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All results from a given calculation for NH3NH3 (Ammonia Dimer)

using model chemistry: B1B95/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no    
Energy calculated at B1B95/CEP-31G*
 hartrees
Energy at 0K-23.367003
Energy at 298.15K-23.372597
Nuclear repulsion energy27.880676
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 B1B95/CEP-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 A 3650 3494 0.00      
2 A 3503 3353 0.00      
3 A 1712 1639 0.00      
4 A 1161 1111 0.00      
5 A 548 524 0.00      
6 A 163 156 0.00      
7 A 3661 3505 1.69      
8 A 1718 1645 35.08      
9 A 242 232 144.74      
10 A 84 80 31.77      
11 A 3661 3504 0.00      
12 A 1704 1631 0.00      
13 A 107 102 0.00      
14 A 3644 3488 26.65      
15 A 3502 3353 16.09      
16 A 1683 1611 21.39      
17 A 1107 1060 437.75      
18 A 208 199 308.24      

Unscaled Zero Point Vibrational Energy (zpe) 16029.4 cm-1
Scaled (by 0.9572) Zero Point Vibrational Energy (zpe) 15343.4 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 B1B95/CEP-31G*
ABC
4.55759 0.18327 0.17993

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/CEP-31G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.679 0.823 0.000
N2 0.000 1.588 0.000
N3 0.000 -1.588 0.000
H4 0.197 2.165 0.819
H5 0.197 2.165 -0.819
H6 -0.679 -0.823 0.000
H7 -0.197 -2.165 -0.819
H8 -0.197 -2.165 0.819

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.02292.50481.64421.64422.13353.21943.2194
N21.02293.17631.02081.02082.50483.84633.8463
N32.50483.17633.84633.84631.02291.02081.0208
H41.64421.02083.84631.63783.21944.64594.3476
H51.64421.02083.84631.63783.21944.34764.6459
H62.13352.50481.02293.21943.21941.64421.6442
H73.21943.84631.02084.64594.34761.64421.6378
H83.21943.84631.02084.34764.64591.64421.6378

picture of Ammonia Dimer state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 N2 H4 107.125 H1 N2 H5 107.125
H1 H3 N6 57.299 H1 H3 H7 126.593
H1 H3 H8 126.593 N2 H1 H3 122.701
H4 N2 H5 106.685 N6 H3 H7 107.125
N6 H3 H8 107.125 H7 H3 H8 106.685
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.295      
2 N -0.820      
3 N -0.820      
4 H 0.262      
5 H 0.262      
6 H 0.295      
7 H 0.262      
8 H 0.262      


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 -16.586 4.629 0.000
y 4.629 -8.649 0.000
z 0.000 0.000 -12.087
Traceless
 xyz
x -6.218 4.629 0.000
y 4.629 5.687 0.000
z 0.000 0.000 0.531
Polar
3z2-r21.062
x2-y2-7.937
xy4.629
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.701 -0.222 0.000
y -0.222 3.444 0.000
z 0.000 0.000 2.899


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000