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

using model chemistry: MP2/6-311G*

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 MP2/6-311G*
 hartrees
Energy at 0K-188.676125
Energy at 298.15K-188.677248
HF Energy-188.174282
Nuclear repulsion energy63.082952
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 MP2/6-311G*
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' 3673 3490 26.30      
2 A' 1891 1797 295.92      
3 A' 1324 1258 2.29      
4 A' 1121 1065 190.53      
5 A' 612 582 36.49      
6 A" 629 597 141.56      

Unscaled Zero Point Vibrational Energy (zpe) 4624.3 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 4394.4 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 MP2/6-311G*
ABC
4.71525 0.39114 0.36118

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.468 0.000
O2 -1.069 -0.350 0.000
O3 1.158 0.155 0.000
H4 -0.713 -1.253 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.34631.20011.8635
O21.34632.28410.9717
O31.20012.28412.3419
H41.86350.97172.3419

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 105.879 O2 C1 O3 127.447
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at MP2/6-311G*
 hartrees
Energy at 0K-188.678550
Energy at 298.15K-188.679641
HF Energy-188.173979
Nuclear repulsion energy62.811340
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 MP2/6-311G*
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' 3840 3649 111.99      
2 A' 1917 1822 183.77      
3 A' 1282 1218 285.93      
4 A' 1117 1061 54.78      
5 A' 622 591 5.31      
6 A" 572 544 116.73      

Unscaled Zero Point Vibrational Energy (zpe) 4674.7 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 4442.4 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 MP2/6-311G*
ABC
5.56103 0.38039 0.35604

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.406 0.000
O2 -0.945 -0.534 0.000
O3 1.170 0.242 0.000
H4 -1.805 -0.105 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.33231.18151.8758
O21.33232.25260.9612
O31.18152.25262.9953
H41.87580.96122.9953

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 108.663 O2 C1 O3 127.197
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability