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: QCISD/6-311G*

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 QCISD/6-311G*
 hartrees
Energy at 0K-188.685888
Energy at 298.15K-188.687001
HF Energy-188.174490
Nuclear repulsion energy63.140700
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 QCISD/6-311G*
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' 3669 3513 13.17      
2 A' 1882 1802 295.01      
3 A' 1341 1284 3.82      
4 A' 1114 1066 188.05      
5 A' 612 586 39.22      
6 A" 611 585 141.65      

Unscaled Zero Point Vibrational Energy (zpe) 4614.3 cm-1
Scaled (by 0.9574) Zero Point Vibrational Energy (zpe) 4417.7 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 QCISD/6-311G*
ABC
4.66302 0.39283 0.36231

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.447 0.000
O2 -1.062 -0.357 0.000
O3 1.156 0.181 0.000
H4 -0.755 -1.279 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.33151.18601.8833
O21.33152.28180.9714
O31.18602.28182.4046
H41.88330.97142.4046

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 108.716 O2 C1 O3 129.938
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at QCISD/6-311G*
 hartrees
Energy at 0K-188.687833
Energy at 298.15K-188.688911
HF Energy-188.174363
Nuclear repulsion energy62.866771
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 QCISD/6-311G*
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' 3846 3682 83.68      
2 A' 1925 1843 199.87      
3 A' 1299 1244 278.42      
4 A' 1097 1050 62.94      
5 A' 627 600 6.06      
6 A" 549 526 112.16      

Unscaled Zero Point Vibrational Energy (zpe) 4671.5 cm-1
Scaled (by 0.9574) Zero Point Vibrational Energy (zpe) 4472.5 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 QCISD/6-311G*
ABC
5.55649 0.38107 0.35661

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.411 0.000
O2 -0.944 -0.549 0.000
O3 1.170 0.257 0.000
H4 -1.807 -0.126 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.34601.17991.8855
O21.34602.26200.9616
O31.17992.26203.0018
H41.88550.96163.0018

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 108.430 O2 C1 O3 127.018
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability