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

using model chemistry: B3LYP/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/6-311+G(3df,2pd)
 hartrees
Energy at 0K-113.179172
Energy at 298.15K-113.184284
HF Energy-113.179172
Counterpoise corrected energy-56.587555
CP Energy at 298.15K-56.592643
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy39.485416
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/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' 3592 3464 8.25      
2 A' 3554 3427 59.28      
3 A' 3474 3350 2.45      
4 A' 3431 3308 92.73      
5 A' 1667 1607 15.69      
6 A' 1658 1598 15.42      
7 A' 1058 1020 102.87      
8 A' 1049 1012 185.11      
9 A' 372 359 48.13      
10 A' 129 125 24.77      
11 A' 93 90 56.88      
12 A" 3594 3466 7.12      
13 A" 3591 3462 1.90      
14 A" 1688 1628 10.85      
15 A" 1664 1604 18.93      
16 A" 251 242 40.10      
17 A" 118 113 35.78      
18 A" 23 22 14.40      

Unscaled Zero Point Vibrational Energy (zpe) 15502.9 cm-1
Scaled (by 0.9642) Zero Point Vibrational Energy (zpe) 14947.9 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/6-311+G(3df,2pd)
ABC
3.95834 0.16914 0.16730

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-311+G(3df,2pd)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.154 0.718 0.000
N2 -0.033 1.718 0.000
N3 -0.033 -1.595 0.000
H4 0.421 2.115 0.814
H5 0.421 2.115 -0.814
H6 -1.046 -1.571 0.000
H7 0.256 -2.121 -0.816
H8 0.256 -2.121 0.816

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.01792.31981.63941.63942.58392.95562.9556
N21.01793.31291.01321.01323.44153.93593.9359
N32.31983.31293.82523.82521.01361.01331.0133
H41.63941.01323.82521.62864.04994.54234.2397
H51.63941.01323.82521.62864.04994.23974.5423
H62.58393.44151.01364.04994.04991.63271.6327
H72.95563.93591.01334.54234.23971.63271.6320
H82.95563.93591.01334.23974.54231.63271.6320

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 107.638 H1 N2 H5 107.638
H1 H3 N6 93.263 H1 H3 H7 119.667
H1 H3 H8 119.667 N2 H1 H3 164.808
H4 N2 H5 106.968 N6 H3 H7 107.322
N6 H3 H8 107.322 H7 H3 H8 107.273
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-311+G(3df,2pd) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.220      
2 N -0.425      
3 N -0.358      
4 H 0.104      
5 H 0.104      
6 H 0.130      
7 H 0.112      
8 H 0.112      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.890 -2.185 0.000 2.359
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.999 3.249 -0.000
y 3.249 -12.224 0.001
z -0.000 0.001 -12.815
Traceless
 xyz
x -3.480 3.249 -0.000
y 3.249 2.183 0.001
z -0.000 0.001 1.297
Polar
3z2-r22.593
x2-y2-3.775
xy3.249
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> 72.217
(<r2>)1/2 8.498