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: PBEPBEultrafine/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at PBEPBEultrafine/aug-cc-pVTZ
 hartrees
Energy at 0K-56.511368
Energy at 298.15K-56.514020
HF Energy-56.511368
Nuclear repulsion energy11.845718
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 PBEPBEultrafine/aug-cc-pVTZ
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 3385 3347 7.09 175.35 0.02 0.04
2 A1 1018 1006 121.78 1.95 0.40 0.57
3 E 3507 3468 2.67 40.66 0.75 0.86
3 E 3507 3468 2.67 40.64 0.75 0.86
4 E 1617 1599 14.29 1.00 0.75 0.86
4 E 1617 1599 14.29 1.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7325.0 cm-1
Scaled (by 0.9888) Zero Point Vibrational Energy (zpe) 7242.9 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 PBEPBEultrafine/aug-cc-pVTZ
ABC
9.75756 9.75756 6.25547

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/aug-cc-pVTZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 0.117
H2 0.000 0.944 -0.274
H3 0.818 -0.472 -0.274
H4 -0.818 -0.472 -0.274

Atom - Atom Distances (Å)
  N1 H2 H3 H4
N11.02191.02191.0219
H21.02191.63521.6352
H31.02191.63521.6352
H41.02191.63521.6352

picture of Ammonia state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 N1 H3 106.281 H2 N1 H4 106.281
H3 N1 H4 106.281
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.396      
2 H 0.132      
3 H 0.132      
4 H 0.132      


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 -1.486 1.486
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -6.479 0.000 0.000
y 0.000 -6.479 0.000
z 0.000 0.000 -9.575
Traceless
 xyz
x 1.548 0.000 0.000
y 0.000 1.548 0.000
z 0.000 0.000 -3.095
Polar
3z2-r2-6.191
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 2.163 0.000 0.000
y 0.000 2.163 0.000
z 0.000 0.000 2.514


<r2> (average value of r2) Å2
<r2> 7.686
(<r2>)1/2 2.772