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All results from a given calculation for HCCOH (ethynol)

using model chemistry: HSEh1PBE/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 HSEh1PBE/3-21G
 hartrees
Energy at 0K-151.534449
Energy at 298.15K-151.535562
HF Energy-151.534449
Nuclear repulsion energy57.771267
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 HSEh1PBE/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' 3542 3412 72.12      
2 A' 3515 3386 67.36      
3 A' 2336 2250 79.53      
4 A' 1275 1228 102.83      
5 A' 1078 1039 118.77      
6 A' 816 786 52.44      
7 A' 491 473 27.67      
8 A" 730 703 87.23      
9 A" 540 520 1.76      

Unscaled Zero Point Vibrational Energy (zpe) 7160.6 cm-1
Scaled (by 0.9633) Zero Point Vibrational Energy (zpe) 6897.8 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 HSEh1PBE/3-21G
ABC
21.76393 0.32075 0.31609

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.131 0.000
C2 0.255 1.306 0.000
O3 -0.311 -1.154 0.000
H4 0.465 2.346 0.000
H5 0.492 -1.737 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.20321.32182.26311.9311
C21.20322.52481.05993.0523
O31.32182.52483.58440.9923
H42.26311.05993.58444.0823
H51.93113.05230.99234.0823

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.128 C1 O3 H5 112.348
C2 C1 O3 178.641
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability