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All results from a given calculation for CH3CCH (propyne)

using model chemistry: MP2/daug-cc-pVDZ

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/daug-cc-pVDZ
 hartrees
Energy at 0K-116.290875
Energy at 298.15K 
HF Energy-115.875253
Nuclear repulsion energy57.935393
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/daug-cc-pVDZ
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 3485 3485 54.54 40.32 0.21 0.35
2 A1 3069 3069 16.84 229.76 0.01 0.02
3 A1 2123 2123 3.24 114.65 0.12 0.22
4 A1 1397 1397 0.43 7.15 0.48 0.65
5 A1 946 946 0.83 7.63 0.04 0.07
6 E 3161 3161 5.54 66.77 0.75 0.86
6 E 3161 3161 5.54 66.77 0.75 0.86
7 E 1473 1473 7.79 5.82 0.75 0.86
7 E 1473 1473 7.79 5.82 0.75 0.86
8 E 1045 1045 0.01 0.12 0.75 0.86
8 E 1045 1045 0.01 0.12 0.75 0.86
9 E 556 556 51.31 1.33 0.75 0.86
9 E 556 556 51.31 1.33 0.75 0.86
10 E 267 267 3.07 3.76 0.75 0.86
10 E 267 267 3.07 3.76 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12010.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12010.5 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/daug-cc-pVDZ
ABC
5.25492 0.27773 0.27773

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/daug-cc-pVDZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.258
C2 0.000 0.000 0.213
C3 0.000 0.000 1.447
H4 0.000 0.000 2.520
H5 0.000 1.030 -1.644
H6 0.892 -0.515 -1.644
H7 -0.892 -0.515 -1.644

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.47162.70503.77791.10011.10011.1001
C21.47161.23342.30632.12442.12442.1244
C32.70501.23341.07293.25843.25843.2584
H43.77792.30631.07294.28974.28974.2897
H51.10012.12443.25844.28971.78411.7841
H61.10012.12443.25844.28971.78411.7841
H71.10012.12443.25844.28971.78411.7841

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 110.559
C2 C1 H6 110.559 C2 C1 H7 110.559
C2 C3 H4 180.000 H5 C1 H6 108.362
H5 C1 H7 108.362 H6 C1 H7 108.362
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability