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

using model chemistry: PBEPBE/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no    
Energy calculated at PBEPBE/3-21G
 hartrees
Energy at 0K-112.319343
Energy at 298.15K-112.325609
HF Energy-112.319343
Counterpoise corrected energy-56.150852
CP Energy at 298.15K-56.156557
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy41.757761
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/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Ag 3389 3359 0.00      
2 Ag 3193 3164 0.00      
3 Ag 1711 1696 0.00      
4 Ag 1045 1035 0.00      
5 Ag 622 616 0.00      
6 Ag 246 243 0.00      
7 Au 3443 3411 4.19      
8 Au 1747 1731 26.15      
9 Au 390 386 88.59      
10 Au 172 170 46.48      
11 Bg 3441 3410 0.00      
12 Bg 1731 1716 0.00      
13 Bg 252 250 0.00      
14 Bu 3390 3359 36.05      
15 Bu 3226 3196 203.92      
16 Bu 1667 1652 10.60      
17 Bu 848 840 480.67      
18 Bu 216 214 460.26      

Unscaled Zero Point Vibrational Energy (zpe) 15363.5 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 15223.7 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/3-21G
ABC
4.51152 0.22801 0.22204

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/3-21G

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.647 0.603 0.000
N2 0.000 1.417 0.000
N3 0.000 -1.417 0.000
H4 0.146 1.995 0.842
H5 0.146 1.995 -0.842
H6 -0.647 -0.603 0.000
H7 -0.146 -1.995 -0.842
H8 -0.146 -1.995 0.842

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.03942.12081.70261.70261.76822.84442.8444
N21.03942.83371.03241.03242.12083.51783.5178
N32.12082.83373.51783.51781.03941.03241.0324
H41.70261.03243.51781.68492.84444.34194.0017
H51.70261.03243.51781.68492.84444.00174.3419
H61.76822.12081.03942.84442.84441.70261.7026
H72.84443.51781.03244.34194.00171.70261.6849
H82.84443.51781.03244.00174.34191.70261.6849

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 110.527 H1 N2 H5 110.527
H1 H3 N6 56.215 H1 H3 H7 125.238
H1 H3 H8 125.238 N2 H1 H3 123.785
H4 N2 H5 109.368 N6 H3 H7 110.527
N6 H3 H8 110.527 H7 H3 H8 109.368
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.285      
2 N -0.800      
3 N -0.800      
4 H 0.257      
5 H 0.257      
6 H 0.285      
7 H 0.257      
8 H 0.257      


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


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.102 3.477 0.000
y 3.477 -8.647 0.000
z 0.000 0.000 -11.871
Traceless
 xyz
x -5.842 3.477 0.000
y 3.477 5.339 0.000
z 0.000 0.000 0.503
Polar
3z2-r21.006
x2-y2-7.454
xy3.477
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.168 -0.044 0.000
y -0.044 3.723 0.000
z 0.000 0.000 2.521


<r2> (average value of r2) Å2
<r2> 56.144
(<r2>)1/2 7.493