return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for H2ONH3 (Water Ammonia Dimer)

using model chemistry: HF/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at HF/6-31G*
 hartrees
Energy at 0K-132.205556
Energy at 298.15K-132.209799
HF Energy-132.205556
Counterpoise corrected energy-132.204433
CP Energy at 298.15K-132.208726
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy38.536951
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 HF/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' 4150 3729 82.53      
2 A' 3967 3565 316.16      
3 A' 3824 3436 5.14      
4 A' 3692 3317 3.59      
5 A' 1868 1678 94.50      
6 A' 1847 1659 34.05      
7 A' 1253 1126 204.87      
8 A' 425 382 124.70      
9 A' 185 166 19.89      
10 A' 161 145 46.15      
11 A" 3824 3436 6.11      
12 A" 1844 1656 25.10      
13 A" 673 605 246.16      
14 A" 158 142 42.18      
15 A" 19 17 85.49      

Unscaled Zero Point Vibrational Energy (zpe) 13944.7 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 12529.3 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 HF/6-31G*
ABC
5.02617 0.19834 0.19665

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.006 0.653 0.000
O2 -0.035 1.607 0.000
N3 -0.035 -1.432 0.000
H4 0.866 1.896 0.000
H5 0.799 -1.989 0.000
H6 -0.570 -1.694 0.807
H7 -0.570 -1.694 -0.807

Atom - Atom Distances (Å)
  H1 O2 N3 H4 H5 H6 H7
H10.95532.08531.51212.75842.54782.5478
O20.95533.03930.94653.69183.44043.4404
N32.08533.03933.44841.00291.00291.0029
H41.51210.94653.44843.88633.95043.9504
H52.75843.69181.00293.88631.61581.6158
H62.54783.44041.00293.95041.61581.6146
H72.54783.44041.00293.95041.61581.6146

picture of Water Ammonia Dimer state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 H4 105.325 H1 N3 H5 122.614
H1 N3 H6 105.770 H1 N3 H7 105.770
O2 H1 N3 176.400 H5 N3 H6 107.326
H5 N3 H7 107.326 H6 N3 H7 107.208
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.495      
2 O -0.934      
3 N -1.029      
4 H 0.416      
5 H 0.348      
6 H 0.352      
7 H 0.352      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.332 -3.765 0.000 3.993
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.287 3.728 -0.018
y 3.728 -11.965 -0.035
z -0.018 -0.035 -13.196
Traceless
 xyz
x 1.293 3.728 -0.018
y 3.728 0.277 -0.035
z -0.018 -0.035 -1.570
Polar
3z2-r2-3.140
x2-y20.678
xy3.728
xz-0.018
yz-0.035


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.064 0.076 -0.004
y 0.076 2.233 -0.001
z -0.004 -0.001 1.685


<r2> (average value of r2) Å2
<r2> 59.689
(<r2>)1/2 7.726