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 HCOO (formate neutral radical)

using model chemistry: HF/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at HF/CEP-121G
 hartrees
Energy at 0K-37.330349
Energy at 298.15K-37.331623
HF Energy-37.330349
Nuclear repulsion energy33.188335
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 HF/CEP-121G
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' 3260 2974 23.11      
2 A' 1819 1660 353.23      
3 A' 1470 1342 5.51      
4 A' 1106 1010 151.66      
5 A' 614 561 56.39      
6 A" 1092 996 0.21      

Unscaled Zero Point Vibrational Energy (zpe) 4680.8 cm-1
Scaled (by 0.9125) Zero Point Vibrational Energy (zpe) 4271.2 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 HF/CEP-121G
ABC
3.05888 0.40613 0.35853

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.383 0.000
H2 -0.304 1.425 0.000
O3 1.138 -0.028 0.000
O4 -1.100 -0.437 0.000

Atom - Atom Distances (Å)
  C1 H2 O3 O4
C11.08541.21011.3724
H21.08542.04682.0254
O31.21012.04682.2760
O41.37242.02542.2760

picture of formate neutral radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 O3 126.079 H2 C1 O4 110.445
O3 C1 O4 123.477
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.179      
2 H 0.164      
3 O -0.252      
4 O -0.091      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.769 2.291 0.000 2.895
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.708 -1.322 0.000
y -1.322 -14.740 0.000
z 0.000 0.000 -16.232
Traceless
 xyz
x -6.223 -1.322 0.000
y -1.322 4.230 0.000
z 0.000 0.000 1.993
Polar
3z2-r23.986
x2-y2-6.968
xy-1.322
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.173 -0.187 0.000
y -0.187 2.004 0.000
z 0.000 0.000 1.212


<r2> (average value of r2) Å2
<r2> 29.869
(<r2>)1/2 5.465