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

using model chemistry: MP2/cc-pVDZ

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-pVDZ
 hartrees
Energy at 0K-112.772693
Energy at 298.15K-112.778182
HF Energy-112.394778
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy40.309457
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-pVDZ
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 3624 3451 0.00      
2 Ag 3478 3313 0.00      
3 Ag 1693 1612 0.00      
4 Ag 1181 1125 0.00      
5 Ag 443 422 0.00      
6 Ag 154 147 0.00      
7 Au 3630 3458 0.11      
8 Au 1706 1625 17.10      
9 Au 244 233 99.31      
10 Au 107 101 26.67      
11 Bg 3630 3458 0.00      
12 Bg 1699 1618 0.00      
13 Bg 153 146 0.00      
14 Bu 3622 3450 19.35      
15 Bu 3483 3317 16.23      
16 Bu 1667 1587 7.88      
17 Bu 1163 1108 256.96      
18 Bu 108 103 278.46      

Unscaled Zero Point Vibrational Energy (zpe) 15891.8 cm-1
Scaled (by 0.9525) Zero Point Vibrational Energy (zpe) 15136.9 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/cc-pVDZ
ABC
4.56976 0.18908 0.18581

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.670 0.788 0.000
N2 0.000 1.563 0.000
N3 0.000 -1.563 0.000
H4 0.266 2.132 0.807
H5 0.266 2.132 -0.807
H6 -0.670 -0.788 0.000
H7 -0.266 -2.132 -0.807
H8 -0.266 -2.132 0.807

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.02462.44391.61981.61982.06823.17073.1707
N21.02463.12531.02321.02322.44393.79153.7915
N32.44393.12533.79153.79151.02461.02321.0232
H41.61981.02323.79151.61493.17074.59104.2976
H51.61981.02323.79151.61493.17074.29764.5910
H62.06822.44391.02463.17073.17071.61981.6198
H73.17073.79151.02324.59104.29761.61981.6149
H83.17073.79151.02324.29764.59101.61981.6149

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 104.557 H1 N2 H5 104.557
H1 H3 N6 56.762 H1 H3 H7 127.341
H1 H3 H8 127.341 N2 H1 H3 123.238
H4 N2 H5 104.202 N6 H3 H7 104.557
N6 H3 H8 104.557 H7 H3 H8 104.202
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 ()

Jump to S1C1
Energy calculated at MP2/cc-pVDZ
 hartrees
Energy at 0K-112.772693
Energy at 298.15K-112.778183
HF Energy-112.394771
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy40.306996
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-pVDZ
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' 3623 3451 0.18      
2 A' 3622 3450 19.07      
3 A' 3483 3317 16.19      
4 A' 3478 3313 0.01      
5 A' 1693 1612 0.00      
6 A' 1667 1587 7.88      
7 A' 1181 1125 0.00      
8 A' 1163 1108 256.66      
9 A' 443 422 0.00      
10 A' 154 147 0.01      
11 A' 108 103 278.48      
12 A" 3630 3458 0.09      
13 A" 3630 3457 0.02      
14 A" 1707 1625 17.09      
15 A" 1699 1618 0.00      
16 A" 245 233 99.59      
17 A" 153 146 0.00      
18 A" 107 102 26.45      

Unscaled Zero Point Vibrational Energy (zpe) 15891.9 cm-1
Scaled (by 0.9525) Zero Point Vibrational Energy (zpe) 15137.1 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/cc-pVDZ
ABC
4.56873 0.18904 0.18578

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.167 0.690 0.000
N2 -0.029 1.685 0.000
N3 -0.029 -1.589 0.000
H4 0.372 2.118 0.820
H5 0.372 2.118 -0.820
H6 -1.030 -1.442 0.000
H7 0.262 -2.077 -0.838
H8 0.262 -2.077 0.838

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.01472.28761.65911.65912.44522.89212.8921
N21.01473.27491.00941.00943.28413.86533.8653
N32.28763.27493.81763.81761.01241.01181.0118
H41.65911.00943.81761.63943.91274.51124.1958
H51.65911.00943.81761.63943.91274.19584.5112
H62.44523.28411.01243.91273.91271.66591.6659
H72.89213.86531.01184.51124.19581.66591.6751
H82.89213.86531.01184.19584.51121.66591.6751

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 110.094 H1 N2 H5 110.094
H1 H3 N6 86.545 H1 H3 H7 117.084
H1 H3 H8 117.084 N2 H1 H3 163.972
H4 N2 H5 108.588 N6 H3 H7 110.771
N6 H3 H8 110.771 H7 H3 H8 111.748
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability