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: PBEPBE/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 PBEPBE/6-31G(2df,p)
 hartrees
Energy at 0K-114.289313
Energy at 298.15K-114.290718
HF Energy-114.289313
Nuclear repulsion energy30.417296
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 PBEPBE/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' 3563 3526 35.35      
2 A' 2703 2675 155.97      
3 A' 1482 1467 17.52      
4 A' 1293 1280 35.17      
5 A' 1169 1157 119.83      
6 A" 1084 1073 96.85      

Unscaled Zero Point Vibrational Energy (zpe) 5647.0 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 5588.8 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 PBEPBE/6-31G(2df,p)
ABC
9.18056 1.20308 1.06369

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.011 0.750 0.000
O2 0.011 -0.574 0.000
H3 -1.106 0.960 0.000
H4 0.947 -0.866 0.000

Atom - Atom Distances (Å)
  C1 O2 H3 H4
C11.32431.13721.8668
O21.32431.89840.9797
H31.13721.89842.7475
H41.86680.97972.7475

picture of hydroxycarbene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 H4 107.292 O2 C1 H3 100.654
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.240      
2 O -0.195      
3 H 0.111      
4 H 0.324      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.372 -1.753 0.000 1.792
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -10.828 -3.234 0.000
y -3.234 -13.478 0.000
z 0.000 0.000 -11.769
Traceless
 xyz
x 1.795 -3.234 0.000
y -3.234 -2.179 0.000
z 0.000 0.000 0.384
Polar
3z2-r20.769
x2-y22.649
xy-3.234
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.658 -0.595 0.000
y -0.595 2.608 0.000
z 0.000 0.000 1.618


<r2> (average value of r2) Å2
<r2> 17.317
(<r2>)1/2 4.161

Conformer 2 (CS cis)

Jump to S1C1
Energy calculated at PBEPBE/6-31G(2df,p)
 hartrees
Energy at 0K-114.283073
Energy at 298.15K-114.284465
HF Energy-114.283073
Nuclear repulsion energy30.407468
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 PBEPBE/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' 3319 3285 56.59      
2 A' 2633 2606 221.03      
3 A' 1438 1424 45.32      
4 A' 1317 1304 28.51      
5 A' 1151 1139 19.34      
6 A" 1013 1002 28.60      

Unscaled Zero Point Vibrational Energy (zpe) 5436.0 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 5380.0 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 PBEPBE/6-31G(2df,p)
ABC
9.07978 1.20174 1.06128

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.124 0.746 0.000
O2 0.124 -0.568 0.000
H3 -0.968 1.075 0.000
H4 -0.764 -1.007 0.000

Atom - Atom Distances (Å)
  C1 O2 H3 H4
C11.31381.14041.9646
O21.31381.97260.9903
H31.14041.97262.0916
H41.96460.99032.0916

picture of hydroxycarbene state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 H4 116.299 O2 C1 H3 106.769
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.198      
2 O -0.189      
3 H 0.087      
4 H 0.300      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.618 -1.776 0.000 3.164
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -12.029 -0.026 0.000
y -0.026 -12.881 0.000
z 0.000 0.000 -11.751
Traceless
 xyz
x 0.287 -0.026 0.000
y -0.026 -0.991 0.000
z 0.000 0.000 0.704
Polar
3z2-r21.408
x2-y20.851
xy-0.026
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.517 0.012 0.000
y 0.012 3.184 0.000
z 0.000 0.000 1.629


<r2> (average value of r2) Å2
<r2> 17.455
(<r2>)1/2 4.178