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All results from a given calculation for HCCOH (ethynol)

using model chemistry: QCISD/3-21G

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/3-21G
 hartrees
Energy at 0K-151.138622
Energy at 298.15K-151.139512
HF Energy-150.822841
Nuclear repulsion energy57.016082
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/3-21G
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' 3484 3376 25.96      
2 A' 3467 3361 62.87      
3 A' 2257 2187 43.61      
4 A' 1313 1273 114.10      
5 A' 1007 976 77.32      
6 A' 708 686 48.55      
7 A' 435 421 18.22      
8 A" 606 587 72.64      
9 A" 457 443 4.79      

Unscaled Zero Point Vibrational Energy (zpe) 6866.1 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 6654.7 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 QCISD/3-21G
ABC
20.97800 0.31186 0.30730

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.139 0.000
C2 0.318 1.310 0.000
O3 -0.364 -1.161 0.000
H4 0.572 2.345 0.000
H5 0.435 -1.752 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.21351.35032.27881.9404
C21.21352.56381.06553.0643
O31.35032.56383.62900.9941
H42.27881.06553.62904.0992
H51.94043.06430.99414.0992

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 178.581 C1 O3 H5 110.804
C2 C1 O3 179.538
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability