return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: PBEPBE/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 PBEPBE/6-31+G**
 hartrees
Energy at 0K-188.912249
Energy at 298.15K-188.913300
HF Energy-188.912249
Nuclear repulsion energy62.491394
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 PBEPBE/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' 3430 3391 6.52      
2 A' 1814 1793 324.35      
3 A' 1239 1225 0.68      
4 A' 1038 1027 137.33      
5 A' 565 558 29.76      
6 A" 586 579 109.85      

Unscaled Zero Point Vibrational Energy (zpe) 4335.9 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 4286.5 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 PBEPBE/6-31+G**
ABC
4.64201 0.38419 0.35482

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.445 0.000
O2 -1.074 -0.348 0.000
O3 1.172 0.177 0.000
H4 -0.781 -1.296 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.33531.20231.9075
O21.33532.30720.9919
O31.20232.30722.4460
H41.90750.99192.4460

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 109.207 O2 C1 O3 130.716
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.289      
2 O -0.330      
3 O -0.305      
4 H 0.347      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.978 -1.788 0.000 2.038
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.647 0.868 0.000
y 0.868 -14.270 0.000
z 0.000 0.000 -16.695
Traceless
 xyz
x -5.164 0.868 0.000
y 0.868 4.401 0.000
z 0.000 0.000 0.763
Polar
3z2-r21.526
x2-y2-6.377
xy0.868
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.132 0.249 0.000
y 0.249 3.411 0.000
z 0.000 0.000 2.194


<r2> (average value of r2) Å2
<r2> 35.668
(<r2>)1/2 5.972

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at PBEPBE/6-31+G**
 hartrees
Energy at 0K-188.915455
Energy at 298.15K-188.916496
HF Energy-188.915455
Nuclear repulsion energy62.247774
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 PBEPBE/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' 3690 3648 104.22      
2 A' 1846 1824 233.22      
3 A' 1189 1175 239.78      
4 A' 1062 1050 48.20      
5 A' 589 582 5.64      
6 A" 550 544 97.78      

Unscaled Zero Point Vibrational Energy (zpe) 4462.2 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 4411.3 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 PBEPBE/6-31+G**
ABC
5.35057 0.37548 0.35086

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.417 0.000
O2 -0.956 -0.541 0.000
O3 1.184 0.241 0.000
H4 -1.828 -0.097 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.35321.19711.8984
O21.35322.27870.9783
O31.19712.27873.0307
H41.89840.97833.0307

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 107.936 O2 C1 O3 126.517
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.269      
2 O -0.349      
3 O -0.293      
4 H 0.373      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -3.010 0.342 0.000 3.029
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.108 -1.013 0.000
y -1.013 -18.487 0.000
z 0.000 0.000 -16.770
Traceless
 xyz
x 3.521 -1.013 0.000
y -1.013 -3.048 0.000
z 0.000 0.000 -0.473
Polar
3z2-r2-0.946
x2-y24.380
xy-1.013
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.590 0.176 0.000
y 0.176 2.921 0.000
z 0.000 0.000 2.261


<r2> (average value of r2) Å2
<r2> 36.006
(<r2>)1/2 6.000