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: HF/CEP-31G*

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 HF/CEP-31G*
 hartrees
Energy at 0K-37.416784
Energy at 298.15K-37.417931
HF Energy-37.416784
Nuclear repulsion energy34.543268
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 HF/CEP-31G*
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' 4020 3610 89.98      
2 A' 2059 1849 547.83      
3 A' 1410 1266 1.07      
4 A' 1227 1101 265.21      
5 A' 655 589 53.21      
6 A" 612 549 179.40      

Unscaled Zero Point Vibrational Energy (zpe) 4991.0 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 4482.0 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 HF/CEP-31G*
ABC
4.78045 0.39701 0.36657

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.441 0.000
O2 -1.055 -0.355 0.000
O3 1.150 0.183 0.000
H4 -0.759 -1.268 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.32191.17841.8709
O21.32192.26930.9596
O31.17842.26932.3982
H41.87090.95962.3982

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 109.143 O2 C1 O3 130.257
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.105      
2 O -0.394      
3 O -0.165      
4 H 0.453      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.289 -1.636 0.000 2.083
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.183 0.581 0.000
y 0.581 -13.327 0.000
z 0.000 0.000 -16.085
Traceless
 xyz
x -6.477 0.581 0.000
y 0.581 5.307 0.000
z 0.000 0.000 1.170
Polar
3z2-r22.340
x2-y2-7.856
xy0.581
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.900 0.018 0.000
y 0.018 2.312 0.000
z 0.000 0.000 1.534


<r2> (average value of r2) Å2
<r2> 29.064
(<r2>)1/2 5.391

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at HF/CEP-31G*
 hartrees
Energy at 0K-37.417497
Energy at 298.15K-37.418596
HF Energy-37.417497
Nuclear repulsion energy34.327761
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 HF/CEP-31G*
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' 4142 3720 154.87      
2 A' 2105 1890 411.59      
3 A' 1386 1245 377.13      
4 A' 1181 1061 52.13      
5 A' 671 603 7.02      
6 A" 533 479 110.78      

Unscaled Zero Point Vibrational Energy (zpe) 5009.2 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 4498.3 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 HF/CEP-31G*
ABC
5.87949 0.38333 0.35986

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.399 0.000
O2 -0.940 -0.547 0.000
O3 1.165 0.265 0.000
H4 -1.800 -0.137 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.33321.17221.8779
O21.33322.25540.9528
O31.17222.25542.9915
H41.87790.95282.9915

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 109.336 O2 C1 O3 128.260
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.048      
2 O -0.385      
3 O -0.123      
4 H 0.460      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -3.532 0.706 0.000 3.602
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.142 -1.410 0.000
y -1.410 -17.949 0.000
z 0.000 0.000 -16.146
Traceless
 xyz
x 2.905 -1.410 0.000
y -1.410 -2.805 0.000
z 0.000 0.000 -0.100
Polar
3z2-r2-0.200
x2-y23.807
xy-1.410
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.388 0.029 0.000
y 0.029 2.028 0.000
z 0.000 0.000 1.559


<r2> (average value of r2) Å2
<r2> 29.588
(<r2>)1/2 5.440