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

using model chemistry: MP2/aug-cc-pVQZ

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-pVQZ
 hartrees
Energy at 0K-112.960644
Energy at 298.15K 
HF Energy-112.450397
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy40.323256
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-pVQZ
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 3640 3457 0.00      
2 Ag 3495 3319 0.00      
3 Ag 1678 1593 0.00      
4 Ag 1076 1022 0.00      
5 Ag 432 410 0.00      
6 Ag 136 129 0.00      
7 Au 3657 3473 17.96      
8 Au 1685 1600 21.10      
9 Au 214 203 76.74      
10 Au 79 75 21.46      
11 Bg 3657 3473 0.00      
12 Bg 1674 1590 0.00      
13 Bg 101 96 0.00      
14 Bu 3640 3457 55.91      
15 Bu 3500 3324 23.26      
16 Bu 1658 1575 19.13      
17 Bu 1047 994 310.86      
18 Bu 36i 35i 201.60      

Unscaled Zero Point Vibrational Energy (zpe) 15665.9 cm-1
Scaled (by 0.9497) Zero Point Vibrational Energy (zpe) 14877.9 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/aug-cc-pVQZ
ABC
4.63025 0.18455 0.18127

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.682 0.834 0.000
N2 0.000 1.582 0.000
N3 0.000 -1.582 0.000
H4 0.186 2.156 0.811
H5 0.186 2.156 -0.811
H6 -0.682 -0.834 0.000
H7 -0.186 -2.156 -0.811
H8 -0.186 -2.156 0.811

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.01242.51121.62821.62822.15593.21803.2180
N21.01243.16461.01051.01052.51123.83003.8300
N32.51123.16463.83003.83001.01241.01051.0105
H41.62821.01053.83001.62103.21804.62234.3287
H51.62821.01053.83001.62103.21804.32874.6223
H62.15592.51121.01243.21803.21801.62821.6282
H73.21803.83001.01054.62234.32871.62821.6210
H83.21803.83001.01054.32874.62231.62821.6210

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 107.200 H1 N2 H5 107.200
H1 H3 N6 58.150 H1 H3 H7 126.636
H1 H3 H8 126.636 N2 H1 H3 121.850
H4 N2 H5 106.668 N6 H3 H7 107.200
N6 H3 H8 107.200 H7 H3 H8 106.668
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 ()

Jump to S1C1
Energy calculated at MP2/aug-cc-pVQZ
 hartrees
Energy at 0K-112.960681
Energy at 298.15K-112.965792
HF Energy-112.450519
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy40.022623
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-pVQZ
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' 3652 3468 14.09      
2 A' 3621 3439 64.16      
3 A' 3507 3330 3.65      
4 A' 3477 3302 62.03      
5 A' 1676 1591 6.80      
6 A' 1661 1578 15.86      
7 A' 1071 1017 40.57      
8 A' 1055 1002 243.69      
9 A' 399 379 30.53      
10 A' 141 134 20.13      
11 A' 52 50 110.50      
12 A" 3658 3474 5.85      
13 A" 3658 3474 11.89      
14 A" 1692 1607 10.43      
15 A" 1672 1587 12.01      
16 A" 238 226 47.69      
17 A" 105 100 45.52      
18 A" 53 50 0.88      

Unscaled Zero Point Vibrational Energy (zpe) 15693.7 cm-1
Scaled (by 0.9497) Zero Point Vibrational Energy (zpe) 14904.3 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/aug-cc-pVQZ
ABC
4.25758 0.17865 0.17615

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.170 0.693 0.000
N2 -0.026 1.680 0.000
N3 -0.026 -1.591 0.000
H4 0.332 2.126 0.821
H5 0.332 2.126 -0.821
H6 -1.017 -1.440 0.000
H7 0.273 -2.064 -0.831
H8 0.273 -2.064 0.831

Atom - Atom Distances (Å)
  H1 N2 N3 H4 H5 H6 H7 H8
H11.00632.29241.65981.65982.44122.88102.8810
N21.00633.27111.00051.00053.27403.84653.8465
N32.29243.27113.82393.82391.00281.00191.0019
H41.65981.00053.82391.64123.90094.50434.1905
H51.65981.00053.82391.64123.90094.19054.5043
H62.44123.27401.00283.90093.90091.65691.6569
H72.88103.84651.00194.50434.19051.65691.6626
H82.88103.84651.00194.19054.50431.65691.6626

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 111.602 H1 N2 H5 111.602
H1 H3 N6 86.243 H1 H3 H7 116.385
H1 H3 H8 116.385 N2 H1 H3 163.902
H4 N2 H5 110.204 N6 H3 H7 111.484
N6 H3 H8 111.484 H7 H3 H8 112.132
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability