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All results from a given calculation for HCCOH (ethynol)

using model chemistry: QCISD(T)/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 QCISD(T)/6-31G*
 hartrees
Energy at 0K-152.116852
Energy at 298.15K-152.117152
HF Energy-151.657740
Nuclear repulsion energy57.481777
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 QCISD(T)/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' 3708 3557        
2 A' 3497 3355        
3 A' 2257 2165        
4 A' 1297 1244        
5 A' 1061 1017        
6 A' 552 529        
7 A' 280 268        
8 A" 492 472        
9 A" 227 218        

Unscaled Zero Point Vibrational Energy (zpe) 6684.8 cm-1
Scaled (by 0.9593) Zero Point Vibrational Energy (zpe) 6412.8 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 QCISD(T)/6-31G*
ABC
21.54751 0.31674 0.31215

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.125 0.000
C2 0.109 1.336 0.000
O3 -0.194 -1.191 0.000
H4 0.223 2.398 0.000
H5 0.676 -1.633 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.21521.33102.28311.8840
C21.21522.54521.06793.0227
O31.33102.54523.61310.9754
H42.28311.06793.61314.0561
H51.88403.02270.97544.0561

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 178.972 C1 O3 H5 108.564
C2 C1 O3 176.756
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability