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All results from a given calculation for HCCOH (ethynol)

using model chemistry: MP2/TZVP

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/TZVP
 hartrees
Energy at 0K-152.186293
Energy at 298.15K-152.186628
HF Energy-151.721638
Nuclear repulsion energy57.980148
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/TZVP
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' 3834 3634 126.54      
2 A' 3537 3353 89.42      
3 A' 2239 2123 126.37      
4 A' 1250 1185 87.61      
5 A' 1073 1017 86.85      
6 A' 562 533 55.03      
7 A' 285 271 9.22      
8 A" 504 478 47.53      
9 A" 223 212 18.92      

Unscaled Zero Point Vibrational Energy (zpe) 6753.5 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 6401.6 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 MP2/TZVP
ABC
22.00656 0.32220 0.31755

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.121 0.000
C2 0.027 1.330 0.000
O3 -0.124 -1.189 0.000
H4 0.074 2.388 0.000
H5 0.759 -1.579 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.20881.31632.26831.8622
C21.20882.52341.05972.9998
O31.31632.52343.58300.9655
H42.26831.05973.58304.0265
H51.86222.99980.96554.0265

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 178.751 C1 O3 H5 108.421
C2 C1 O3 175.859
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability