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All results from a given calculation for CH3CCH (propyne)

using model chemistry: B2PLYP=FULLultrafine/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A'
Energy calculated at B2PLYP=FULLultrafine/STO-3G
 hartrees
Energy at 0K-115.025136
Energy at 298.15K 
HF Energy-114.954729
Nuclear repulsion energy58.022812
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 B2PLYP=FULLultrafine/STO-3G
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 3722 3722 113.36 27.52 0.30 0.46
2 A1 3342 3342 0.83 58.61 0.00 0.00
3 A1 2384 2384 6.22 26.07 0.29 0.45
4 A1 1586 1586 2.01 14.26 0.64 0.78
5 A1 988 988 2.46 4.15 0.29 0.46
6 E 3505 3505 0.05 36.42 0.75 0.86
6 E 3505 3505 0.05 36.42 0.75 0.86
7 E 1684 1684 4.49 18.00 0.75 0.86
7 E 1684 1684 4.49 18.00 0.75 0.86
8 E 1166 1166 2.87 0.11 0.75 0.86
8 E 1166 1166 2.87 0.11 0.75 0.86
9 E 756 756 16.54 0.06 0.75 0.86
9 E 756 756 16.54 0.06 0.75 0.86
10 E 353 353 2.42 4.75 0.75 0.86
10 E 353 353 2.42 4.75 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13474.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 13474.2 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 B2PLYP=FULLultrafine/STO-3G
ABC
5.23603 0.27782 0.27782

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/STO-3G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.263
C2 0.000 0.000 0.231
C3 0.000 0.000 1.438
H4 0.000 0.000 2.516
H5 0.000 1.032 -1.651
H6 0.894 -0.516 -1.651
H7 -0.894 -0.516 -1.651

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.49352.70083.77841.10271.10271.1027
C21.49351.20732.28482.14652.14652.1465
C32.70081.20731.07763.25733.25733.2573
H43.77842.28481.07764.29294.29294.2929
H51.10272.14653.25734.29291.78731.7873
H61.10272.14653.25734.29291.78731.7873
H71.10272.14653.25734.29291.78731.7873

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 110.639
C2 C1 H6 110.639 C2 C1 H7 110.639
C2 C3 H4 180.000 H5 C1 H6 108.279
H5 C1 H7 108.279 H6 C1 H7 108.279
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability