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All results from a given calculation for HCCOH (ethynol)

using model chemistry: MP2=FULL/STO-3G

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=FULL/STO-3G
 hartrees
Energy at 0K-149.876095
Energy at 298.15K-149.876721
HF Energy-149.684645
Nuclear repulsion energy56.251038
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=FULL/STO-3G
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' 3868 3438 13.57      
2 A' 3752 3335 119.65      
3 A' 2359 2097 8.03      
4 A' 1493 1327 32.66      
5 A' 1035 920 14.59      
6 A' 710 631 14.66      
7 A' 376 335 6.85      
8 A" 653 581 17.74      
9 A" 379 337 0.84      

Unscaled Zero Point Vibrational Energy (zpe) 7312.1 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 6499.7 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=FULL/STO-3G
ABC
18.48468 0.30463 0.29969

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.141 0.000
C2 -0.025 1.360 0.000
O3 -0.088 -1.240 0.000
H4 -0.038 2.437 0.000
H5 0.889 -1.522 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.21861.38462.29591.8867
C21.21862.60091.07743.0237
O31.38462.60093.67781.0171
H42.29591.07743.67784.0667
H51.88673.02371.01714.0667

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.544 C1 O3 H5 102.467
C2 C1 O3 175.200
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability