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

using model chemistry: CCSD(T)/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no    
1 2 no    

Conformer 1 ()

Jump to S1C2
Energy calculated at CCSD(T)/6-31G*
 hartrees
Energy at 0K-112.751402
Energy at 298.15K-112.756813
HF Energy-112.371745
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy40.206649
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 CCSD(T)/6-31G*
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 3572 3436        
2 Ag 3429 3299        
3 Ag 1753 1686        
4 Ag 1220 1174        
5 Ag 482 463        
6 Ag 151 146        
7 Au 3570 3435        
8 Au 1769 1702        
9 Au 259 249        
10 Au 79 76        
11 Bg 3570 3434        
12 Bg 1756 1690        
13 Bg 120 116        
14 Bu 3571 3436        
15 Bu 3432 3302        
16 Bu 1728 1663        
17 Bu 1196 1151        
18 Bu 101 97        

Unscaled Zero Point Vibrational Energy (zpe) 15878.4 cm-1
Scaled (by 0.9621) Zero Point Vibrational Energy (zpe) 15276.6 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 CCSD(T)/6-31G*
ABC
4.57403 0.18659 0.18320

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-31G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.671 0.802 0.000
N2 0.000 1.574 0.000
N3 0.000 -1.574 0.000
H4 0.225 2.147 0.815
H5 0.225 2.147 -0.815
H6 -0.671 -0.802 0.000
H7 -0.225 -2.147 -0.815
H8 -0.225 -2.147 0.815

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.02252.46841.63531.63532.09103.18833.1883
N21.02253.14721.02191.02192.46843.81593.8159
N32.46843.14723.81593.81591.02251.02191.0219
H41.63531.02193.81591.63053.18834.61594.3184
H51.63531.02193.81591.63053.18834.31844.6159
H62.09102.46841.02253.18833.18831.63531.6353
H73.18833.81591.02194.61594.31841.63531.6305
H83.18833.81591.02194.31844.61591.63531.6305

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 106.239 H1 N2 H5 106.239
H1 H3 N6 56.768 H1 H3 H7 126.881
H1 H3 H8 126.881 N2 H1 H3 123.232
H4 N2 H5 105.825 N6 H3 H7 106.239
N6 H3 H8 106.239 H7 H3 H8 105.825
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 ()

Jump to S1C1
Energy calculated at CCSD(T)/6-31G*
 hartrees
Energy at 0K-112.751402
Energy at 298.15K-112.756864
HF Energy-112.371729
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy40.206189
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 CCSD(T)/6-31G*
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' 3573 3437        
2 A' 3572 3437        
3 A' 3433 3303        
4 A' 3430 3300        
5 A' 1754 1687        
6 A' 1729 1664        
7 A' 1219 1173        
8 A' 1194 1149        
9 A' 484 465        
10 A' 151 146        
11 A' 103 99        
12 A" 3571 3436        
13 A" 3571 3435        
14 A" 1768 1701        
15 A" 1756 1689        
16 A" 256 246        
17 A" 129 124        
18 A" 99 95        

Unscaled Zero Point Vibrational Energy (zpe) 15895.1 cm-1
Scaled (by 0.9621) Zero Point Vibrational Energy (zpe) 15292.6 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 CCSD(T)/6-31G*
ABC
4.58066 0.18655 0.18315

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -0.669 -0.801 0.000
N2 -0.000 -1.574 0.000
N3 -0.000 1.574 0.000
H4 -0.225 -2.147 0.815
H5 -0.225 -2.147 -0.815
H6 0.668 0.800 0.000
H7 0.226 2.147 -0.815
H8 0.226 2.147 0.815

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.02242.46721.63561.63562.08533.18683.1868
N21.02243.14791.02181.02182.46583.81603.8160
N32.46723.14793.81633.81631.02241.02181.0218
H41.63561.02183.81631.63033.18554.61584.3183
H51.63561.02183.81631.63033.18554.31834.6158
H62.08532.46581.02243.18553.18551.63561.6356
H73.18683.81601.02184.61584.31831.63561.6303
H83.18683.81601.02184.31834.61581.63561.6303

picture of Ammonia Dimer state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 N2 H4 106.283 H1 N2 H5 106.283
H1 H3 N6 56.511 H1 H3 H7 126.865
H1 H3 H8 126.865 N2 H1 H3 123.397
H4 N2 H5 105.832 N6 H3 H7 106.277
N6 H3 H8 106.277 H7 H3 H8 105.828
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability