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

using model chemistry: MP2/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-112.912392
Energy at 298.15K-112.917671
HF Energy-112.438942
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy40.487059
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/cc-pVTZ
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 3637 3454 0.00      
2 Ag 3496 3319 0.00      
3 Ag 1690 1605 0.00      
4 Ag 1119 1063 0.00      
5 Ag 449 426 0.00      
6 Ag 145 138 0.00      
7 Au 3653 3469 7.33      
8 Au 1704 1618 24.11      
9 Au 229 218 85.14      
10 Au 87 83 24.78      
11 Bg 3653 3469 0.00      
12 Bg 1693 1608 0.00      
13 Bg 117 111 0.00      
14 Bu 3637 3453 39.49      
15 Bu 3501 3324 17.13      
16 Bu 1668 1583 15.74      
17 Bu 1095 1040 309.67      
18 Bu 68 64 230.71      

Unscaled Zero Point Vibrational Energy (zpe) 15820.1 cm-1
Scaled (by 0.9495) Zero Point Vibrational Energy (zpe) 15021.2 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/cc-pVTZ
ABC
4.63903 0.18825 0.18488

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.641 0.766 0.000
N2 0.000 1.543 0.000
N3 0.000 -1.543 0.000
H4 0.152 2.100 0.821
H5 0.152 2.100 -0.821
H6 -0.641 -0.766 0.000
H7 -0.152 -2.100 -0.821
H8 -0.152 -2.100 0.821

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.00702.39671.64091.64091.99873.08573.0857
N21.00703.08571.00421.00422.39673.73753.7375
N32.39673.08573.73753.73751.00701.00421.0042
H41.64091.00423.73751.64293.08574.52034.2112
H51.64091.00423.73751.64293.08574.21124.5203
H61.99872.39671.00703.08573.08571.64091.6409
H73.08573.73751.00424.52034.21121.64091.6429
H83.08573.73751.00424.21124.52031.64091.6429

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 109.343 H1 N2 H5 109.343
H1 H3 N6 55.079 H1 H3 H7 125.117
H1 H3 H8 125.117 N2 H1 H3 124.921
H4 N2 H5 109.765 N6 H3 H7 109.343
N6 H3 H8 109.343 H7 H3 H8 109.765
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 ()

Jump to S1C1
Energy calculated at MP2/cc-pVTZ
 hartrees
Energy at 0K-112.912392
Energy at 298.15K-112.917671
HF Energy-112.438940
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy40.485979
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/cc-pVTZ
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' 3637 3454 1.16      
2 A' 3637 3453 38.34      
3 A' 3501 3324 17.12      
4 A' 3496 3319 0.00      
5 A' 1690 1605 0.00      
6 A' 1668 1583 15.74      
7 A' 1119 1063 0.00      
8 A' 1095 1040 309.67      
9 A' 449 426 0.00      
10 A' 145 138 0.00      
11 A' 68 64 230.69      
12 A" 3653 3469 7.33      
13 A" 3653 3469 0.00      
14 A" 1704 1618 24.11      
15 A" 1693 1608 0.00      
16 A" 229 217 85.14      
17 A" 117 111 0.00      
18 A" 87 83 24.79      

Unscaled Zero Point Vibrational Energy (zpe) 15820.1 cm-1
Scaled (by 0.9495) Zero Point Vibrational Energy (zpe) 15021.2 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/cc-pVTZ
ABC
4.63938 0.18822 0.18485

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.168 0.692 0.000
N2 -0.027 1.679 0.000
N3 -0.027 -1.588 0.000
H4 0.346 2.118 0.817
H5 0.346 2.118 -0.817
H6 -1.019 -1.438 0.000
H7 0.269 -2.063 -0.831
H8 0.269 -2.063 0.831

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.00532.28841.65241.65242.43892.87992.8799
N21.00533.26620.99980.99983.27063.84423.8442
N32.28843.26623.81263.81261.00281.00191.0019
H41.65240.99983.81261.63393.89544.49454.1816
H51.65240.99983.81261.63393.89544.18164.4945
H62.43893.27061.00283.89543.89541.65481.6548
H72.87993.84421.00194.49454.18161.65481.6615
H82.87993.84421.00194.18164.49451.65481.6615

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 110.991 H1 N2 H5 110.991
H1 H3 N6 86.327 H1 H3 H7 116.595
H1 H3 H8 116.595 N2 H1 H3 163.883
H4 N2 H5 109.593 N6 H3 H7 111.272
N6 H3 H8 111.272 H7 H3 H8 112.023
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability