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 NH4Cl (Ammonium chloride)

using model chemistry: PBEPBE/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at PBEPBE/3-21G
 hartrees
Energy at 0K-514.579688
Energy at 298.15K 
HF Energy-514.579688
Nuclear repulsion energy50.570368
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 PBEPBE/3-21G
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 3301 3271 7.61      
2 A1 1303 1291 3197.40      
3 A1 1213 1202 3.32      
4 A1 421 418 9.48      
5 E 3442 3411 40.17      
5 E 3442 3411 40.17      
6 E 1682 1667 26.83      
6 E 1682 1667 26.83      
7 E 1362 1350 103.04      
7 E 1362 1350 103.04      
8 E 340 337 7.88      
8 E 340 337 7.88      

Unscaled Zero Point Vibrational Energy (zpe) 9944.6 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 9854.1 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 PBEPBE/3-21G
ABC
5.77291 0.16372 0.16372

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/3-21G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.779
Cl2 0.000 0.000 1.132
H3 0.000 0.983 -2.102
H4 0.851 -0.491 -2.102
H5 -0.851 -0.491 -2.102
H6 0.000 0.000 -0.479

Atom - Atom Distances (Å)
  N1 Cl2 H3 H4 H5 H6
N12.91021.03461.03461.03461.2992
Cl22.91023.37963.37963.37961.6110
H31.03463.37961.70221.70221.8969
H41.03463.37961.70221.70221.8969
H51.03463.37961.70221.70221.8969
H61.29921.61101.89691.89691.8969

picture of Ammonium chloride state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 H6 Cl2 180.000 H3 N1 H4 110.701
H3 N1 H5 110.701 H3 N1 H6 108.211
H4 N1 H5 110.701 H4 N1 H6 108.211
H5 N1 H6 108.211
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.749      
2 Cl -0.552      
3 H 0.351      
4 H 0.351      
5 H 0.351      
6 H 0.246      


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 -8.711 8.711
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.942 0.000 0.000
y 0.000 -19.942 0.000
z 0.000 0.000 -13.935
Traceless
 xyz
x -3.003 0.000 0.000
y 0.000 -3.003 0.000
z 0.000 0.000 6.007
Polar
3z2-r212.013
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 1.550 0.000 0.000
y 0.000 1.550 0.000
z 0.000 0.000 4.353


<r2> (average value of r2) Å2
<r2> 71.498
(<r2>)1/2 8.456