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/cc-pVQZ

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/cc-pVQZ
 hartrees
Energy at 0K-114.255810
Energy at 298.15K-114.257230
HF Energy-113.844517
Nuclear repulsion energy30.832312
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/cc-pVQZ
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' 3765 3571 108.15      
2 A' 2949 2797 119.51      
3 A' 1518 1440 16.25      
4 A' 1357 1287 74.72      
5 A' 1218 1155 141.91      
6 A" 1123 1065 116.01      

Unscaled Zero Point Vibrational Energy (zpe) 5965.4 cm-1
Scaled (by 0.9484) Zero Point Vibrational Energy (zpe) 5657.6 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/cc-pVQZ
ABC
9.71469 1.22732 1.08965

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVQZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.010 0.739 0.000
O2 0.010 -0.569 0.000
H3 -1.071 0.975 0.000
H4 0.931 -0.859 0.000

Atom - Atom Distances (Å)
  C1 O2 H3 H4
C11.30841.10611.8443
O21.30841.88480.9652
H31.10611.88482.7145
H41.84430.96522.7145

picture of hydroxycarbene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 H4 107.462 O2 C1 H3 102.305
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS cis)

Jump to S1C1
Energy calculated at MP2/cc-pVQZ
 hartrees
Energy at 0K-114.247852
Energy at 298.15K-114.249263
HF Energy-113.836410
Nuclear repulsion energy30.747619
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/cc-pVQZ
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' 3663 3474 27.23      
2 A' 2861 2713 174.11      
3 A' 1489 1412 42.38      
4 A' 1361 1291 76.98      
5 A' 1239 1175 46.48      
6 A" 1050 996 27.08      

Unscaled Zero Point Vibrational Energy (zpe) 5831.3 cm-1
Scaled (by 0.9484) Zero Point Vibrational Energy (zpe) 5530.4 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/cc-pVQZ
ABC
9.37744 1.22292 1.08183

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVQZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.122 0.740 0.000
O2 0.122 -0.567 0.000
H3 -0.944 1.061 0.000
H4 -0.763 -0.964 0.000

Atom - Atom Distances (Å)
  C1 O2 H3 H4
C11.30671.11281.9197
O21.30671.94540.9698
H31.11281.94542.0327
H41.91970.96982.0327

picture of hydroxycarbene state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 H4 114.164 O2 C1 H3 106.766
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability