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

using model chemistry: PBEPBEultrafine_cp_opt/6-31G*

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/6-31G*
 hartrees
Energy at 0K-56.470424
Energy at 298.15K-56.475827
HF Energy-56.470424
Nuclear repulsion energy11.749569
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/6-31G*
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' 3495 3445 0.35      
2 A' 3414 3365 28.29      
3 A' 3358 3310 0.88      
4 A' 3261 3214 166.12      
5 A' 1694 1670 6.97      
6 A' 1677 1653 14.96      
7 A' 1186 1169 124.29      
8 A' 1137 1121 145.28      
9 A' 428 422 73.58      
10 A' 166 163 32.13      
11 A' 116 115 85.17      
12 A" 3497 3447 0.01      
13 A" 3469 3420 5.61      
14 A" 1727 1702 12.37      
15 A" 1685 1661 17.78      
16 A" 314 310 67.07      
17 A" 137 135 56.91      
18 A" 29 28 15.38      

Unscaled Zero Point Vibrational Energy (zpe) 15394.6 cm-1
Scaled (by 0.9857) Zero Point Vibrational Energy (zpe) 15174.4 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 PBEPBEultrafine_cp_opt/6-31G*
ABC
3.85052 0.18244 0.18055

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -1.064 -1.518 0.000
N2 -0.036 -1.519 0.000
N3 -0.036 1.664 0.000
H4 0.236 -2.078 0.817
H5 0.236 -2.078 -0.817
H6 0.114 0.638 0.000
H7 0.492 2.010 -0.812
H8 0.492 2.010 0.812

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.02743.34371.63431.63432.45723.94063.9406
N21.02743.18261.02711.02712.16233.65953.6595
N33.34373.18263.83963.83961.03651.02841.0284
H41.63431.02713.83961.63452.83914.40834.0963
H51.63431.02713.83961.63452.83914.09634.4083
H62.45722.16231.03652.83912.83911.63821.6382
H73.94063.65951.02844.40834.09631.63821.6234
H83.94063.65951.02844.09634.40831.63821.6234

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 105.407 H1 N2 H5 105.407
H1 H3 N6 26.251 H1 H3 H7 118.581
H1 H3 H8 118.581 N2 H1 H3 72.140
H4 N2 H5 105.447 N6 H3 H7 104.998
N6 H3 H8 104.998 H7 H3 H8 104.232
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine_cp_opt/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.000      
2 N 0.000      
3 N -0.890      
4 H 0.000      
5 H 0.000      
6 H 0.296      
7 H 0.297      
8 H 0.297      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.043 -3.050 0.000 3.223
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.738 4.150 0.000
y 4.150 -11.198 0.000
z 0.000 0.000 -12.490
Traceless
 xyz
x -2.894 4.150 0.000
y 4.150 2.416 0.000
z 0.000 0.000 0.478
Polar
3z2-r20.955
x2-y2-3.540
xy4.150
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.938 -0.167 0.000
y -0.167 1.407 0.000
z 0.000 0.000 1.450


<r2> (average value of r2) Å2
<r2> 67.366
(<r2>)1/2 8.208