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/STO-3G

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/STO-3G
 hartrees
Energy at 0K-511.326166
Energy at 298.15K 
HF Energy-511.326166
Nuclear repulsion energy50.776013
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/STO-3G
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 3443 3146 0.32      
2 A1 2323 2122 2866.50      
3 A1 1281 1171 3.31      
4 A1 448 409 13.44      
5 E 3698 3378 4.42      
5 E 3698 3378 4.42      
6 E 1795 1640 9.20      
6 E 1795 1640 9.20      
7 E 1267 1157 96.73      
7 E 1267 1157 96.73      
8 E 369 337 22.58      
8 E 369 337 22.58      

Unscaled Zero Point Vibrational Energy (zpe) 10876.3 cm-1
Scaled (by 0.9136) Zero Point Vibrational Energy (zpe) 9936.6 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/STO-3G
ABC
5.82983 0.16628 0.16628

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.750
Cl2 0.000 0.000 1.122
H3 0.000 0.978 -2.157
H4 0.847 -0.489 -2.157
H5 -0.847 -0.489 -2.157
H6 0.000 0.000 -0.347

Atom - Atom Distances (Å)
  N1 Cl2 H3 H4 H5 H6
N12.87201.05931.05931.05931.4031
Cl22.87203.42203.42203.42201.4689
H31.05933.42201.69391.69392.0576
H41.05933.42201.69391.69392.0576
H51.05933.42201.69391.69392.0576
H61.40311.46892.05762.05762.0576

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 106.162
H3 N1 H5 106.162 H3 N1 H6 112.607
H4 N1 H5 106.162 H4 N1 H6 112.607
H5 N1 H6 112.607
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.394      
2 Cl -0.465      
3 H 0.225      
4 H 0.225      
5 H 0.225      
6 H 0.184      


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 -7.455 7.455
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.993 0.000 0.000
y 0.000 -17.993 0.000
z 0.000 0.000 -11.666
Traceless
 xyz
x -3.163 0.000 0.000
y 0.000 -3.163 0.000
z 0.000 0.000 6.326
Polar
3z2-r212.652
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 0.831 0.000 0.000
y 0.000 0.831 0.000
z 0.000 0.000 2.535


<r2> (average value of r2) Å2
<r2> 69.710
(<r2>)1/2 8.349