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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-152.121136
Energy at 298.15K-152.121701
HF Energy-151.668028
Nuclear repulsion energy57.719348
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
(Å4/u)
Dep P Dep U
1 A' 3885 3657 87.95      
2 A' 3549 3341 71.22      
3 A' 2296 2162 84.19      
4 A' 1292 1216 105.77      
5 A' 1077 1014 72.94      
6 A' 599 564 42.62      
7 A' 336 316 9.69      
8 A" 522 492 32.85      
9 A" 335 315 24.63      

Unscaled Zero Point Vibrational Energy (zpe) 6945.3 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 6538.3 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/6-31G**
ABC
21.91842 0.31891 0.31434

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 0.195 1.321 0.000
O3 -0.264 -1.175 0.000
H4 0.368 2.368 0.000
H5 0.571 -1.657 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.21021.32792.27151.8732
C21.21022.53761.06133.0020
O31.32792.53763.59880.9645
H42.27151.06133.59884.0306
H51.87323.00200.96454.0306

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.927 C1 O3 H5 108.565
C2 C1 O3 177.826
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability