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

using model chemistry: B3LYP_cp_opt/6-311+G(3df,2pd)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no    
Energy calculated at B3LYP_cp_opt/6-311+G(3df,2pd)
 hartrees
Energy at 0K-56.587555
Energy at 298.15K-56.592643
HF Energy-56.587555
Nuclear repulsion energy11.938609
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 B3LYP_cp_opt/6-311+G(3df,2pd)
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' 3593 3485 8.23      
2 A' 3555 3449 60.22      
3 A' 3475 3370 2.37      
4 A' 3433 3330 90.62      
5 A' 1667 1617 15.31      
6 A' 1658 1608 16.86      
7 A' 1058 1026 105.76      
8 A' 1048 1017 190.66      
9 A' 369 358 47.46      
10 A' 126 122 24.31      
11 A' 91 88 58.90      
12 A" 3595 3487 6.91      
13 A" 3591 3483 1.86      
14 A" 1688 1637 10.87      
15 A" 1664 1614 19.60      
16 A" 246 239 40.12      
17 A" 116 113 37.05      
18 A" 22 21 13.81      

Unscaled Zero Point Vibrational Energy (zpe) 15497.0 cm-1
Scaled (by 0.97) Zero Point Vibrational Energy (zpe) 15032.1 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 B3LYP_cp_opt/6-311+G(3df,2pd)
ABC
3.95985 0.16822 0.16639

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP_cp_opt/6-311+G(3df,2pd)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.155 0.723 0.000
N2 -0.033 1.723 0.000
N3 -0.033 -1.600 0.000
H4 0.420 2.121 0.814
H5 0.420 2.121 -0.814
H6 -1.046 -1.573 0.000
H7 0.255 -2.126 -0.816
H8 0.255 -2.126 0.816

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.01782.32981.63951.63952.59072.96532.9653
N21.01783.32261.01321.01323.44813.94543.9454
N32.32983.32263.83523.83521.01361.01321.0132
H41.63951.01323.83521.62874.05654.55224.2502
H51.63951.01323.83521.62874.05654.25024.5522
H62.59073.44811.01364.05654.05651.63291.6329
H72.96533.94541.01324.55224.25021.63291.6323
H82.96533.94541.01324.25024.55221.63291.6323

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 107.653 H1 N2 H5 107.653
H1 H3 N6 93.112 H1 H3 H7 119.685
H1 H3 H8 119.685 N2 H1 H3 164.748
H4 N2 H5 106.976 N6 H3 H7 107.343
N6 H3 H8 107.343 H7 H3 H8 107.315
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP_cp_opt/6-311+G(3df,2pd) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.000      
2 N 0.000      
3 N -0.358      
4 H 0.000      
5 H 0.000      
6 H 0.120      
7 H 0.119      
8 H 0.119      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.887 -2.174 0.000 2.348
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -6.775 -0.020 -0.000
y -0.020 -4.285 0.001
z -0.000 0.001 -6.379
Traceless
 xyz
x -1.443 -0.020 -0.000
y -0.020 2.292 0.001
z -0.000 0.001 -0.849
Polar
3z2-r2-1.698
x2-y2-2.490
xy-0.020
xz-0.000
yz0.001


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


<r2> (average value of r2) Å2
<r2> 72.539
(<r2>)1/2 8.517