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All results from a given calculation for HCCOH (ethynol)

using model chemistry: QCISD(T)/cc-pVTZ

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(T)/cc-pVTZ
 hartrees
Energy at 0K-152.304671
Energy at 298.15K-152.305349
HF Energy-151.726384
Nuclear repulsion energy57.927919
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(T)/cc-pVTZ
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' 3816 3619        
2 A' 3488 3309        
3 A' 2238 2123        
4 A' 1282 1216        
5 A' 1063 1009        
6 A' 612 580        
7 A' 367 348        
8 A" 529 502        
9 A" 387 367        

Unscaled Zero Point Vibrational Energy (zpe) 6890.5 cm-1
Scaled (by 0.9486) Zero Point Vibrational Energy (zpe) 6536.3 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(T)/cc-pVTZ
ABC
22.02529 0.32147 0.31684

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.123 0.000
C2 0.105 1.326 0.000
O3 -0.188 -1.183 0.000
H4 0.203 2.383 0.000
H5 0.674 -1.615 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.20801.31972.26911.8639
C21.20802.52671.06112.9958
O31.31972.52673.58760.9639
H42.26911.06113.58764.0256
H51.86392.99580.96394.0256

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.704 C1 O3 H5 108.408
C2 C1 O3 176.784
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability