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: CCSD(T)_cp_opt/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at CCSD(T)_cp_opt/6-31+G**
 hartrees
Energy at 0K-132.664478
Energy at 298.15K-132.668711
Nuclear repulsion energy11.920111
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 CCSD(T)_cp_opt/6-31+G**
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' 3950 3791        
2 A' 3735 3584        
3 A' 3674 3525        
4 A' 3523 3381        
5 A' 1706 1638        
6 A' 1679 1612        
7 A' 1141 1095        
8 A' 417 400        
9 A' 184 176        
10 A' 144 139        
11 A" 3671 3523        
12 A" 1704 1635        
13 A" 662 635        
14 A" 168 161        
15 A" 30 28        

Unscaled Zero Point Vibrational Energy (zpe) 13194.1 cm-1
Scaled (by 0.9596) Zero Point Vibrational Energy (zpe) 12661.1 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 CCSD(T)_cp_opt/6-31+G**
ABC
5.00179 0.19659 0.19505

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)_cp_opt/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.089 0.642 0.000
O2 -0.035 1.606 0.000
N3 -0.035 -1.441 0.000
H4 0.850 1.983 0.000
H5 0.770 -2.058 0.000
H6 -0.592 -1.667 0.818
H7 -0.592 -1.667 -0.818

Atom - Atom Distances (Å)
  H1 O2 N3 H4 H5 H6 H7
H10.97202.08641.54192.78452.54232.5423
O20.97203.04670.96243.75143.41913.4191
N32.08643.04673.53641.01461.01501.0150
H41.54190.96243.53644.04174.00884.0088
H52.78453.75141.01464.04171.63651.6365
H62.54233.41911.01504.00881.63651.6354
H72.54233.41911.01504.00881.63651.6354

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 105.712 H1 N3 H5 124.050
H1 N3 H6 104.773 H1 N3 H7 104.773
O2 H1 N3 169.233 H5 N3 H6 107.477
H5 N3 H7 107.477 H6 N3 H7 107.337
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability