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

using model chemistry: CISD/6-311+G(3df,2p)

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 CISD/6-311+G(3df,2p)
 hartrees
Energy at 0K-188.746589
Energy at 298.15K-188.747721
HF Energy-188.206179
Nuclear repulsion energy63.944187
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 CISD/6-311+G(3df,2p)
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' 3865 3563 62.68      
2 A' 1985 1830 403.37      
3 A' 1354 1248 0.74      
4 A' 1160 1070 211.25      
5 A' 636 587 40.00      
6 A" 603 555 126.05      

Unscaled Zero Point Vibrational Energy (zpe) 4801.8 cm-1
Scaled (by 0.9218) Zero Point Vibrational Energy (zpe) 4426.3 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 CISD/6-311+G(3df,2p)
ABC
4.90608 0.40075 0.37049

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/6-311+G(3df,2p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.435 0.000
O2 -1.048 -0.357 0.000
O3 1.143 0.190 0.000
H4 -0.755 -1.271 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.31351.16881.8659
O21.31352.25820.9606
O31.16882.25822.3954
H41.86590.96062.3954

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 109.288 O2 C1 O3 130.850
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at CISD/6-311+G(3df,2p)
 hartrees
Energy at 0K-188.748926
Energy at 298.15K-188.750034
HF Energy-188.207158
Nuclear repulsion energy63.723009
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 CISD/6-311+G(3df,2p)
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' 4013 3699 157.75      
2 A' 2026 1868 306.45      
3 A' 1311 1208 294.20      
4 A' 1160 1070 50.82      
5 A' 655 604 4.80      
6 A" 552 509 88.87      

Unscaled Zero Point Vibrational Energy (zpe) 4858.7 cm-1
Scaled (by 0.9218) Zero Point Vibrational Energy (zpe) 4478.7 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 CISD/6-311+G(3df,2p)
ABC
5.89801 0.38961 0.36547

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/6-311+G(3df,2p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.398 0.000
O2 -0.932 -0.543 0.000
O3 1.156 0.261 0.000
H4 -1.791 -0.132 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.32411.16361.8673
O21.32412.23680.9524
O31.16362.23682.9723
H41.86730.95242.9723

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 109.130 O2 C1 O3 127.969
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability