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All results from a given calculation for HCCOH (ethynol)

using model chemistry: QCISD/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 QCISD/6-31G
 hartrees
Energy at 0K-151.914627
Energy at 298.15K-151.914900
HF Energy-151.593761
Nuclear repulsion energy56.669615
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 QCISD/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' 3627 3495 48.38      
2 A' 3459 3333 54.74      
3 A' 2218 2137 40.99      
4 A' 1283 1237 125.60      
5 A' 981 945 68.85      
6 A' 596 574 49.68      
7 A' 254 245 10.18      
8 A" 507 489 54.23      
9 A" 208 200 3.61      

Unscaled Zero Point Vibrational Energy (zpe) 6566.5 cm-1
Scaled (by 0.9636) Zero Point Vibrational Energy (zpe) 6327.5 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 QCISD/6-31G
ABC
22.69277 0.30677 0.30268

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.138 0.000
C2 -0.167 1.350 0.000
O3 0.038 -1.222 0.000
H4 -0.250 2.418 0.000
H5 0.952 -1.573 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.22391.36062.29361.9584
C21.22392.58061.07083.1307
O31.36062.58063.65150.9795
H42.29361.07083.65154.1684
H51.95843.13070.97954.1684

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 176.560 C1 O3 H5 112.600
C2 C1 O3 173.732
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability