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All results from a given calculation for HOCO (Hydrocarboxyl radical)

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

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no CS cis 1A'
1 2 yes CS trans 1A'

Conformer 1 (CS cis)

Jump to S1C2
Energy calculated at QCISD/6-31G**
 hartrees
Energy at 0K-188.611201
Energy at 298.15K-188.612295
HF Energy-188.131127
Nuclear repulsion energy62.748700
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/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' 3742 3523 29.22      
2 A' 1876 1766 262.79      
3 A' 1331 1253 0.23      
4 A' 1108 1043 189.61      
5 A' 599 564 38.85      
6 A" 598 562 133.93      

Unscaled Zero Point Vibrational Energy (zpe) 4626.4 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 4355.3 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/6-31G**
ABC
4.56762 0.38864 0.35817

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.452 0.000
O2 -1.070 -0.354 0.000
O3 1.164 0.174 0.000
H4 -0.753 -1.274 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.33911.19661.8828
O21.33912.29520.9735
O31.19662.29522.4020
H41.88280.97352.4020

picture of Hydrocarboxyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 H4 107.961 O2 C1 O3 129.599
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at QCISD/6-31G**
 hartrees
Energy at 0K-188.612460
Energy at 298.15K-188.613516
HF Energy-188.130478
Nuclear repulsion energy62.453493
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/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' 3893 3665 99.62      
2 A' 1917 1805 181.90      
3 A' 1274 1199 268.99      
4 A' 1104 1040 60.94      
5 A' 615 579 5.34      
6 A" 531 500 98.89      

Unscaled Zero Point Vibrational Energy (zpe) 4667.2 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 4393.7 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/6-31G**
ABC
5.38928 0.37723 0.35256

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.416 0.000
O2 -0.953 -0.545 0.000
O3 1.179 0.247 0.000
H4 -1.813 -0.108 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.35361.19131.8869
O21.35362.27410.9651
O31.19132.27413.0128
H41.88690.96513.0128

picture of Hydrocarboxyl radical state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 H4 107.754 O2 C1 O3 126.543
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability