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All results from a given calculation for HCCOH (ethynol)

using model chemistry: MP2/CEP-121G*

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/CEP-121G*
 hartrees
Energy at 0K-28.170401
Energy at 298.15K-28.171001
HF Energy-27.738900
Nuclear repulsion energy30.407566
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/CEP-121G*
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' 3760 3582 106.94      
2 A' 3496 3331 77.96      
3 A' 2193 2089 109.07      
4 A' 1281 1221 114.83      
5 A' 1049 1000 70.57      
6 A' 615 586 61.88      
7 A' 329 313 9.30      
8 A" 536 511 68.59      
9 A" 360 343 5.75      

Unscaled Zero Point Vibrational Energy (zpe) 6809.1 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 6487.7 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/CEP-121G*
ABC
21.46436 0.31450 0.30996

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.124 0.000
C2 -0.009 1.346 0.000
O3 -0.095 -1.207 0.000
H4 0.012 2.413 0.000
H5 0.808 -1.575 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.22191.33502.28911.8810
C21.22192.55491.06743.0328
O31.33502.55493.62220.9750
H42.28911.06743.62224.0664
H51.88103.03280.97504.0664

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 178.406 C1 O3 H5 108.022
C2 C1 O3 175.460
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability