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All results from a given calculation for HCCOH (ethynol)

using model chemistry: MP2/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G**
 hartrees
Energy at 0K-152.104561
Energy at 298.15K-152.105070
HF Energy-151.667233
Nuclear repulsion energy57.651820
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 MP2/6-31G**
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' 3864 3619 105.03      
2 A' 3571 3344 80.26      
3 A' 2255 2112 89.09      
4 A' 1267 1186 103.28      
5 A' 1077 1008 76.51      
6 A' 575 539 44.79      
7 A' 330 309 10.11      
8 A" 516 483 32.34      
9 A" 311 291 22.50      

Unscaled Zero Point Vibrational Energy (zpe) 6881.9 cm-1
Scaled (by 0.9365) Zero Point Vibrational Energy (zpe) 6444.9 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 MP2/6-31G**
ABC
21.88688 0.31817 0.31361

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.123 0.000
C2 0.149 1.330 0.000
O3 -0.226 -1.183 0.000
H4 0.285 2.382 0.000
H5 0.625 -1.642 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.21641.32532.27631.8722
C21.21642.54091.05993.0099
O31.32532.54093.60070.9667
H42.27631.05993.60074.0375
H51.87223.00990.96674.0375

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.657 C1 O3 H5 108.534
C2 C1 O3 177.237
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability