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: HSEh1PBE/3-21G*

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/3-21G*
 hartrees
Energy at 0K-187.837805
Energy at 298.15K-187.838818
HF Energy-187.837805
Nuclear repulsion energy61.489797
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/3-21G*
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' 2783 2672 29.87      
2 A' 1741 1672 161.96      
3 A' 1289 1237 0.77      
4 A' 914 877 3.05      
5 A' 376 361 25.21      
6 A" 965 926 0.11      

Unscaled Zero Point Vibrational Energy (zpe) 4034.1 cm-1
Scaled (by 0.9599) Zero Point Vibrational Energy (zpe) 3872.3 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/3-21G*
ABC
3.81055 0.38547 0.35006

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.313 0.000
H2 -0.400 1.360 0.000
O3 1.175 0.006 0.000
O4 -1.125 -0.411 0.000

Atom - Atom Distances (Å)
  C1 H2 O3 O4
C11.12091.21421.3373
H21.12092.07711.9130
O31.21422.07712.3367
O41.33731.91302.3367

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 125.582 H2 C1 O4 101.835
O3 C1 O4 132.583
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.434      
2 H 0.251      
3 O -0.429      
4 O -0.256      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.260 1.408 0.000 1.890
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.159 -1.010 0.000
y -1.010 -14.372 0.000
z 0.000 0.000 -15.768
Traceless
 xyz
x -5.089 -1.010 0.000
y -1.010 3.591 0.000
z 0.000 0.000 1.498
Polar
3z2-r22.996
x2-y2-5.786
xy-1.010
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.148 0.211 0.000
y 0.211 2.073 0.000
z 0.000 0.000 0.861


<r2> (average value of r2) Å2
<r2> 35.576
(<r2>)1/2 5.965