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All results from a given calculation for CH3CCH (propyne)

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

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-pVTZ
 hartrees
Energy at 0K-116.451307
Energy at 298.15K 
HF Energy-115.908709
Nuclear repulsion energy58.839647
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-pVTZ
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 3496 3326 57.36 35.39 0.21 0.34
2 A1 3089 2939 12.82 224.13 0.01 0.02
3 A1 2159 2054 4.18 116.23 0.13 0.23
4 A1 1415 1347 0.02 7.23 0.47 0.64
5 A1 957 910 0.49 6.37 0.03 0.06
6 E 3164 3010 3.31 63.68 0.75 0.86
6 E 3164 3010 3.31 63.68 0.75 0.86
7 E 1509 1436 8.64 5.34 0.75 0.86
7 E 1509 1436 8.64 5.34 0.75 0.86
8 E 1069 1017 0.15 0.22 0.75 0.86
8 E 1069 1017 0.15 0.22 0.75 0.86
9 E 647 616 45.32 2.03 0.75 0.86
9 E 647 616 45.32 2.03 0.75 0.86
10 E 326 310 7.33 3.03 0.75 0.86
10 E 326 310 7.33 3.03 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12272.8 cm-1
Scaled (by 0.9514) Zero Point Vibrational Energy (zpe) 11676.4 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-pVTZ
ABC
5.39749 0.28660 0.28660

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

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 1.423
H4 0.000 0.000 2.480
H5 0.000 1.016 -1.622
H6 0.880 -0.508 -1.622
H7 -0.880 -0.508 -1.622

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.45112.66133.71771.08661.08661.0866
C21.45111.21012.26652.09802.09802.0980
C32.66131.21011.05643.21063.21063.2106
H43.71772.26651.05644.22604.22604.2260
H51.08662.09803.21064.22601.76041.7604
H61.08662.09803.21064.22601.76041.7604
H71.08662.09803.21064.22601.76041.7604

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 110.710
C2 C1 H6 110.710 C2 C1 H7 110.710
C2 C3 H4 180.000 H5 C1 H6 108.205
H5 C1 H7 108.205 H6 C1 H7 108.205
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability