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

using model chemistry: PBEPBEultrafine_cp_opt/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no    
Energy calculated at PBEPBEultrafine_cp_opt/6-31+G**
 hartrees
Energy at 0K-56.490015
Energy at 298.15K-56.495279
HF Energy-56.490015
Nuclear repulsion energy11.817930
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 PBEPBEultrafine_cp_opt/6-31+G**
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' 3548 3508 7.08      
2 A' 3493 3453 54.31      
3 A' 3404 3365 2.92      
4 A' 3333 3295 144.75      
5 A' 1636 1617 14.77      
6 A' 1622 1603 29.27      
7 A' 1040 1029 105.65      
8 A' 1022 1011 320.44      
9 A' 420 415 48.53      
10 A' 151 149 39.20      
11 A' 89 88 112.54      
12 A" 3553 3512 5.10      
13 A" 3546 3505 0.73      
14 A" 1658 1639 24.14      
15 A" 1634 1616 24.37      
16 A" 264 261 63.33      
17 A" 127 126 55.23      
18 A" 51 51 6.33      

Unscaled Zero Point Vibrational Energy (zpe) 15296.3 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 15121.9 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 PBEPBEultrafine_cp_opt/6-31+G**
ABC
4.02791 0.17950 0.17707

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.259 0.666 0.000
N2 -0.025 1.656 0.000
N3 -0.025 -1.552 0.000
H4 0.391 2.101 0.823
H5 0.391 2.101 -0.823
H6 -1.029 -1.347 0.000
H7 0.171 -2.125 -0.825
H8 0.171 -2.125 0.825

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.03062.23581.65941.65942.38942.91112.9111
N21.03063.20831.02361.02363.16673.87503.8750
N32.23583.20833.76733.76731.02411.02341.0234
H41.65941.02363.76731.64513.81864.54064.2312
H51.65941.02363.76731.64513.81864.23124.5406
H62.38943.16671.02413.81863.81861.65101.6510
H72.91113.87501.02344.54064.23121.65101.6499
H82.91113.87501.02344.23124.54061.65101.6499

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 107.765 H1 N2 H5 107.765
H1 H3 N6 85.764 H1 H3 H7 122.054
H1 H3 H8 122.054 N2 H1 H3 156.704
H4 N2 H5 106.946 N6 H3 H7 107.480
N6 H3 H8 107.480 H7 H3 H8 107.428
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine_cp_opt/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.000      
2 N 0.000      
3 N -0.898      
4 H 0.000      
5 H 0.000      
6 H 0.299      
7 H 0.299      
8 H 0.299      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.782 -2.091 0.000 2.232
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.876 3.541 0.000
y 3.541 -11.562 0.000
z 0.000 0.000 -12.843
Traceless
 xyz
x -4.673 3.541 0.000
y 3.541 3.297 0.000
z 0.000 0.000 1.376
Polar
3z2-r22.752
x2-y2-5.313
xy3.541
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.589 0.103 0.000
y 0.103 1.936 0.000
z 0.000 0.000 1.559


<r2> (average value of r2) Å2
<r2> 68.986
(<r2>)1/2 8.306