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All results from a given calculation for HOCO (Hydrocarboxyl radical)

using model chemistry: QCISD/3-21G*

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/3-21G*
 hartrees
Energy at 0K-187.395009
Energy at 298.15K-187.396008
HF Energy-187.062566
Nuclear repulsion energy61.182672
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/3-21G*
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' 3346 3216 1.91      
2 A' 1714 1647 149.94      
3 A' 1328 1277 7.12      
4 A' 957 920 176.48      
5 A' 574 552 42.67      
6 A" 520 499 159.47      

Unscaled Zero Point Vibrational Energy (zpe) 4219.0 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 4054.9 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/3-21G*
ABC
4.47391 0.36691 0.33910

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.457 0.000
O2 -1.091 -0.382 0.000
O3 1.192 0.208 0.000
H4 -0.810 -1.346 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.37611.21741.9764
O21.37612.35761.0037
O31.21742.35762.5344
H41.97641.00372.5344

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 111.336 O2 C1 O3 130.652
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS trans)

Jump to S1C1
Energy calculated at QCISD/3-21G*
 hartrees
Energy at 0K-187.396734
Energy at 298.15K-187.397686
HF Energy-187.062579
Nuclear repulsion energy60.872281
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/3-21G*
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' 3532 3394 47.18      
2 A' 1779 1710 83.47      
3 A' 1214 1166 185.79      
4 A' 956 919 108.10      
5 A' 590 567 12.02      
6 A" 456 438 126.67      

Unscaled Zero Point Vibrational Energy (zpe) 4263.1 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 4097.3 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 QCISD/3-21G*
ABC
5.21352 0.35654 0.33372

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.427 0.000
O2 -0.968 -0.585 0.000
O3 1.201 0.286 0.000
H4 -1.866 -0.165 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 H4
C11.40071.20971.9580
O21.40072.33790.9918
O31.20972.33793.1007
H41.95800.99183.1007

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 108.639 O2 C1 O3 127.017
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability