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

using model chemistry: PBEPBEultrafine_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 PBEPBEultrafine_cp_opt/3-21G
 hartrees
Energy at 0K-56.150852
Energy at 298.15K-56.156547
HF Energy-56.150852
Nuclear repulsion energy11.697219
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/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' 3437 3406 0.39      
2 A' 3317 3286 13.50      
3 A' 3281 3251 2.80      
4 A' 3050 3022 332.99      
5 A' 1721 1706 2.66      
6 A' 1704 1688 14.94      
7 A' 984 975 185.86      
8 A' 891 882 213.15      
9 A' 486 482 82.97      
10 A' 196 194 36.86      
11 A' 161 160 71.11      
12 A" 3437 3406 0.70      
13 A" 3391 3360 19.88      
14 A" 1772 1756 15.47      
15 A" 1710 1695 15.53      
16 A" 409 405 62.23      
17 A" 183 181 52.27      
18 A" 30 30 25.25      

Unscaled Zero Point Vibrational Energy (zpe) 15079.5 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 14942.3 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/3-21G
ABC
3.68721 0.19747 0.19500

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.055 0.545 0.000
N2 -0.038 1.594 0.000
N3 -0.038 -1.463 0.000
H4 0.448 1.972 0.834
H5 0.448 1.972 -0.834
H6 -1.070 -1.517 0.000
H7 0.323 -1.944 -0.841
H8 0.323 -1.944 0.841

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.05242.01011.69841.69842.34902.64072.6407
N21.05243.05631.03611.03613.27763.65363.6536
N32.01013.05633.56743.56741.03361.03341.0334
H41.69841.03613.56741.66753.89504.26033.9175
H51.69841.03613.56741.66753.89503.91754.2603
H62.34903.27761.03363.89503.89501.68141.6814
H72.64073.65361.03344.26033.91751.68141.6815
H82.64073.65361.03343.91754.26031.68141.6815

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 108.825 H1 N2 H5 108.825
H1 H3 N6 95.650 H1 H3 H7 116.679
H1 H3 H8 116.679 N2 H1 H3 172.359
H4 N2 H5 107.161 N6 H3 H7 108.868
N6 H3 H8 108.868 H7 H3 H8 108.901
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine_cp_opt/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.000      
2 N 0.000      
3 N -0.778      
4 H 0.000      
5 H 0.000      
6 H 0.259      
7 H 0.259      
8 H 0.259      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.221 -3.601 0.000 3.802
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.188 3.875 0.000
y 3.875 -10.723 0.000
z 0.000 0.000 -12.028
Traceless
 xyz
x -2.812 3.875 0.000
y 3.875 2.385 0.000
z 0.000 0.000 0.428
Polar
3z2-r20.855
x2-y2-3.465
xy3.875
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.540 -0.275 0.000
y -0.275 1.214 0.000
z 0.000 0.000 1.285


<r2> (average value of r2) Å2
<r2> 62.955
(<r2>)1/2 7.934