řezáč, J. and Hobza, P. Phys. Chem. Chem. Phys., 2008, 10, 2747–2757

Optimization level: MP2/cc-pVTZ (RI (Resolution of Identity approximation))

Tags: 1 h-bond, NH-O


Structure:

37

O     -1.22591      4.22910      0.16959
C     -0.17734      3.42580      0.46890
O      0.74879      3.76919      1.16136
H     -1.04973      5.06816      0.62185
C     -0.37136      2.05192     -0.13553
H     -0.67942      2.17643     -1.17260
N      0.85680      1.31440     -0.14007
H      1.22572      0.95010      0.73531
C      1.36998      0.79876     -1.28381
O      0.95253      1.04473     -2.41081
C      2.51345     -0.17421     -1.02401
H      3.23377      0.26754     -0.33498
H      2.99551     -0.39091     -1.97148
N      2.01940     -1.40907     -0.44825
H      1.82578     -2.22423     -1.01439
C      1.70485     -1.52823      0.85328
O      1.81112     -0.61847      1.68073
C      1.22917     -2.91276      1.25624
H      0.42235     -2.76504      1.97658
H      2.05846     -3.37851      1.78897
N      0.87532     -3.72991      0.09950
H      0.94954     -4.71243      0.32326
H     -0.08939     -3.55295     -0.15658
C     -1.45372      1.31516      0.66843
H     -1.15353      1.30018      1.71932
H     -2.38151      1.88759      0.60679
C     -1.68951     -0.10033      0.20916
C     -1.99204     -1.08589      1.15400
H     -1.98609     -0.82887      2.20618
C     -2.31356     -2.38389      0.76090
H     -2.56553     -3.12591      1.50729
C     -2.31914     -2.71974     -0.59315
H     -2.58443     -3.72135     -0.90587
C     -1.98183     -1.75412     -1.54125
H     -1.96794     -2.00751     -2.59269
C     -1.67454     -0.45390     -1.14435
H     -1.41102      0.27642     -1.89741

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Energies:

method counterpoise corrected remark value
CCSD(T)/CBS (cc-pVTZ to cc-pVQZ extrapolation at MP2 level, CCSD(T) correction in 6-31G* basis set) no cc-pVTZ to cc-pVQZ extrapolation at MP2 level, CCSD(T) correction in 6-31G* basis set -0.11
MP2/CBS (cc-pVTZ to cc-pVQZ extrapolation) no cc-pVTZ to cc-pVQZ extrapolation -0.03
SCS-MP2/CBS (cc-pVTZ to cc-pVQZ extrapolation, SCS scaling factors: 6/5 and 1/3) no cc-pVTZ to cc-pVQZ extrapolation, SCS scaling factors: 6/5 and 1/3 -0.31
MP3/CBS (cc-pVTZ to cc-pVQZ extrapolation at MP2 level, MP3 correction in 6-31G* basis set) no cc-pVTZ to cc-pVQZ extrapolation at MP2 level, MP3 correction in 6-31G* basis set -0.24
SCC-DFTB-D no -0.39
AMBER ff99 (HF/6-31G* RESP charges) no HF/6-31G* RESP charges 1.39
AMBER ff99 (B3LYP/cc-pVTZ RESP charges) no B3LYP/cc-pVTZ RESP charges 0.8
DFT TPSS/6-311++G(3df,3pd) no -0.28
DFT-D TPSS/6-311++G(3df,3pd) no 0.12
DFT B3LYP/6-311++G(3df,3pd) no -0.62
DFT M06-2X/6-311+G(2df,2p) no 0.4
DFT BH&H/6-311++G(d,p) no 0.54
DFT-D PBE/6-311++G(3df,3pd) no -0.07