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 NH3 (Ammonia)

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

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at LSDA/6-311G**
 hartrees
Energy at 0K-56.282405
Energy at 298.15K-56.285050
HF Energy-56.282405
Nuclear repulsion energy11.844352
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 LSDA/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 A1 3412 3370 0.09      
2 A1 983 971 188.56      
3 E 3548 3505 1.81      
3 E 3548 3505 1.81      
4 E 1603 1583 24.12      
4 E 1603 1583 24.12      

Unscaled Zero Point Vibrational Energy (zpe) 7348.3 cm-1
Scaled (by 0.9877) Zero Point Vibrational Energy (zpe) 7257.9 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 LSDA/6-311G**
ABC
9.79696 9.79696 6.21253

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 0.115
H2 0.000 0.947 -0.268
H3 0.820 -0.474 -0.268
H4 -0.820 -0.474 -0.268

Atom - Atom Distances (Å)
  N1 H2 H3 H4
N11.02171.02171.0217
H21.02171.64091.6409
H31.02171.64091.6409
H41.02171.64091.6409

picture of Ammonia state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 N1 H3 106.838 H2 N1 H4 106.838
H3 N1 H4 106.838
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.636      
2 H 0.212      
3 H 0.212      
4 H 0.212      


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 -1.756 1.756
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -6.195 0.000 0.000
y 0.000 -6.195 0.000
z 0.000 0.000 -9.028
Traceless
 xyz
x 1.417 0.000 0.000
y 0.000 1.417 0.000
z 0.000 0.000 -2.833
Polar
3z2-r2-5.666
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 1.553 0.000 0.000
y 0.000 1.553 0.000
z 0.000 0.000 1.229


<r2> (average value of r2) Å2
<r2> 7.459
(<r2>)1/2 2.731