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All results from a given calculation for CH3CCH (propyne)

using model chemistry: MP2/TZVP

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/TZVP
 hartrees
Energy at 0K-116.321987
Energy at 298.15K-116.323758
HF Energy-115.904619
Nuclear repulsion energy58.618048
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/TZVP
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 3519 3336 53.84      
2 A1 3095 2934 16.31      
3 A1 2165 2053 2.01      
4 A1 1439 1364 0.08      
5 A1 948 899 0.91      
6 E 3181 3016 7.28      
6 E 3181 3016 7.28      
7 E 1504 1425 8.14      
7 E 1504 1425 8.14      
8 E 1066 1011 0.00      
8 E 1066 1011 0.00      
9 E 527 499 58.32      
9 E 527 499 58.32      
10 E 116 110 0.17      
10 E 116 110 0.17      

Unscaled Zero Point Vibrational Energy (zpe) 11978.0 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 11354.0 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/TZVP
ABC
5.36456 0.28425 0.28425

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/TZVP

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.244
C2 0.000 0.000 0.215
C3 0.000 0.000 1.428
H4 0.000 0.000 2.490
H5 0.000 1.019 -1.628
H6 0.883 -0.510 -1.628
H7 -0.883 -0.510 -1.628

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.45942.67253.73401.08941.08941.0894
C21.45941.21302.27452.10662.10662.1066
C32.67251.21301.06153.22213.22213.2221
H43.73402.27451.06154.24234.24234.2423
H51.08942.10663.22214.24231.76581.7658
H61.08942.10663.22214.24231.76581.7658
H71.08942.10663.22214.24231.76581.7658

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 110.643
C2 C1 H6 110.643 C2 C1 H7 110.643
C2 C3 H4 180.000 H5 C1 H6 108.275
H5 C1 H7 108.275 H6 C1 H7 108.275
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability