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

using model chemistry: MP2/6-31+G**

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 MP2/6-31+G**
 hartrees
Energy at 0K-112.790064
Energy at 298.15K 
HF Energy-112.404539
Counterpoise corrected energy-56.200489
CP Energy at 298.15K-56.205630
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy40.350299
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 MP2/6-31+G**
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 3708 3488 0.00      
2 Ag 3543 3332 0.00      
3 Ag 1712 1611 0.00      
4 Ag 1108 1043 0.00      
5 Ag 456 429 0.00      
6 Ag 144 136 0.00      
7 Au 3722 3501 12.32      
8 Au 1728 1625 50.06      
9 Au 243 229 114.74      
10 Au 85 80 23.66      
11 Bg 3722 3501 0.00      
12 Bg 1711 1609 0.00      
13 Bg 111 105 0.00      
14 Bu 3708 3488 47.10      
15 Bu 3548 3337 18.49      
16 Bu 1693 1593 38.59      
17 Bu 1076 1012 489.29      
18 Bu 74i 69i 241.54      

Unscaled Zero Point Vibrational Energy (zpe) 15972.7 cm-1
Scaled (by 0.9406) Zero Point Vibrational Energy (zpe) 15023.9 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 MP2/6-31+G**
ABC
4.59951 0.18641 0.18294

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.684 0.825 0.000
N2 0.000 1.574 0.000
N3 0.000 -1.574 0.000
H4 0.163 2.150 0.817
H5 0.163 2.150 -0.817
H6 -0.684 -0.825 0.000
H7 -0.163 -2.150 -0.817
H8 -0.163 -2.150 0.817

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.01422.49441.64141.64142.14293.19883.1988
N21.01423.14791.01251.01252.49443.81573.8157
N32.49443.14793.81573.81571.01421.01251.0125
H41.64141.01253.81571.63363.19884.61094.3118
H51.64141.01253.81571.63363.19884.31184.6109
H62.14292.49441.01423.19883.19881.64141.6414
H73.19883.81571.01254.61094.31181.64141.6336
H83.19883.81571.01254.31184.61091.64141.6336

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 108.168 H1 N2 H5 108.168
H1 H3 N6 58.300 H1 H3 H7 126.223
H1 H3 H8 126.223 N2 H1 H3 121.700
H4 N2 H5 107.553 N6 H3 H7 108.168
N6 H3 H8 108.168 H7 H3 H8 107.553
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 ()

Jump to S1C1
Energy calculated at MP2/6-31+G**
 hartrees
Energy at 0K-112.790470
Energy at 298.15K-112.795826
HF Energy-112.404950
Counterpoise corrected energy-56.200489
CP Energy at 298.15K-56.205630
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy39.820152
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 MP2/6-31+G**
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' 3716 3495 10.74      
2 A' 3687 3468 77.18      
3 A' 3553 3342 2.74      
4 A' 3524 3315 75.24      
5 A' 1706 1605 21.08      
6 A' 1697 1596 24.14      
7 A' 1103 1038 157.32      
8 A' 1098 1032 276.41      
9 A' 424 399 69.59      
10 A' 157 148 22.67      
11 A' 115 108 78.63      
12 A" 3725 3503 2.79      
13 A" 3715 3495 9.05      
14 A" 1745 1642 26.80      
15 A" 1699 1598 24.70      
16 A" 292 275 66.24      
17 A" 136 128 38.55      
18 A" 29 27 20.17      

Unscaled Zero Point Vibrational Energy (zpe) 16060.3 cm-1
Scaled (by 0.9406) Zero Point Vibrational Energy (zpe) 15106.3 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 MP2/6-31+G**
ABC
3.95130 0.17601 0.17401

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.170 0.692 0.000
N2 -0.026 1.682 0.000
N3 -0.026 -1.593 0.000
H4 0.331 2.130 0.824
H5 0.331 2.130 -0.824
H6 -1.020 -1.442 0.000
H7 0.276 -2.067 -0.833
H8 0.276 -2.067 0.833

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.00852.29341.66461.66462.44412.88412.8841
N21.00853.27441.00331.00333.27873.85183.8518
N32.29343.27443.82923.82921.00571.00491.0049
H41.66461.00333.82921.64743.90724.51224.1969
H51.66461.00333.82921.64743.90724.19694.5122
H62.44413.27871.00573.90723.90721.66231.6623
H72.88413.85181.00494.51224.19691.66231.6665
H82.88413.85181.00494.19694.51221.66231.6665

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 111.661 H1 N2 H5 111.661
H1 H3 N6 86.305 H1 H3 H7 116.389
H1 H3 H8 116.389 N2 H1 H3 163.928
H4 N2 H5 110.360 N6 H3 H7 111.534
N6 H3 H8 111.534 H7 H3 H8 112.019
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability