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All results from a given calculation for HCCOH (ethynol)

using model chemistry: B3LYP/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 B3LYP/6-31G*
 hartrees
Energy at 0K-152.531144
Energy at 298.15K-152.531821
Nuclear repulsion energy57.956975
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 B3LYP/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' 3701 3554 73.23      
2 A' 3516 3376 80.77      
3 A' 2303 2212 106.72      
4 A' 1268 1217 103.90      
5 A' 1091 1048 82.19      
6 A' 627 602 41.80      
7 A' 366 352 10.17      
8 A" 528 507 40.79      
9 A" 398 383 15.91      

Unscaled Zero Point Vibrational Energy (zpe) 6898.5 cm-1
Scaled (by 0.9603) Zero Point Vibrational Energy (zpe) 6624.6 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 B3LYP/6-31G*
ABC
22.04910 0.32226 0.31762

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.123 0.000
C2 0.081 1.326 0.000
O3 -0.169 -1.182 0.000
H4 0.170 2.387 0.000
H5 0.697 -1.625 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.20571.31662.26971.8817
C21.20572.52111.06413.0144
O31.31662.52113.58510.9725
H42.26971.06413.58514.0457
H51.88173.01440.97254.0457

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.064 C1 O3 H5 109.668
C2 C1 O3 176.476
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