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 HOCH (hydroxycarbene)

using model chemistry: MP2=FULL/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS trans 1A'
1 2 no CS cis 1A'

Conformer 1 (CS trans)

Jump to S1C2
Energy calculated at MP2=FULL/STO-3G
 hartrees
Energy at 0K-112.369653
Energy at 298.15K-112.371064
HF Energy-112.276516
Nuclear repulsion energy29.824896
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 MP2=FULL/STO-3G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3828 3403 11.83      
2 A' 3136 2787 90.16      
3 A' 1689 1502 28.29      
4 A' 1495 1328 24.37      
5 A' 1334 1186 71.27      
6 A" 1191 1058 49.20      

Unscaled Zero Point Vibrational Energy (zpe) 6336.0 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 5632.1 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 MP2=FULL/STO-3G
ABC
8.56167 1.16874 1.02836

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.010 0.765 0.000
O2 0.010 -0.584 0.000
H3 -1.128 0.940 0.000
H4 0.991 -0.859 0.000

Atom - Atom Distances (Å)
  C1 O2 H3 H4
C11.34931.15111.8977
O21.34931.90201.0194
H31.15111.90202.7800
H41.89771.01942.7800

picture of hydroxycarbene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 H4 105.634 O2 C1 H3 98.742
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS cis)

Jump to S1C1
Energy calculated at MP2=FULL/STO-3G
 hartrees
Energy at 0K-112.360305
Energy at 298.15K-112.361704
HF Energy-112.267497
Nuclear repulsion energy29.834408
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 MP2=FULL/STO-3G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3716 3303 22.86      
2 A' 3082 2740 109.13      
3 A' 1661 1477 24.30      
4 A' 1497 1331 31.32      
5 A' 1351 1201 35.61      
6 A" 1103 980 24.05      

Unscaled Zero Point Vibrational Energy (zpe) 6204.7 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 5515.4 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 MP2=FULL/STO-3G
ABC
8.45361 1.16845 1.02656

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.128 0.760 0.000
O2 0.128 -0.580 0.000
H3 -0.985 1.061 0.000
H4 -0.813 -0.985 0.000

Atom - Atom Distances (Å)
  C1 O2 H3 H4
C11.33991.15301.9828
O21.33991.98261.0251
H31.15301.98262.0528
H41.98281.02512.0528

picture of hydroxycarbene state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 H4 113.271 O2 C1 H3 105.115
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability