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

using model chemistry: PBEPBEultrafine/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no    
Energy calculated at PBEPBEultrafine/3-21G
 hartrees
Energy at 0K-112.319342
Energy at 298.15K-112.325604
HF Energy-112.319342
Counterpoise corrected energy-56.150852
CP Energy at 298.15K-56.156547
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy41.755793
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/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 3358 0.00      
2 Ag 3193 3164 0.00      
3 Ag 1711 1696 0.00      
4 Ag 1045 1036 0.00      
5 Ag 621 615 0.00      
6 Ag 245 243 0.00      
7 Au 3442 3411 4.17      
8 Au 1747 1731 26.14      
9 Au 390 386 89.36      
10 Au 171 169 45.80      
11 Bg 3441 3410 0.00      
12 Bg 1732 1716 0.00      
13 Bg 251 249 0.00      
14 Bu 3390 3359 36.08      
15 Bu 3226 3196 203.62      
16 Bu 1667 1651 10.58      
17 Bu 848 840 480.66      
18 Bu 215 213 460.08      

Unscaled Zero Point Vibrational Energy (zpe) 15361.6 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 15221.8 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/3-21G
ABC
4.51207 0.22794 0.22198

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.646 0.603 0.000
N2 0.000 1.417 0.000
N3 0.000 -1.417 0.000
H4 0.147 1.996 0.842
H5 0.147 1.996 -0.842
H6 -0.646 -0.603 0.000
H7 -0.147 -1.996 -0.842
H8 -0.147 -1.996 0.842

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.03942.12101.70251.70251.76792.84462.8446
N21.03942.83421.03241.03242.12103.51823.5182
N32.12102.83423.51823.51821.03941.03241.0324
H41.70251.03243.51821.68492.84464.34224.0020
H51.70251.03243.51821.68492.84464.00204.3422
H61.76792.12101.03942.84462.84461.70251.7025
H72.84463.51821.03244.34224.00201.70251.6849
H82.84463.51821.03244.00204.34221.70251.6849

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 110.519 H1 N2 H5 110.519
H1 H3 N6 56.188 H1 H3 H7 125.238
H1 H3 H8 125.238 N2 H1 H3 123.812
H4 N2 H5 109.371 N6 H3 H7 110.519
N6 H3 H8 110.519 H7 H3 H8 109.371
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/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 3.482 0.000
y 3.482 -8.649 0.000
z 0.000 0.000 -11.871
Traceless
 xyz
x -5.842 3.482 0.000
y 3.482 5.338 0.000
z 0.000 0.000 0.505
Polar
3z2-r21.009
x2-y2-7.453
xy3.482
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.167 -0.044 0.000
y -0.044 3.722 0.000
z 0.000 0.000 2.521


<r2> (average value of r2) Å2
<r2> 56.156
(<r2>)1/2 7.494