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All results from a given calculation for HCCOH (ethynol)

using model chemistry: CCD/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCD/STO-3G
 hartrees
Energy at 0K-149.901465
Energy at 298.15K-149.902112
HF Energy-149.684369
Nuclear repulsion energy56.007841
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 CCD/STO-3G
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' 3689 3689 29.67      
2 A' 3660 3660 90.28      
3 A' 2413 2413 2.10      
4 A' 1500 1500 26.29      
5 A' 1003 1003 8.63      
6 A' 727 727 11.72      
7 A' 375 375 5.98      
8 A" 685 685 14.44      
9 A" 382 382 0.53      

Unscaled Zero Point Vibrational Energy (zpe) 7216.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7216.8 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 CCD/STO-3G
ABC
17.95487 0.30227 0.29726

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.149 0.000
C2 0.014 1.361 0.000
O3 -0.123 -1.246 0.000
H4 0.036 2.446 0.000
H5 0.862 -1.542 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.21201.40062.29681.8981
C21.21202.61071.08483.0243
O31.40062.61073.69511.0284
H42.29681.08483.69514.0721
H51.89813.02431.02844.0721

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.486 C1 O3 H5 101.688
C2 C1 O3 175.631
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability