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 NH4 (Ammonium radical)

using model chemistry: PBEPBEultrafine/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes TD 2A1
Energy calculated at PBEPBEultrafine/aug-cc-pVDZ
 hartrees
Energy at 0K-57.004400
Energy at 298.15K 
HF Energy-57.004400
Nuclear repulsion energy15.855468
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-pVDZ
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 2857 2839 0.00 100138.30 0.00 0.00
2 E 1480 1471 0.00 5121.14 0.75 0.86
2 E 1480 1471 0.00 5121.14 0.75 0.86
3 T2 2793 2776 1023.02 9108.36 0.75 0.86
3 T2 2793 2776 1023.02 9108.36 0.75 0.86
3 T2 2793 2776 1023.02 9108.36 0.75 0.86
4 T2 1182 1175 67.46 3187.81 0.75 0.86
4 T2 1182 1175 67.46 3187.81 0.75 0.86
4 T2 1182 1175 67.46 3187.81 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8870.8 cm-1
Scaled (by 0.9939) Zero Point Vibrational Energy (zpe) 8816.7 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-pVDZ
ABC
5.61289 5.61289 5.61289

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

Point Group is Td

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 0.000
H2 0.610 0.610 0.610
H3 -0.610 -0.610 0.610
H4 -0.610 0.610 -0.610
H5 0.610 -0.610 -0.610

Atom - Atom Distances (Å)
  N1 H2 H3 H4 H5
N11.05711.05711.05711.0571
H21.05711.72631.72631.7263
H31.05711.72631.72631.7263
H41.05711.72631.72631.7263
H51.05711.72631.72631.7263

picture of Ammonium radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 N1 H3 109.471 H2 N1 H4 109.471
H2 N1 H5 109.471 H3 N1 H4 109.471
H3 N1 H5 109.471 H4 N1 H5 109.471
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N 0.477      
2 H -0.119      
3 H -0.119      
4 H -0.119      
5 H -0.119      


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 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.483 0.000 0.000
y 0.000 -15.483 0.000
z 0.000 0.000 -15.483
Traceless
 xyz
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000
Polar
3z2-r20.000
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 29.571 0.000 0.000
y 0.000 29.571 0.000
z 0.000 0.000 29.571


<r2> (average value of r2) Å2
<r2> 14.141
(<r2>)1/2 3.760