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

using model chemistry: MP2/6-31G

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 MP2/6-31G
 hartrees
Energy at 0K-112.567636
Energy at 298.15K-112.573250
HF Energy-112.334567
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy40.358169
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 MP2/6-31G
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 3718 3557 0.00      
2 Ag 3525 3373 0.00      
3 Ag 1757 1681 0.00      
4 Ag 917 877 0.00      
5 Ag 527 504 0.00      
6 Ag 161 154 0.00      
7 Au 3734 3572 5.99      
8 Au 1783 1706 62.79      
9 Au 280 268 102.75      
10 Au 128 122 27.15      
11 Bg 3733 3572 0.00      
12 Bg 1763 1687 0.00      
13 Bg 183 175 0.00      
14 Bu 3719 3559 55.54      
15 Bu 3533 3381 21.14      
16 Bu 1743 1667 52.63      
17 Bu 827 791 920.14      
18 Bu 126 121 294.15      

Unscaled Zero Point Vibrational Energy (zpe) 16078.0 cm-1
Scaled (by 0.9568) Zero Point Vibrational Energy (zpe) 15383.4 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 MP2/6-31G
ABC
4.60397 0.18661 0.18240

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.630 0.785 0.000
N2 0.000 1.580 0.000
N3 0.000 -1.580 0.000
H4 0.046 2.136 0.844
H5 0.046 2.136 -0.844
H6 -0.630 -0.785 0.000
H7 -0.046 -2.136 -0.844
H8 -0.046 -2.136 0.844

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.01442.44691.69711.69712.01263.11453.1145
N21.01443.15951.01231.01232.44693.81083.8108
N32.44693.15953.81083.81081.01441.01231.0123
H41.69711.01233.81081.68903.11454.59474.2730
H51.69711.01233.81081.68903.11454.27304.5947
H62.01262.44691.01443.11453.11451.69711.6971
H73.11453.81081.01234.59474.27301.69711.6890
H83.11453.81081.01234.27304.59471.69711.6890

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 113.736 H1 N2 H5 113.736
H1 H3 N6 53.312 H1 H3 H7 122.865
H1 H3 H8 122.865 N2 H1 H3 126.688
H4 N2 H5 113.077 N6 H3 H7 113.736
N6 H3 H8 113.736 H7 H3 H8 113.077
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 ()

Jump to S1C1
Energy calculated at MP2/6-31G
 hartrees
Energy at 0K-112.567636
Energy at 298.15K-112.573248
HF Energy-112.334573
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy40.366001
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 MP2/6-31G
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' 3720 3559 55.73      
2 A' 3718 3557 0.12      
3 A' 3534 3381 21.38      
4 A' 3526 3373 0.00      
5 A' 1757 1681 0.00      
6 A' 1742 1667 52.74      
7 A' 916 876 0.00      
8 A' 825 789 922.69      
9 A' 527 505 0.00      
10 A' 162 155 0.00      
11 A' 127 122 293.57      
12 A" 3735 3573 4.93      
13 A" 3734 3573 1.15      
14 A" 1783 1706 62.89      
15 A" 1763 1687 0.00      
16 A" 279 267 101.96      
17 A" 183 175 0.00      
18 A" 127 121 27.49      

Unscaled Zero Point Vibrational Energy (zpe) 16077.9 cm-1
Scaled (by 0.9568) Zero Point Vibrational Energy (zpe) 15383.4 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 MP2/6-31G
ABC
4.60543 0.18674 0.18252

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.173 0.679 0.000
N2 -0.020 1.675 0.000
N3 -0.020 -1.602 0.000
H4 0.256 2.157 0.843
H5 0.256 2.157 -0.843
H6 -1.013 -1.409 0.000
H7 0.306 -2.048 -0.847
H8 0.306 -2.048 0.847

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.01472.28931.70391.70392.40162.85822.8582
N21.01473.27731.00981.00983.24023.83183.8318
N32.28933.27733.86283.86281.01171.01131.0113
H41.70391.00983.86281.68603.87854.53224.2052
H51.70391.00983.86281.68603.87854.20524.5322
H62.40163.24021.01173.87853.87851.69321.6932
H72.85823.83181.01134.53224.20521.69321.6944
H82.85823.83181.01134.20524.53221.69321.6944

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 114.629 H1 N2 H5 114.629
H1 H3 N6 83.843 H1 H3 H7 114.303
H1 H3 H8 114.303 N2 H1 H3 164.184
H4 N2 H5 113.194 N6 H3 H7 113.640
N6 H3 H8 113.640 H7 H3 H8 113.803
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability