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: CCSD/aug-cc-pVDZ

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 CCSD/aug-cc-pVDZ
 hartrees
Energy at 0K-188.672893
Energy at 298.15K-188.673972
HF Energy-188.160529
Nuclear repulsion energy62.682601
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 CCSD/aug-cc-pVDZ
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' 3672 3537 33.89      
2 A' 1863 1795 325.45      
3 A' 1321 1273 1.24      
4 A' 1070 1031 194.37      
5 A' 601 579 30.40      
6 A" 567 546 109.97      

Unscaled Zero Point Vibrational Energy (zpe) 4546.5 cm-1
Scaled (by 0.9634) Zero Point Vibrational Energy (zpe) 4380.1 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 CCSD/aug-cc-pVDZ
ABC
4.65688 0.38588 0.35636

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.447 0.000
O2 -1.071 -0.365 0.000
O3 1.164 0.190 0.000
H4 -0.748 -1.287 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.34391.19221.8885
O21.34392.30270.9764
O31.19222.30272.4162
H41.88850.97642.4162

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 107.905 O2 C1 O3 130.357
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at CCSD/aug-cc-pVDZ
 hartrees
Energy at 0K-188.675697
Energy at 298.15K-188.676750
HF Energy-188.161433
Nuclear repulsion energy62.458007
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 CCSD/aug-cc-pVDZ
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' 3826 3686 115.36      
2 A' 1902 1832 239.32      
3 A' 1272 1225 233.81      
4 A' 1066 1027 86.06      
5 A' 611 589 4.99      
6 A" 526 506 84.71      

Unscaled Zero Point Vibrational Energy (zpe) 4601.2 cm-1
Scaled (by 0.9634) Zero Point Vibrational Energy (zpe) 4432.8 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 CCSD/aug-cc-pVDZ
ABC
5.46659 0.37618 0.35196

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.413 0.000
O2 -0.950 -0.555 0.000
O3 1.177 0.259 0.000
H4 -1.814 -0.118 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.35631.18691.8902
O21.35632.27750.9677
O31.18692.27753.0146
H41.89020.96773.0146

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 107.675 O2 C1 O3 127.021
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability