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

using model chemistry: PBEPBE_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 PBEPBE_cp_opt/6-31G*
 hartrees
Energy at 0K-56.470479
Energy at 298.15K-56.475863
HF Energy-56.470479
Nuclear repulsion energy11.790377
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 PBEPBE_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 28.41      
3 A' 3358 3310 0.88      
4 A' 3261 3214 166.15      
5 A' 1694 1670 6.96      
6 A' 1677 1653 14.98      
7 A' 1186 1169 124.47      
8 A' 1137 1120 145.08      
9 A' 428 421 73.62      
10 A' 166 164 33.45      
11 A' 118 116 83.55      
12 A" 3496 3446 0.01      
13 A" 3469 3419 5.62      
14 A" 1727 1702 12.35      
15 A" 1685 1661 17.80      
16 A" 314 310 67.05      
17 A" 137 135 56.73      
18 A" 17 17 15.50      

Unscaled Zero Point Vibrational Energy (zpe) 15388.8 cm-1
Scaled (by 0.9857) Zero Point Vibrational Energy (zpe) 15168.7 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 PBEPBE_cp_opt/6-31G*
ABC
3.84903 0.18241 0.18052

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.113 0.638 0.000
N2 -0.036 1.664 0.000
N3 -0.036 -1.519 0.000
H4 0.492 2.010 0.812
H5 0.492 2.010 -0.812
H6 -1.064 -1.520 0.000
H7 0.237 -2.077 -0.817
H8 0.237 -2.077 0.817

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.03652.16241.63821.63822.45882.83882.8388
N21.03653.18281.02841.02843.34603.83943.8394
N32.16243.18283.65943.65941.02731.02711.0271
H41.63821.02843.65941.62343.94254.40754.0954
H51.63821.02843.65941.62343.94254.09544.4075
H62.45883.34601.02733.94253.94251.63431.6343
H72.83883.83941.02714.40754.09541.63431.6345
H82.83883.83941.02714.09544.40751.63431.6345

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 104.999 H1 N2 H5 104.999
H1 H3 N6 94.058 H1 H3 H7 121.607
H1 H3 H8 121.607 N2 H1 H3 167.723
H4 N2 H5 104.233 N6 H3 H7 105.408
N6 H3 H8 105.408 H7 H3 H8 105.450
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE_cp_opt/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.000      
2 N 0.000      
3 N -0.895      
4 H 0.000      
5 H 0.000      
6 H 0.298      
7 H 0.298      
8 H 0.298      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.046 -3.053 0.000 3.228
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.734 4.149 0.000
y 4.149 -11.204 0.000
z 0.000 0.000 -12.490
Traceless
 xyz
x -2.887 4.149 0.000
y 4.149 2.409 0.000
z 0.000 0.000 0.479
Polar
3z2-r20.958
x2-y2-3.531
xy4.149
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.931 -0.184 0.000
y -0.184 1.362 0.000
z 0.000 0.000 1.422


<r2> (average value of r2) Å2
<r2> 67.375
(<r2>)1/2 8.208