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All results from a given calculation for HNO2 (Nitrous acid)

using model chemistry: BLYP/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at BLYP/6-311G*
 hartrees
Energy at 0K-205.746982
Energy at 298.15K-205.749163
Nuclear repulsion energy67.714928
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 BLYP/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' 3572 3563 22.81      
2 A' 1718 1713 182.19      
3 A' 1224 1221 163.26      
4 A' 746 744 68.07      
5 A' 506 505 121.85      
6 A" 585 583 106.80      

Unscaled Zero Point Vibrational Energy (zpe) 4175.0 cm-1
Scaled (by 0.9975) Zero Point Vibrational Energy (zpe) 4164.5 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 BLYP/6-311G*
ABC
2.95798 0.39110 0.34543

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.789 -0.243 0.000
O2 0.905 -0.668 0.000
N3 0.000 0.544 0.000
O4 -1.129 0.222 0.000

Atom - Atom Distances (Å)
  H1 O2 N3 O4
H10.98111.95482.9554
O20.98111.51322.2209
N31.95481.51321.1741
O42.95542.22091.1741

picture of Nitrous acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 N3 101.051 O2 N3 O4 110.837
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.341      
2 O -0.391      
3 N 0.205      
4 O -0.155      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.288 -1.477 0.000 1.505
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -13.346 0.459 0.000
y 0.459 -18.301 0.000
z 0.000 0.000 -15.935
Traceless
 xyz
x 3.772 0.459 0.000
y 0.459 -3.660 0.000
z 0.000 0.000 -0.112
Polar
3z2-r2-0.223
x2-y24.955
xy0.459
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 35.965
(<r2>)1/2 5.997