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

using model chemistry: MP2/6-31+G**

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 MP2/6-31+G**
 hartrees
Energy at 0K-188.612830
Energy at 298.15K-188.613916
HF Energy-188.137194
Nuclear repulsion energy62.601653
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 MP2/6-31+G**
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' 3705 3485 51.68      
2 A' 1862 1751 344.94      
3 A' 1290 1214 1.15      
4 A' 1093 1028 204.91      
5 A' 597 561 34.72      
6 A" 591 555 135.50      

Unscaled Zero Point Vibrational Energy (zpe) 4568.4 cm-1
Scaled (by 0.9406) Zero Point Vibrational Energy (zpe) 4297.1 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 MP2/6-31+G**
ABC
4.63535 0.38534 0.35577

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.447 0.000
O2 -1.073 -0.354 0.000
O3 1.169 0.179 0.000
H4 -0.767 -1.283 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.33931.19911.8926
O21.33932.30420.9773
O31.19912.30422.4261
H41.89260.97732.4261

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 108.558 O2 C1 O3 130.316
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at MP2/6-31+G**
 hartrees
Energy at 0K-188.615966
Energy at 298.15K-188.617031
HF Energy-188.137284
Nuclear repulsion energy62.378400
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 MP2/6-31+G**
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' 3849 3620 145.05      
2 A' 1891 1779 231.89      
3 A' 1244 1170 265.23      
4 A' 1107 1041 66.39      
5 A' 605 569 5.13      
6 A" 553 520 107.02      

Unscaled Zero Point Vibrational Energy (zpe) 4623.8 cm-1
Scaled (by 0.9406) Zero Point Vibrational Energy (zpe) 4349.2 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 MP2/6-31+G**
ABC
5.43163 0.37595 0.35161

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.414 0.000
O2 -0.955 -0.542 0.000
O3 1.182 0.245 0.000
H4 -1.818 -0.101 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.35131.19451.8899
O21.35132.27800.9692
O31.19452.27803.0207
H41.88990.96923.0207

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 107.927 O2 C1 O3 126.854
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability