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 NH3 (Ammonia)

using model chemistry: B2PLYP/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at B2PLYP/6-31G(2df,p)
 hartrees
Energy at 0K-56.504809
Energy at 298.15K-56.507478
HF Energy-56.435408
Nuclear repulsion energy11.937064
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 B2PLYP/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 A1 3500 3342 0.22 103.00 0.06 0.11
2 A1 1119 1069 134.13 6.50 0.16 0.27
3 E 3626 3462 0.67 44.13 0.75 0.86
3 E 3626 3462 0.67 44.13 0.75 0.86
4 E 1700 1624 14.57 7.35 0.75 0.86
4 E 1700 1624 14.57 7.35 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7635.0 cm-1
Scaled (by 0.955) Zero Point Vibrational Energy (zpe) 7291.4 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 B2PLYP/6-31G(2df,p)
ABC
9.84772 9.84772 6.41448

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G(2df,p)

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 0.120
H2 0.000 0.932 -0.280
H3 0.807 -0.466 -0.280
H4 -0.807 -0.466 -0.280

Atom - Atom Distances (Å)
  N1 H2 H3 H4
N11.01451.01451.0145
H21.01451.61481.6148
H31.01451.61481.6148
H41.01451.61481.6148

picture of Ammonia state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 N1 H3 105.476 H2 N1 H4 105.476
H3 N1 H4 105.476
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.742      
2 H 0.247      
3 H 0.247      
4 H 0.247      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -1.652 1.652
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -6.167 0.000 0.000
y 0.000 -6.167 0.000
z 0.000 0.000 -8.667
Traceless
 xyz
x 1.250 0.000 0.000
y 0.000 1.250 0.000
z 0.000 0.000 -2.500
Polar
3z2-r2-5.001
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.523 0.000 0.000
y 0.000 1.523 0.000
z 0.000 0.000 1.102


<r2> (average value of r2) Å2
<r2> 7.315
(<r2>)1/2 2.705