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All results from a given calculation for CH3CCH (propyne)

using model chemistry: MP2=FULL/aug-cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A'
Energy calculated at MP2=FULL/aug-cc-pVQZ
 hartrees
Energy at 0K-116.516951
Energy at 298.15K 
HF Energy-115.915552
Nuclear repulsion energy58.889774
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at MP2=FULL/aug-cc-pVQZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3518 3365 57.20 36.63 0.20 0.34
2 A1 3095 2960 12.10 223.03 0.01 0.02
3 A1 2165 2070 4.54 115.35 0.12 0.22
4 A1 1423 1360 0.00 6.90 0.47 0.64
5 A1 958 916 0.45 6.47 0.03 0.06
6 E 3182 3043 2.90 63.06 0.75 0.86
6 E 3182 3043 2.90 63.06 0.75 0.86
7 E 1502 1436 9.02 5.27 0.75 0.86
7 E 1502 1436 9.02 5.27 0.75 0.86
8 E 1062 1016 0.21 0.21 0.75 0.86
8 E 1062 1016 0.21 0.21 0.75 0.86
9 E 674 645 44.23 2.01 0.75 0.86
9 E 674 645 44.23 2.01 0.75 0.86
10 E 335 320 8.34 2.77 0.75 0.86
10 E 335 320 8.34 2.77 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12334.2 cm-1
Scaled (by 0.9564) Zero Point Vibrational Energy (zpe) 11796.4 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at MP2=FULL/aug-cc-pVQZ
ABC
5.41060 0.28706 0.28706

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/aug-cc-pVQZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.238
C2 0.000 0.000 0.213
C3 0.000 0.000 1.421
H4 0.000 0.000 2.480
H5 0.000 1.015 -1.621
H6 0.879 -0.508 -1.621
H7 -0.879 -0.508 -1.621

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.45062.65893.71751.08501.08501.0850
C21.45061.20842.26692.09592.09592.0959
C32.65891.20841.05853.20693.20693.2069
H43.71752.26691.05854.22444.22444.2244
H51.08502.09593.20694.22441.75831.7583
H61.08502.09593.20694.22441.75831.7583
H71.08502.09593.20694.22441.75831.7583

picture of propyne state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 180.000 C2 C1 H5 110.676
C2 C1 H6 110.676 C2 C1 H7 110.676
C2 C3 H4 180.000 H5 C1 H6 108.240
H5 C1 H7 108.240 H6 C1 H7 108.240
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability