return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for HOCH (hydroxycarbene)

using model chemistry: CCD/6-31G(2df,p)

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 CCD/6-31G(2df,p)
 hartrees
Energy at 0K-114.175240
Energy at 298.15K-114.176663
HF Energy-113.800442
Nuclear repulsion energy30.793011
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 CCD/6-31G(2df,p)
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' 3826 3624 74.36      
2 A' 2911 2758 126.55      
3 A' 1549 1468 24.31      
4 A' 1385 1312 82.57      
5 A' 1251 1185 132.39      
6 A" 1116 1057 113.53      

Unscaled Zero Point Vibrational Energy (zpe) 6019.0 cm-1
Scaled (by 0.9472) Zero Point Vibrational Energy (zpe) 5701.2 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 CCD/6-31G(2df,p)
ABC
9.61718 1.22565 1.08710

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.011 0.741 0.000
O2 0.011 -0.569 0.000
H3 -1.082 0.970 0.000
H4 0.928 -0.862 0.000

Atom - Atom Distances (Å)
  C1 O2 H3 H4
C11.30951.11681.8466
O21.30951.88780.9629
H31.11681.88782.7200
H41.84660.96292.7200

picture of hydroxycarbene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 H4 107.733 O2 C1 H3 101.872
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS cis)

Jump to S1C1
Energy calculated at CCD/6-31G(2df,p)
 hartrees
Energy at 0K-114.167915
Energy at 298.15K-114.169328
HF Energy-113.792995
Nuclear repulsion energy30.732502
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 CCD/6-31G(2df,p)
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' 3746 3548 22.50      
2 A' 2836 2686 175.34      
3 A' 1520 1440 39.13      
4 A' 1386 1313 102.62      
5 A' 1281 1214 39.65      
6 A" 1037 982 34.98      

Unscaled Zero Point Vibrational Energy (zpe) 5902.9 cm-1
Scaled (by 0.9472) Zero Point Vibrational Energy (zpe) 5591.2 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 CCD/6-31G(2df,p)
ABC
9.32609 1.22218 1.08057

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G(2df,p)

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 -0.953 1.060 0.000
H4 -0.757 -0.968 0.000

Atom - Atom Distances (Å)
  C1 O2 H3 H4
C11.30681.12211.9209
O21.30681.94990.9661
H31.12211.94992.0373
H41.92090.96612.0373

picture of hydroxycarbene state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 H4 114.545 O2 C1 H3 106.553
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability