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 CH3OHH2O (methanol water dimer)

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/6-31G*
 hartrees
Energy at 0K-191.905706
Energy at 298.15K-191.911231
Counterpoise corrected energy-191.902133
CP Energy at 298.15K-191.907550
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy79.500393
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 PBEPBEultrafine/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 3719 3658 42.13      
2 A 3600 3540 11.35      
3 A 3477 3419 263.04      
4 A 3051 3000 45.12      
5 A 2954 2905 84.75      
6 A 2912 2864 83.36      
7 A 1686 1658 71.11      
8 A 1498 1474 1.81      
9 A 1475 1451 1.19      
10 A 1462 1438 7.10      
11 A 1422 1398 44.68      
12 A 1148 1130 0.22      
13 A 1103 1085 6.99      
14 A 1063 1046 98.13      
15 A 826 812 63.52      
16 A 368 362 379.41      
17 A 236 232 48.26      
18 A 204 201 29.04      
19 A 166 163 88.37      
20 A 69 67 44.32      
21 A 46 45 67.08      

Unscaled Zero Point Vibrational Energy (zpe) 16241.9 cm-1
Scaled (by 0.9835) Zero Point Vibrational Energy (zpe) 15973.9 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 PBEPBEultrafine/6-31G*
ABC
1.24361 0.13256 0.12439

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -0.187 -0.229 0.415
O2 0.595 -0.631 -0.032
O3 -2.020 0.261 0.038
C4 1.643 0.328 0.011
H5 -2.498 -0.559 0.277
H6 -1.630 0.039 -0.834
H7 2.491 -0.091 -0.556
H8 1.368 1.298 -0.456
H9 1.996 0.536 1.044

Atom - Atom Distances (Å)
  H1 O2 O3 C4 H5 H6 H7 H8 H9
H10.98691.93381.95512.33801.92652.85252.34672.3971
O20.98692.76391.42073.10952.45812.03992.12032.1166
O31.93382.76393.66350.97850.98064.56373.57714.1488
C41.95511.42073.66354.24303.39251.10281.11121.1109
H52.33803.10950.97854.24301.53145.07994.35064.6880
H61.92652.45810.98063.39251.53144.13273.27344.1131
H72.85252.03994.56371.10285.07994.13271.78881.7878
H82.34672.12033.57711.11124.35063.27341.78881.7955
H92.39712.11664.14881.11094.68804.11311.78781.7955

picture of methanol water dimer state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 C4 107.224 H1 O3 H5 101.721
H1 O3 H6 74.870 O2 H1 O3 140.032
O2 C4 H7 107.203 O2 C4 H8 113.183
O2 C4 H9 112.890 H5 O3 H6 102.824
H7 C4 H8 107.795 H7 C4 H9 107.724
H8 C4 H9 107.802
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.388      
2 O -0.615      
3 O -0.741      
4 C -0.262      
5 H 0.397      
6 H 0.396      
7 H 0.163      
8 H 0.135      
9 H 0.139      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.011 -0.230 -0.360 1.097
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.199 5.393 0.724
y 5.393 -21.152 -0.563
z 0.724 -0.563 -18.604
Traceless
 xyz
x 3.679 5.393 0.724
y 5.393 -3.751 -0.563
z 0.724 -0.563 0.072
Polar
3z2-r20.144
x2-y24.953
xy5.393
xz0.724
yz-0.563


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.288 0.243 -0.078
y 0.243 3.097 0.002
z -0.078 0.002 3.086


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000