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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-152.102129
Energy at 298.15K-152.102640
HF Energy-151.658691
Nuclear repulsion energy57.633864
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' 3742 3564 87.21      
2 A' 3516 3349 69.20      
3 A' 2294 2185 80.53      
4 A' 1307 1245 113.84      
5 A' 1075 1023 70.16      
6 A' 587 559 45.83      
7 A' 323 308 9.78      
8 A" 514 490 32.52      
9 A" 318 303 27.72      

Unscaled Zero Point Vibrational Energy (zpe) 6838.3 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 6512.1 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
21.62282 0.31845 0.31383

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 0.127 0.000
C2 0.166 1.325 0.000
O3 -0.241 -1.180 0.000
H4 0.321 2.381 0.000
H5 0.609 -1.655 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.21001.32882.27661.8827
C21.21002.53811.06663.0127
O31.32882.53813.60470.9734
H42.27661.06663.60474.0455
H51.88273.01270.97344.0455

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.521 C1 O3 H5 108.746
C2 C1 O3 177.447
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability