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

using model chemistry: MP2/aug-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/aug-cc-pVDZ
 hartrees
Energy at 0K-112.815204
Energy at 298.15K 
HF Energy-112.412441
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy40.033630
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/aug-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 3617 3469 0.00      
2 Ag 3466 3323 0.00      
3 Ag 1659 1591 0.00      
4 Ag 1083 1039 0.00      
5 Ag 424 406 0.00      
6 Ag 138 132 0.00      
7 Au 3631 3483 9.95      
8 Au 1664 1595 19.16      
9 Au 211 202 75.90      
10 Au 52 50 23.07      
11 Bg 3631 3482 0.00      
12 Bg 1653 1585 0.00      
13 Bg 77 73 0.00      
14 Bu 3618 3470 40.64      
15 Bu 3469 3327 25.41      
16 Bu 1638 1571 17.00      
17 Bu 1055 1012 291.34      
18 Bu 99i 95i 204.12      

Unscaled Zero Point Vibrational Energy (zpe) 15492.9 cm-1
Scaled (by 0.959) Zero Point Vibrational Energy (zpe) 14857.7 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/aug-cc-pVDZ
ABC
4.54468 0.18296 0.17974

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.691 0.835 0.000
N2 0.000 1.588 0.000
N3 0.000 -1.588 0.000
H4 0.200 2.168 0.816
H5 0.200 2.168 -0.816
H6 -0.691 -0.835 0.000
H7 -0.200 -2.168 -0.816
H8 -0.200 -2.168 0.816

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.02182.52011.63781.63782.16743.23693.2369
N21.02183.17681.02031.02032.52013.84923.8492
N32.52013.17683.84923.84921.02181.02031.0203
H41.63781.02033.84921.63113.23694.65004.3545
H51.63781.02033.84921.63113.23694.35454.6500
H62.16742.52011.02183.23693.23691.63781.6378
H73.23693.84921.02034.65004.35451.63781.6311
H83.23693.84921.02034.35454.65001.63781.6311

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 106.648 H1 N2 H5 106.648
H1 H3 N6 58.418 H1 H3 H7 126.871
H1 H3 H8 126.871 N2 H1 H3 121.582
H4 N2 H5 106.132 N6 H3 H7 106.648
N6 H3 H8 106.648 H7 H3 H8 106.132
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 ()

Jump to S1C1
Energy calculated at MP2/aug-cc-pVDZ
 hartrees
Energy at 0K-112.815554
Energy at 298.15K-112.820772
HF Energy-112.412777
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy39.527679
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/aug-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' 3628 3479 8.43      
2 A' 3596 3449 68.49      
3 A' 3477 3334 4.14      
4 A' 3446 3305 71.80      
5 A' 1654 1586 10.18      
6 A' 1642 1574 11.86      
7 A' 1083 1039 94.19      
8 A' 1072 1028 159.87      
9 A' 397 381 48.12      
10 A' 148 142 26.58      
11 A' 93 89 62.34      
12 A" 3632 3483 9.31      
13 A" 3632 3483 0.22      
14 A" 1674 1605 6.20      
15 A" 1650 1582 15.29      
16 A" 249 239 41.06      
17 A" 113 108 40.81      
18 A" 46 44 9.22      

Unscaled Zero Point Vibrational Energy (zpe) 15615.4 cm-1
Scaled (by 0.959) Zero Point Vibrational Energy (zpe) 14975.2 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/aug-cc-pVDZ
ABC
3.96617 0.17303 0.17108

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.170 0.691 0.000
N2 -0.026 1.687 0.000
N3 -0.026 -1.597 0.000
H4 0.338 2.136 0.827
H5 0.338 2.136 -0.827
H6 -1.027 -1.446 0.000
H7 0.275 -2.074 -0.838
H8 0.275 -2.074 0.838

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.01502.29601.67361.67362.44982.89152.8915
N21.01503.28331.00961.00963.28913.86513.8651
N32.29603.28333.84073.84071.01161.01071.0107
H41.67361.00963.84071.65443.92214.52844.2110
H51.67361.00963.84071.65443.92214.21104.5284
H62.44983.28911.01163.92213.92211.67051.6705
H72.89153.86511.01074.52844.21101.67051.6765
H82.89153.86511.01074.21104.52841.67051.6765

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 111.521 H1 N2 H5 111.521
H1 H3 N6 86.378 H1 H3 H7 116.450
H1 H3 H8 116.450 N2 H1 H3 163.923
H4 N2 H5 110.045 N6 H3 H7 111.389
N6 H3 H8 111.389 H7 H3 H8 112.071
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability