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 COH (Hydroxymethylidyne)

using model chemistry: HSEh1PBE/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at HSEh1PBE/6-311G**
 hartrees
Energy at 0K-113.697804
Energy at 298.15K-113.697650
HF Energy-113.697804
Nuclear repulsion energy26.014815
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 HSEh1PBE/6-311G**
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' 3378 3244 42.72 531.28 0.33 0.49
2 A' 1423 1367 52.51 13.35 0.54 0.70
3 A' 1141 1095 85.35 42.90 0.46 0.63

Unscaled Zero Point Vibrational Energy (zpe) 2970.9 cm-1
Scaled (by 0.9604) Zero Point Vibrational Energy (zpe) 2853.3 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 HSEh1PBE/6-311G**
ABC
23.30799 1.41032 1.32986

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.060 0.788 0.000
O2 0.060 -0.481 0.000
H3 -0.838 -0.879 0.000

Atom - Atom Distances (Å)
  C1 O2 H3
C11.26831.8931
O21.26830.9821
H31.89310.9821

picture of Hydroxymethylidyne state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.089      
2 O -0.176      
3 H 0.265      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.684 -2.220 0.000 2.786
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -10.953 1.579 0.000
y 1.579 -13.267 0.000
z 0.000 0.000 -11.130
Traceless
 xyz
x 1.245 1.579 0.000
y 1.579 -2.226 0.000
z 0.000 0.000 0.980
Polar
3z2-r21.961
x2-y22.314
xy1.579
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.929 0.423 0.000
y 0.423 2.690 0.000
z 0.000 0.000 1.508


<r2> (average value of r2) Å2
<r2> 14.455
(<r2>)1/2 3.802