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All results from a given calculation for CH3CCH (propyne)

using model chemistry: MP4=FULL/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 MP4=FULL/daug-cc-pVDZ
 hartrees
Energy at 0K-116.345476
Energy at 298.15K 
HF Energy-115.875016
Nuclear repulsion energy57.808470
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 MP4=FULL/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 3457 3457        
2 A1 3036 3036        
3 A1 2114 2114        
4 A1 1394 1394        
5 A1 932 932        
6 E 3121 3121        
6 E 3121 3121        
7 E 1466 1466        
7 E 1466 1466        
8 E 1039 1039        
8 E 1039 1039        
9 E 550 550        
9 E 550 550        
10 E 257 257        
10 E 257 257        

Unscaled Zero Point Vibrational Energy (zpe) 11898.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 11898.9 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 MP4=FULL/daug-cc-pVDZ
ABC
5.22561 0.27642 0.27642

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/daug-cc-pVDZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.262
C2 0.000 0.000 0.216
C3 0.000 0.000 1.449
H4 0.000 0.000 2.524
H5 0.000 1.033 -1.648
H6 0.895 -0.516 -1.648
H7 -0.895 -0.516 -1.648

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.47802.71153.78641.10261.10261.1026
C21.47801.23352.30842.13092.13092.1309
C32.71151.23351.07493.26503.26503.2650
H43.78642.30841.07494.29824.29824.2982
H51.10262.13093.26504.29821.78911.7891
H61.10262.13093.26504.29821.78911.7891
H71.10262.13093.26504.29821.78911.7891

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 110.481
C2 C1 H6 110.481 C2 C1 H7 110.481
C2 C3 H4 180.000 H5 C1 H6 108.443
H5 C1 H7 108.443 H6 C1 H7 108.443
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability