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

using model chemistry: MP2/TZVP

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/TZVP
 hartrees
Energy at 0K-112.837625
Energy at 298.15K 
HF Energy-112.435795
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy40.311374
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/TZVP
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 3663 3472 0.00      
2 Ag 3513 3330 0.00      
3 Ag 1672 1585 0.00      
4 Ag 1116 1058 0.00      
5 Ag 440 418 0.00      
6 Ag 133 126 0.00      
7 Au 3675 3484 5.83      
8 Au 1686 1598 34.51      
9 Au 235 223 115.08      
10 Au 89 84 21.53      
11 Bg 3675 3484 0.00      
12 Bg 1671 1584 0.00      
13 Bg 108 102 0.00      
14 Bu 3663 3472 35.20      
15 Bu 3518 3334 12.44      
16 Bu 1652 1566 25.41      
17 Bu 1094 1037 412.61      
18 Bu 64i 61i 249.06      

Unscaled Zero Point Vibrational Energy (zpe) 15768.7 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 14947.1 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 MP2/TZVP
ABC
4.61891 0.18492 0.18157

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/TZVP

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.681 0.831 0.000
N2 0.000 1.581 0.000
N3 0.000 -1.581 0.000
H4 0.180 2.155 0.813
H5 0.180 2.155 -0.813
H6 -0.681 -0.831 0.000
H7 -0.180 -2.155 -0.813
H8 -0.180 -2.155 0.813

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.01332.50601.63321.63322.14913.21243.2124
N21.01333.16141.01181.01182.50603.82773.8277
N32.50603.16143.82773.82771.01331.01181.0118
H41.63321.01183.82771.62633.21244.62124.3256
H51.63321.01183.82771.62633.21244.32564.6212
H62.14912.50601.01333.21243.21241.63321.6332
H73.21243.82771.01184.62124.32561.63321.6263
H83.21243.82771.01184.32564.62121.63321.6263

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 107.509 H1 N2 H5 107.509
H1 H3 N6 58.044 H1 H3 H7 126.500
H1 H3 H8 126.500 N2 H1 H3 121.956
H4 N2 H5 106.967 N6 H3 H7 107.509
N6 H3 H8 107.509 H7 H3 H8 106.967
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 ()

Jump to S1C1
Energy calculated at MP2/TZVP
 hartrees
Energy at 0K-112.837727
Energy at 298.15K-112.842937
HF Energy-112.436025
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy39.882879
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/TZVP
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' 3670 3479 7.16      
2 A' 3639 3450 52.40      
3 A' 3523 3339 0.73      
4 A' 3493 3311 69.80      
5 A' 1667 1580 14.72      
6 A' 1659 1572 17.58      
7 A' 1121 1063 180.88      
8 A' 1108 1051 183.19      
9 A' 397 377 59.25      
10 A' 142 135 14.53      
11 A' 54 51 103.07      
12 A" 3677 3486 0.70      
13 A" 3672 3480 5.26      
14 A" 1703 1614 20.98      
15 A" 1662 1576 16.61      
16 A" 291 276 63.96      
17 A" 132 125 42.67      
18 A" 35 33 18.43      

Unscaled Zero Point Vibrational Energy (zpe) 15823.1 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 14998.7 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/TZVP
ABC
4.02688 0.17660 0.17453

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.169 0.694 0.000
N2 -0.027 1.682 0.000
N3 -0.027 -1.592 0.000
H4 0.340 2.125 0.820
H5 0.340 2.125 -0.820
H6 -1.020 -1.441 0.000
H7 0.271 -2.068 -0.832
H8 0.271 -2.068 0.832

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.00732.29361.65861.65862.44332.88572.8857
N21.00733.27341.00181.00183.27713.85223.8522
N32.29363.27343.82383.82381.00441.00361.0036
H41.65861.00183.82381.64033.90384.50704.1934
H51.65861.00183.82381.64033.90384.19344.5070
H62.44333.27711.00443.90383.90381.65841.6584
H72.88573.85221.00364.50704.19341.65841.6637
H82.88573.85221.00364.19344.50701.65841.6637

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 111.294 H1 N2 H5 111.294
H1 H3 N6 86.270 H1 H3 H7 116.575
H1 H3 H8 116.575 N2 H1 H3 163.933
H4 N2 H5 109.909 N6 H3 H7 111.361
N6 H3 H8 111.361 H7 H3 H8 111.970
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability