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=FULL/TZVP

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=FULL/TZVP
 hartrees
Energy at 0K-188.766092
Energy at 298.15K-188.767186
HF Energy-188.198623
Nuclear repulsion energy63.300720
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=FULL/TZVP
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' 3706 3512 29.09      
2 A' 1913 1813 335.53      
3 A' 1327 1257 0.61      
4 A' 1103 1045 201.33      
5 A' 621 588 36.96      
6 A" 568 538 130.62      

Unscaled Zero Point Vibrational Energy (zpe) 4619.2 cm-1
Scaled (by 0.9475) Zero Point Vibrational Energy (zpe) 4376.7 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 CCSD=FULL/TZVP
ABC
4.70375 0.39456 0.36402

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.445 0.000
O2 -1.059 -0.360 0.000
O3 1.152 0.186 0.000
H4 -0.739 -1.278 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.33011.18051.8749
O21.33012.27730.9727
O31.18052.27732.3915
H41.87490.97272.3915

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 108.010 O2 C1 O3 130.112
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at CCSD=FULL/TZVP
 hartrees
Energy at 0K-188.769109
Energy at 298.15K-188.770177
HF Energy-188.199406
Nuclear repulsion energy63.031343
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=FULL/TZVP
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' 3869 3666 116.35      
2 A' 1951 1848 242.78      
3 A' 1277 1210 249.74      
4 A' 1098 1041 80.33      
5 A' 632 599 6.16      
6 A" 526 499 99.64      

Unscaled Zero Point Vibrational Energy (zpe) 4677.2 cm-1
Scaled (by 0.9475) Zero Point Vibrational Energy (zpe) 4431.7 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 CCSD=FULL/TZVP
ABC
5.59186 0.38301 0.35846

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.408 0.000
O2 -0.941 -0.551 0.000
O3 1.166 0.259 0.000
H4 -1.800 -0.116 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.34321.17531.8751
O21.34322.25690.9635
O31.17532.25692.9899
H41.87510.96352.9899

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 107.620 O2 C1 O3 127.183
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability