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: mPW1PW91/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at mPW1PW91/6-31G
 hartrees
Energy at 0K-517.332838
Energy at 298.15K 
HF Energy-517.332838
Nuclear repulsion energy51.453535
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 mPW1PW91/6-31G
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 3504 3317 17.52      
2 A1 1314 1243 229.23      
3 A1 1042 986 3889.65      
4 A1 450 426 4.54      
5 E 3668 3472 57.30      
5 E 3668 3472 57.30      
6 E 1728 1636 48.15      
6 E 1728 1636 48.15      
7 E 1451 1373 101.97      
7 E 1451 1373 101.97      
8 E 389 368 8.23      
8 E 389 368 8.23      

Unscaled Zero Point Vibrational Energy (zpe) 10390.2 cm-1
Scaled (by 0.9466) Zero Point Vibrational Energy (zpe) 9835.4 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 mPW1PW91/6-31G
ABC
5.96530 0.16944 0.16944

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.749
Cl2 0.000 0.000 1.112
H3 0.000 0.967 -2.060
H4 0.837 -0.483 -2.060
H5 -0.837 -0.483 -2.060
H6 0.000 0.000 -0.484

Atom - Atom Distances (Å)
  N1 Cl2 H3 H4 H5 H6
N12.86181.01561.01561.01561.2659
Cl22.86183.31683.31683.31681.5959
H31.01563.31681.67451.67451.8496
H41.01563.31681.67451.67451.8496
H51.01563.31681.67451.67451.8496
H61.26591.59591.84961.84961.8496

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 111.060
H3 N1 H5 111.060 H3 N1 H6 107.831
H4 N1 H5 111.060 H4 N1 H6 107.831
H5 N1 H6 107.831
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.877      
2 Cl -0.501      
3 H 0.385      
4 H 0.385      
5 H 0.385      
6 H 0.223      


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 -8.595 8.595
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.974 0.000 0.000
y 0.000 -19.974 0.000
z 0.000 0.000 -14.716
Traceless
 xyz
x -2.629 0.000 0.000
y 0.000 -2.629 0.000
z 0.000 0.000 5.258
Polar
3z2-r210.515
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 1.693 0.000 0.000
y 0.000 1.693 0.000
z 0.000 0.000 4.507


<r2> (average value of r2) Å2
<r2> 69.611
(<r2>)1/2 8.343