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All results from a given calculation for CH3CCH (propyne)

using model chemistry: MP3=FULL/aug-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 MP3=FULL/aug-cc-pVDZ
 hartrees
Energy at 0K-116.318988
Energy at 298.15K 
HF Energy-115.876695
Nuclear repulsion energy58.116753
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 MP3=FULL/aug-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 3507 3507 53.40      
2 A1 3080 3080 16.40      
3 A1 2240 2240 5.29      
4 A1 1410 1410 0.50      
5 A1 951 951 0.91      
6 E 3162 3162 6.97      
6 E 3162 3162 6.97      
7 E 1477 1477 7.52      
7 E 1477 1477 7.52      
8 E 1052 1052 0.00      
8 E 1052 1052 0.00      
9 E 599 599 51.83      
9 E 599 599 51.83      
10 E 286 286 4.54      
10 E 286 286 4.54      

Unscaled Zero Point Vibrational Energy (zpe) 12170.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12170.9 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 MP3=FULL/aug-cc-pVDZ
ABC
5.25091 0.27940 0.27940

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/aug-cc-pVDZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.257
C2 0.000 0.000 0.219
C3 0.000 0.000 1.439
H4 0.000 0.000 2.511
H5 0.000 1.030 -1.641
H6 0.892 -0.515 -1.641
H7 -0.892 -0.515 -1.641

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.47612.69563.76811.09971.09971.0997
C21.47611.21952.29192.12662.12662.1266
C32.69561.21951.07243.24763.24763.2476
H43.76812.29191.07244.27824.27824.2782
H51.09972.12663.24764.27821.78481.7848
H61.09972.12663.24764.27821.78481.7848
H71.09972.12663.24764.27821.78481.7848

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 110.447
C2 C1 H6 110.447 C2 C1 H7 110.447
C2 C3 H4 180.000 H5 C1 H6 108.478
H5 C1 H7 108.478 H6 C1 H7 108.478
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability