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

using model chemistry: MP2/6-311G**

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 MP2/6-311G**
 hartrees
Energy at 0K-112.825340
Energy at 298.15K-112.830827
HF Energy-112.424574
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy40.526204
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 MP2/6-311G**
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 3654 3472 0.00      
2 Ag 3511 3336 0.00      
3 Ag 1682 1598 0.00      
4 Ag 1158 1100 0.00      
5 Ag 464 441 0.00      
6 Ag 151 144 0.00      
7 Au 3666 3483 1.28      
8 Au 1699 1614 29.41      
9 Au 247 234 102.65      
10 Au 100 95 24.10      
11 Bg 3666 3483 0.00      
12 Bg 1687 1603 0.00      
13 Bg 138 131 0.00      
14 Bu 3653 3471 25.02      
15 Bu 3516 3341 13.81      
16 Bu 1654 1571 16.90      
17 Bu 1138 1082 359.55      
18 Bu 120 114 269.78      

Unscaled Zero Point Vibrational Energy (zpe) 15950.9 cm-1
Scaled (by 0.9502) Zero Point Vibrational Energy (zpe) 15156.6 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 MP2/6-311G**
ABC
4.63435 0.19005 0.18656

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G**

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.669 0.795 0.000
N2 0.000 1.559 0.000
N3 0.000 -1.559 0.000
H4 0.214 2.129 0.811
H5 0.214 2.129 -0.811
H6 -0.669 -0.795 0.000
H7 -0.214 -2.129 -0.811
H8 -0.214 -2.129 0.811

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.01562.44661.62631.62632.07693.15993.1599
N21.01563.11791.01401.01402.44663.78233.7823
N32.44663.11793.78233.78231.01561.01401.0140
H41.62631.01403.78231.62123.15994.57674.2800
H51.62631.01403.78231.62123.15994.28004.5767
H62.07692.44661.01563.15993.15991.62631.6263
H73.15993.78231.01404.57674.28001.62631.6212
H83.15993.78231.01404.28004.57671.62631.6212

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 106.501 H1 N2 H5 106.501
H1 H3 N6 57.037 H1 H3 H7 126.780
H1 H3 H8 126.780 N2 H1 H3 122.963
H4 N2 H5 106.143 N6 H3 H7 106.501
N6 H3 H8 106.501 H7 H3 H8 106.143
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 ()

Jump to S1C1
Energy calculated at MP2/6-311G**
 hartrees
Energy at 0K-112.825340
Energy at 298.15K-112.830820
HF Energy-112.424578
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy40.524326
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 MP2/6-311G**
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' 3654 3472 0.01      
2 A' 3653 3471 24.89      
3 A' 3516 3341 13.86      
4 A' 3511 3336 0.00      
5 A' 1682 1598 0.00      
6 A' 1654 1571 16.91      
7 A' 1158 1100 0.00      
8 A' 1138 1082 359.56      
9 A' 463 440 0.00      
10 A' 151 144 0.00      
11 A' 120 114 269.74      
12 A" 3666 3484 1.21      
13 A" 3666 3483 0.08      
14 A" 1699 1614 29.41      
15 A" 1687 1603 0.00      
16 A" 247 234 102.44      
17 A" 137 130 0.00      
18 A" 99 94 24.31      

Unscaled Zero Point Vibrational Energy (zpe) 15949.2 cm-1
Scaled (by 0.9502) Zero Point Vibrational Energy (zpe) 15155.0 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 MP2/6-311G**
ABC
4.63391 0.19000 0.18651

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.168 0.690 0.000
N2 -0.028 1.679 0.000
N3 -0.028 -1.587 0.000
H4 0.355 2.115 0.817
H5 0.355 2.115 -0.817
H6 -1.022 -1.435 0.000
H7 0.266 -2.066 -0.833
H8 0.266 -2.066 0.833

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.00772.28571.65331.65332.43612.88092.8809
N21.00773.26581.00241.00243.26923.84743.8474
N32.28573.26583.81063.81061.00541.00451.0045
H41.65331.00243.81061.63453.89504.49584.1821
H51.65331.00243.81061.63453.89504.18214.4958
H62.43613.26921.00543.89503.89501.65781.6578
H72.88093.84741.00454.49584.18211.65781.6656
H82.88093.84741.00454.18214.49581.65781.6656

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 110.665 H1 N2 H5 110.665
H1 H3 N6 86.253 H1 H3 H7 116.740
H1 H3 H8 116.740 N2 H1 H3 163.890
H4 N2 H5 109.237 N6 H3 H7 111.146
N6 H3 H8 111.146 H7 H3 H8 111.999
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability