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

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/6-311+G(3df,2pd)
 hartrees
Energy at 0K-113.025222
Energy at 298.15K-113.030403
HF Energy-113.025222
Counterpoise corrected energy-56.510043
CP Energy at 298.15K-56.515197
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy39.540264
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/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' 3517 3482 6.52      
2 A' 3465 3430 50.71      
3 A' 3396 3362 4.40      
4 A' 3324 3291 147.16      
5 A' 1620 1604 16.22      
6 A' 1610 1594 12.38      
7 A' 1051 1041 97.76      
8 A' 1038 1027 144.18      
9 A' 381 377 51.01      
10 A' 138 136 18.08      
11 A' 96 95 56.46      
12 A" 3519 3484 5.73      
13 A" 3513 3478 0.75      
14 A" 1644 1627 8.01      
15 A" 1618 1601 19.17      
16 A" 264 261 35.25      
17 A" 124 123 35.44      
18 A" 33 32 14.64      

Unscaled Zero Point Vibrational Energy (zpe) 15174.2 cm-1
Scaled (by 0.99) Zero Point Vibrational Energy (zpe) 15022.5 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/6-311+G(3df,2pd)
ABC
3.87379 0.17425 0.17241

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.135 0.683 0.000
N2 -0.036 1.697 0.000
N3 -0.036 -1.563 0.000
H4 0.446 2.078 0.816
H5 0.446 2.078 -0.816
H6 -1.058 -1.591 0.000
H7 0.270 -2.092 -0.819
H8 0.270 -2.092 0.819

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.02842.25191.64571.64572.56802.89582.8958
N21.02843.25931.02171.02173.44283.88793.8879
N32.25193.25933.76173.76171.02191.02161.0216
H41.64571.02173.76171.63274.04804.48194.1731
H51.64571.02173.76171.63274.04804.17314.4819
H62.56803.44281.02194.04804.04801.63791.6379
H72.89583.88791.02164.48194.17311.63791.6372
H82.89583.88791.02164.17314.48191.63791.6372

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 106.783 H1 N2 H5 106.783
H1 H3 N6 95.972 H1 H3 H7 119.576
H1 H3 H8 119.576 N2 H1 H3 166.008
H4 N2 H5 106.067 N6 H3 H7 106.551
N6 H3 H8 106.551 H7 H3 H8 106.512
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-311+G(3df,2pd) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.215      
2 N -0.366      
3 N -0.281      
4 H 0.078      
5 H 0.078      
6 H 0.104      
7 H 0.086      
8 H 0.086      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.925 -2.337 0.000 2.514
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.022 3.251 0.000
y 3.251 -12.625 0.000
z 0.000 0.000 -12.975
Traceless
 xyz
x -3.223 3.251 0.000
y 3.251 1.874 0.000
z 0.000 0.000 1.349
Polar
3z2-r22.697
x2-y2-3.398
xy3.251
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.200 0.108 0.000
y 0.108 5.036 0.000
z 0.000 0.000 3.769


<r2> (average value of r2) Å2
<r2> 70.662
(<r2>)1/2 8.406