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

using model chemistry: HF_cp_opt/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no    
Energy calculated at HF_cp_opt/3-21G
 hartrees
Energy at 0K-55.872165
Energy at 298.15K-55.877569
HF Energy-55.872165
Nuclear repulsion energy12.019633
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 HF_cp_opt/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 A' 3778 3422 2.10      
2 A' 3743 3389 42.90      
3 A' 3630 3287 0.31      
4 A' 3590 3251 80.82      
5 A' 1868 1691 15.96      
6 A' 1862 1686 24.80      
7 A' 991 898 378.97      
8 A' 982 889 394.60      
9 A' 420 380 67.70      
10 A' 152 138 88.97      
11 A' 128 115 2.36      
12 A" 3780 3423 1.17      
13 A" 3773 3417 1.15      
14 A" 1898 1718 32.46      
15 A" 1864 1688 20.07      
16 A" 318 288 69.83      
17 A" 154 139 41.41      
18 A" 32 29 25.85      

Unscaled Zero Point Vibrational Energy (zpe) 16480.1 cm-1
Scaled (by 0.9056) Zero Point Vibrational Energy (zpe) 14924.4 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 HF_cp_opt/3-21G
ABC
3.86645 0.17217 0.17011

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.025 0.694 0.000
N2 -0.031 1.701 0.000
N3 -0.031 -1.594 0.000
H4 0.369 2.104 0.828
H5 0.369 2.104 -0.828
H6 -1.035 -1.624 0.000
H7 0.350 -2.012 -0.830
H8 0.350 -2.012 0.830

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.00862.28851.67091.67092.54822.84842.8484
N21.00863.29491.00401.00403.47273.82313.8231
N32.28853.29493.81033.81031.00471.00431.0043
H41.67091.00403.81031.65664.06804.43684.1152
H51.67091.00403.81031.65664.06804.11524.4368
H62.54823.47271.00474.06804.06801.66091.6609
H72.84843.82311.00434.43684.11521.66091.6605
H82.84843.82311.00434.11524.43681.66091.6605

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 112.247 H1 N2 H5 112.247
H1 H3 N6 93.075 H1 H3 H7 113.970
H1 H3 H8 113.970 N2 H1 H3 175.437
H4 N2 H5 111.185 N6 H3 H7 111.530
N6 H3 H8 111.530 H7 H3 H8 111.515
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF_cp_opt/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.000      
2 N 0.000      
3 N -0.871      
4 H 0.000      
5 H 0.000      
6 H 0.291      
7 H 0.290      
8 H 0.290      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.186 -2.867 0.000 3.103
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.219 3.741 0.000
y 3.741 -10.183 0.000
z 0.000 0.000 -11.616
Traceless
 xyz
x -3.319 3.741 0.000
y 3.741 2.734 0.000
z 0.000 0.000 0.585
Polar
3z2-r21.170
x2-y2-4.036
xy3.741
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.042 -0.310 0.000
y -0.310 0.514 0.000
z 0.000 0.000 1.181


<r2> (average value of r2) Å2
<r2> 69.949
(<r2>)1/2 8.364