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All results from a given calculation for CH3CCH (propyne)

using model chemistry: QCISD(T)=FULL/daug-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 QCISD(T)=FULL/daug-cc-pVTZ
 hartrees
Energy at 0K-116.501618
Energy at 298.15K 
HF Energy-115.909078
Nuclear repulsion energy58.712724
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 QCISD(T)=FULL/daug-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 3438 3438        
2 A1 3059 3059        
3 A1 2182 2182        
4 A1 1374 1374        
5 A1 943 943        
6 E 3116 3116        
6 E 3116 3116        
7 E 1495 1495        
7 E 1495 1495        
8 E 1060 1060        
8 E 1060 1060        
9 E 624 624        
9 E 624 624        
10 E 313 313        
10 E 313 313        

Unscaled Zero Point Vibrational Energy (zpe) 12105.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12105.5 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 QCISD(T)=FULL/daug-cc-pVTZ
ABC
5.37922 0.28515 0.28515

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/daug-cc-pVTZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.242
C2 0.000 0.000 0.217
C3 0.000 0.000 1.425
H4 0.000 0.000 2.485
H5 0.000 1.018 -1.629
H6 0.882 -0.509 -1.629
H7 -0.882 -0.509 -1.629

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.45922.66713.72741.08911.08911.0891
C21.45921.20792.26822.10822.10822.1082
C32.66711.20791.06033.21913.21913.2191
H43.72742.26821.06034.23834.23834.2383
H51.08912.10823.21914.23831.76341.7634
H61.08912.10823.21914.23831.76341.7634
H71.08912.10823.21914.23831.76341.7634

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 110.805
C2 C1 H6 110.805 C2 C1 H7 110.805
C2 C3 H4 180.000 H5 C1 H6 108.105
H5 C1 H7 108.105 H6 C1 H7 108.105
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability