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All results from a given calculation for CH3CCH (propyne)

using model chemistry: CID/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 CID/daug-cc-pVDZ
 hartrees
Energy at 0K-116.265032
Energy at 298.15K 
HF Energy-115.878083
Nuclear repulsion energy58.352399
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 CID/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 3543 3543 58.58      
2 A1 3121 3121 17.34      
3 A1 2279 2279 4.63      
4 A1 1443 1443 0.68      
5 A1 963 963 1.23      
6 E 3203 3203 7.74      
6 E 3203 3203 7.74      
7 E 1509 1509 7.63      
7 E 1509 1509 7.63      
8 E 1078 1078 0.00      
8 E 1078 1078 0.00      
9 E 643 643 50.57      
9 E 643 643 50.57      
10 E 317 317 6.30      
10 E 316 316 6.30      

Unscaled Zero Point Vibrational Energy (zpe) 12423.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12423.5 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 CID/daug-cc-pVDZ
ABC
5.28884 0.28158 0.28158

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.253
C2 0.000 0.000 0.221
C3 0.000 0.000 1.433
H4 0.000 0.000 2.501
H5 0.000 1.027 -1.635
H6 0.889 -0.513 -1.635
H7 -0.889 -0.513 -1.635

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.47302.68503.75351.09561.09561.0956
C21.47301.21202.28052.12032.12032.1203
C32.68501.21201.06853.23453.23453.2345
H43.75352.28051.06854.26124.26124.2612
H51.09562.12033.23454.26121.77841.7784
H61.09562.12033.23454.26121.77841.7784
H71.09562.12033.23454.26121.77841.7784

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 110.414
C2 C1 H6 110.414 C2 C1 H7 110.414
C2 C3 H4 180.000 H5 C1 H6 108.512
H5 C1 H7 108.512 H6 C1 H7 108.512
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability