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

using model chemistry: CCD/6-31G*

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 CCD/6-31G*
 hartrees
Energy at 0K-112.744520
Energy at 298.15K-112.749948
HF Energy-112.372214
Counterpoise corrected energy-112.744427
CP Energy at 298.15K-112.749729
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy40.141674
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 CCD/6-31G*
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 3612 3419 0.00      
2 Ag 3470 3285 0.00      
3 Ag 1760 1666 0.00      
4 Ag 1217 1152 0.00      
5 Ag 474 449 0.00      
6 Ag 148 140 0.00      
7 Au 3611 3418 0.07      
8 Au 1775 1680 36.36      
9 Au 252 238 133.42      
10 Au 99 93 30.57      
11 Bg 3611 3418 0.00      
12 Bg 1762 1668 0.00      
13 Bg 131 124 0.00      
14 Bu 3612 3419 13.88      
15 Bu 3473 3287 12.70      
16 Bu 1738 1645 23.04      
17 Bu 1192 1129 381.36      
18 Bu 93 88 308.68      

Unscaled Zero Point Vibrational Energy (zpe) 16014.8 cm-1
Scaled (by 0.9465) Zero Point Vibrational Energy (zpe) 15158.0 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 CCD/6-31G*
ABC
4.59746 0.18412 0.18080

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.640 0.776 0.000
N2 0.000 1.563 0.000
N3 0.000 -1.563 0.000
H4 0.173 2.129 0.820
H5 0.173 2.129 -0.820
H6 -0.640 -0.776 0.000
H7 -0.173 -2.129 -0.820
H8 -0.173 -2.129 0.820

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.01472.42451.64981.64982.01143.12573.1257
N21.01473.12571.01161.01162.42453.78563.7856
N32.42453.12573.78563.78561.01471.01161.0116
H41.64981.01163.78561.64093.12574.57594.2715
H51.64981.01163.78561.64093.12574.27154.5759
H62.01142.42451.01473.12573.12571.64981.6498
H73.12573.78561.01164.57594.27151.64981.6409
H83.12573.78561.01164.27154.57591.64981.6409

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 109.014 H1 N2 H5 109.014
H1 H3 N6 54.429 H1 H3 H7 125.786
H1 H3 H8 125.786 N2 H1 H3 125.571
H4 N2 H5 108.391 N6 H3 H7 109.014
N6 H3 H8 109.014 H7 H3 H8 108.391
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 ()

Jump to S1C1
Energy calculated at CCD/6-31G*
 hartrees
Energy at 0K-112.744427
Energy at 298.15K-112.749729
HF Energy-112.372202
Counterpoise corrected energy-112.744427
CP Energy at 298.15K-112.749729
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy40.008258
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 CCD/6-31G*
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' 3613 3420 2.22      
2 A' 3608 3415 19.72      
3 A' 3473 3287 4.01      
4 A' 3467 3282 15.67      
5 A' 1761 1666 1.53      
6 A' 1740 1646 22.73      
7 A' 1220 1154 29.02      
8 A' 1195 1131 339.82      
9 A' 456 431 12.22      
10 A' 154 146 34.83      
11 A' 34 32 241.89      
12 A" 3611 3418 0.03      
13 A" 3608 3415 0.47      
14 A" 1780 1685 27.57      
15 A" 1758 1664 9.15      
16 A" 256 242 116.20      
17 A" 131 124 38.22      
18 A" 88 83 8.77      

Unscaled Zero Point Vibrational Energy (zpe) 15975.5 cm-1
Scaled (by 0.9465) Zero Point Vibrational Energy (zpe) 15120.9 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 CCD/6-31G*
ABC
4.49291 0.18137 0.17832

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.474 0.724 0.000
N2 -0.009 1.623 0.000
N3 -0.009 -1.573 0.000
H4 0.332 2.134 0.814
H5 0.332 2.134 -0.814
H6 -0.841 -0.983 0.000
H7 -0.088 -2.181 -0.815
H8 -0.088 -2.181 0.815

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.02052.34661.63441.63442.15443.06843.0684
N21.02053.19531.01951.01952.73513.89043.8904
N32.34663.19533.81023.81021.01981.01971.0197
H41.63441.01953.81021.62713.42814.63084.3351
H51.63441.01953.81021.62713.42814.33514.6308
H62.15442.73511.01983.42813.42811.63261.6326
H73.06843.89041.01974.63084.33511.63261.6294
H83.06843.89041.01974.33514.63081.63261.6294

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 106.479 H1 N2 H5 106.479
H1 H3 N6 66.546 H1 H3 H7 126.835
H1 H3 H8 126.835 N2 H1 H3 139.874
H4 N2 H5 105.872 N6 H3 H7 106.352
N6 H3 H8 106.352 H7 H3 H8 106.069
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability