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All results from a given calculation for HCCOH (ethynol)

using model chemistry: MP2/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G*
 hartrees
Energy at 0K-152.085492
Energy at 298.15K-152.085928
HF Energy-151.657945
Nuclear repulsion energy57.576968
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 MP2/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3737 3524 109.84      
2 A' 3550 3347 80.09      
3 A' 2253 2125 85.23      
4 A' 1285 1212 113.89      
5 A' 1075 1014 73.20      
6 A' 561 529 48.04      
7 A' 314 296 10.23      
8 A" 507 478 32.26      
9 A" 284 268 25.15      

Unscaled Zero Point Vibrational Energy (zpe) 6782.8 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 6396.2 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 MP2/6-31G*
ABC
21.66302 0.31777 0.31318

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.129 0.000
C2 -0.357 1.291 0.000
O3 0.214 -1.187 0.000
H4 -0.749 2.278 0.000
H5 1.175 -1.307 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.21571.33352.27571.8561
C21.21572.54321.06183.0166
O31.33352.54323.59640.9687
H42.27571.06183.59644.0691
H51.85613.01660.96874.0691

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 175.386 C1 O3 H5 106.380
C2 C1 O3 172.184
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability