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All results from a given calculation for HCCOH (ethynol)

using model chemistry: MP2/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/3-21G
 hartrees
Energy at 0K-151.124016
Energy at 298.15K-151.124872
HF Energy-150.822537
Nuclear repulsion energy57.035772
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 MP2/3-21G
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' 3523 3363 51.52      
2 A' 3510 3350 67.60      
3 A' 2225 2124 54.81      
4 A' 1299 1240 114.39      
5 A' 1019 972 87.47      
6 A' 680 649 54.56      
7 A' 434 415 19.41      
8 A" 582 556 69.95      
9 A" 447 427 7.90      

Unscaled Zero Point Vibrational Energy (zpe) 6859.3 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 6547.2 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 MP2/3-21G
ABC
21.18098 0.31196 0.30744

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.135 0.000
C2 0.300 1.316 0.000
O3 -0.348 -1.164 0.000
H4 0.532 2.352 0.000
H5 0.454 -1.750 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.21841.34542.27951.9396
C21.21842.56371.06143.0705
O31.34542.56373.62470.9935
H42.27951.06143.62474.1031
H51.93963.07050.99354.1031

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 178.358 C1 O3 H5 111.157
C2 C1 O3 179.258
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability