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

using model chemistry: B2PLYP=FULL/3-21G

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 B2PLYP=FULL/3-21G
 hartrees
Energy at 0K-187.822732
Energy at 298.15K-187.823766
HF Energy-187.706646
Nuclear repulsion energy61.502904
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 B2PLYP=FULL/3-21G
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' 3307 3148 1.45      
2 A' 1739 1656 183.21      
3 A' 1314 1251 7.16      
4 A' 976 929 150.68      
5 A' 572 544 38.90      
6 A" 561 534 149.46      

Unscaled Zero Point Vibrational Energy (zpe) 4233.9 cm-1
Scaled (by 0.952) Zero Point Vibrational Energy (zpe) 4030.6 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 B2PLYP=FULL/3-21G
ABC
4.57759 0.37032 0.34260

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.449 0.000
O2 -1.086 -0.371 0.000
O3 1.189 0.203 0.000
H4 -0.827 -1.343 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.36081.21431.9740
O21.36082.34611.0059
O31.21432.34612.5406
H41.97401.00592.5406

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 112.170 O2 C1 O3 131.223
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at B2PLYP=FULL/3-21G
 hartrees
Energy at 0K-187.825064
Energy at 298.15K-187.826061
HF Energy-187.708489
Nuclear repulsion energy61.190393
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 B2PLYP=FULL/3-21G
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' 3538 3368 65.39      
2 A' 1790 1705 99.76      
3 A' 1198 1140 188.37      
4 A' 990 942 107.30      
5 A' 591 563 9.63      
6 A" 501 477 125.94      

Unscaled Zero Point Vibrational Energy (zpe) 4304.2 cm-1
Scaled (by 0.952) Zero Point Vibrational Energy (zpe) 4097.6 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 B2PLYP=FULL/3-21G
ABC
5.26870 0.36088 0.33775

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.423 0.000
O2 -0.966 -0.572 0.000
O3 1.198 0.273 0.000
H4 -1.863 -0.149 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.38691.20781.9485
O21.38692.32340.9916
O31.20782.32343.0900
H41.94850.99163.0900

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 108.878 O2 C1 O3 126.994
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability