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

using model chemistry: PBEPBE/6-311+G(3df,2pd)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no    
Energy calculated at PBEPBE/6-311+G(3df,2pd)
 hartrees
Energy at 0K-113.025217
Energy at 298.15K-113.030373
HF Energy-113.025217
Counterpoise corrected energy-56.510042
CP Energy at 298.15K-56.515181
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy39.585341
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/6-311+G(3df,2pd)
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' 3518 3482 6.61      
2 A' 3463 3429 50.40      
3 A' 3396 3362 4.30      
4 A' 3321 3288 152.83      
5 A' 1620 1604 16.05      
6 A' 1610 1594 12.55      
7 A' 1052 1042 99.43      
8 A' 1036 1025 142.74      
9 A' 383 380 51.07      
10 A' 140 139 17.60      
11 A' 98 97 56.60      
12 A" 3520 3484 5.77      
13 A" 3512 3477 0.74      
14 A" 1644 1627 8.00      
15 A" 1617 1601 19.08      
16 A" 266 263 34.34      
17 A" 123 121 36.57      
18 A" 15 15 14.12      

Unscaled Zero Point Vibrational Energy (zpe) 15166.8 cm-1
Scaled (by 0.99) Zero Point Vibrational Energy (zpe) 15015.1 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/6-311+G(3df,2pd)
ABC
3.87217 0.17519 0.17332

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311+G(3df,2pd)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.133 0.678 0.000
N2 -0.036 1.692 0.000
N3 -0.036 -1.558 0.000
H4 0.447 2.072 0.816
H5 0.447 2.072 -0.816
H6 -1.058 -1.586 0.000
H7 0.270 -2.087 -0.819
H8 0.270 -2.087 0.819

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.02862.24221.64591.64592.55722.88642.8864
N21.02863.25051.02181.02183.43343.87883.8788
N32.24223.25053.75203.75201.02181.02151.0215
H41.64591.02183.75201.63274.03834.47204.1624
H51.64591.02183.75201.63274.03834.16244.4720
H62.55723.43341.02184.03834.03831.63821.6382
H72.88643.87881.02154.47204.16241.63821.6376
H82.88643.87881.02154.16244.47201.63821.6376

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 106.786 H1 N2 H5 106.786
H1 H3 N6 95.859 H1 H3 H7 119.563
H1 H3 H8 119.563 N2 H1 H3 166.229
H4 N2 H5 106.062 N6 H3 H7 106.595
N6 H3 H8 106.595 H7 H3 H8 106.559
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311+G(3df,2pd) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.216      
2 N -0.367      
3 N -0.281      
4 H 0.078      
5 H 0.078      
6 H 0.105      
7 H 0.085      
8 H 0.085      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.925 -2.346 0.000 2.522
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.019 3.245 -0.000
y 3.245 -12.670 0.001
z -0.000 0.001 -12.971
Traceless
 xyz
x -3.198 3.245 -0.000
y 3.245 1.825 0.001
z -0.000 0.001 1.373
Polar
3z2-r22.747
x2-y2-3.349
xy3.245
xz-0.000
yz0.001


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


<r2> (average value of r2) Å2
<r2> 70.356
(<r2>)1/2 8.388