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All results from a given calculation for HCCOH (ethynol)

using model chemistry: MP4/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP4/6-31G*
 hartrees
Energy at 0K-152.117545
Energy at 298.15K-152.117802
HF Energy-151.657365
Nuclear repulsion energy57.450563
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 MP4/6-31G*
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' 3712 3544        
2 A' 3507 3348        
3 A' 2231 2131        
4 A' 1290 1232        
5 A' 1061 1013        
6 A' 544 519        
7 A' 277 264        
8 A" 490 468        
9 A" 205 195        

Unscaled Zero Point Vibrational Energy (zpe) 6658.0 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 6357.0 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 MP4/6-31G*
ABC
21.58194 0.31634 0.31177

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.124 0.000
C2 0.084 1.339 0.000
O3 -0.174 -1.195 0.000
H4 0.181 2.402 0.000
H5 0.702 -1.624 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.21811.33002.28521.8838
C21.21812.54691.06733.0269
O31.33002.54693.61420.9754
H42.28521.06733.61424.0596
H51.88383.02690.97544.0596

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 178.737 C1 O3 H5 108.614
C2 C1 O3 176.463
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability