return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for HCCOH (ethynol)

using model chemistry: TPSSh/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at TPSSh/6-31G(2df,p)
 hartrees
Energy at 0K-152.553828
Energy at 298.15K-152.554519
HF Energy-152.553828
Nuclear repulsion energy58.168521
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 TPSSh/6-31G(2df,p)
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' 3745 3614 82.28      
2 A' 3517 3394 86.74      
3 A' 2293 2213 113.53      
4 A' 1255 1211 83.43      
5 A' 1085 1047 84.80      
6 A' 616 595 48.30      
7 A' 387 373 8.30      
8 A" 530 512 39.30      
9 A" 383 370 23.40      

Unscaled Zero Point Vibrational Energy (zpe) 6905.4 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 6663.7 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 TPSSh/6-31G(2df,p)
ABC
22.16233 0.32464 0.31995

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.139 0.000
C2 -0.574 1.194 0.000
O3 0.406 -1.121 0.000
H4 -1.174 2.067 0.000
H5 1.367 -1.092 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.20091.32432.25771.8401
C21.20092.51431.05982.9993
O31.32432.51433.55900.9615
H42.25771.05983.55904.0551
H51.84012.99930.96154.0551

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 174.050 C1 O3 H5 106.139
C2 C1 O3 169.318
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability