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-pVTZ

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-pVTZ
 hartrees
Energy at 0K-188.820973
Energy at 298.15K-188.822067
HF Energy-188.208713
Nuclear repulsion energy63.285000
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-pVTZ
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' 3701 3537 38.75      
2 A' 1899 1815 338.22      
3 A' 1327 1268 0.10      
4 A' 1102 1053 196.21      
5 A' 613 586 33.69      
6 A" 573 548 110.75      

Unscaled Zero Point Vibrational Energy (zpe) 4607.1 cm-1
Scaled (by 0.9558) Zero Point Vibrational Energy (zpe) 4403.4 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 CCSD/aug-cc-pVTZ
ABC
4.77169 0.39311 0.36319

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.441 0.000
O2 -1.060 -0.360 0.000
O3 1.154 0.189 0.000
H4 -0.748 -1.279 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.32871.18101.8758
O21.32872.28110.9710
O31.18102.28112.4026
H41.87580.97102.4026

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 108.303 O2 C1 O3 130.611
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at CCSD/aug-cc-pVTZ
 hartrees
Energy at 0K-188.823685
Energy at 298.15K-188.824757
HF Energy-188.209627
Nuclear repulsion energy63.061082
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-pVTZ
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' 3857 3686 128.78      
2 A' 1941 1855 252.26      
3 A' 1275 1219 250.33      
4 A' 1104 1055 74.69      
5 A' 628 600 5.01      
6 A" 531 508 84.57      

Unscaled Zero Point Vibrational Energy (zpe) 4667.5 cm-1
Scaled (by 0.9558) Zero Point Vibrational Energy (zpe) 4461.2 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-pVTZ
ABC
5.64044 0.38292 0.35858

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.406 0.000
O2 -0.941 -0.549 0.000
O3 1.166 0.259 0.000
H4 -1.802 -0.119 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.34101.17561.8765
O21.34102.25700.9622
O31.17562.25702.9918
H41.87650.96222.9918

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 107.995 O2 C1 O3 127.374
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability