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 H2OCH3OH (water methanol dimer)

using model chemistry: PBEPBE/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 PBEPBE/6-31G*
 hartrees
Energy at 0K-191.905212
Energy at 298.15K-191.911122
Counterpoise corrected energy-191.900911
CP Energy at 298.15K-191.906409
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy81.056302
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 PBEPBE/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 3707 3654 36.50      
2 A 3634 3582 19.85      
3 A 3468 3418 259.26      
4 A 3080 3036 24.69      
5 A 3027 2984 33.35      
6 A 2959 2917 53.20      
7 A 1716 1691 48.88      
8 A 1493 1472 3.82      
9 A 1477 1456 3.22      
10 A 1446 1425 1.35      
11 A 1361 1342 26.97      
12 A 1147 1130 2.05      
13 A 1065 1050 4.85      
14 A 1018 1004 106.59      
15 A 676 666 159.28      
16 A 545 538 23.84      
17 A 295 290 231.55      
18 A 206 203 7.38      
19 A 158 156 93.70      
20 A 135 133 36.16      
21 A 115 114 26.37      

Unscaled Zero Point Vibrational Energy (zpe) 16364.0 cm-1
Scaled (by 0.9857) Zero Point Vibrational Energy (zpe) 16130.0 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 PBEPBE/6-31G*
ABC
0.79207 0.16402 0.14312

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -1.075 0.364 0.187
O2 -1.898 -0.092 -0.118
O3 0.780 0.762 0.146
H4 -2.223 -0.525 0.695
H5 0.698 1.150 -0.749
C6 1.241 -0.588 -0.034
H7 2.185 -0.627 -0.611
H8 1.436 -0.984 0.974
H9 0.472 -1.215 -0.522

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 C6 H7 H8 H9
H10.98841.89811.53762.15382.51413.49942.95722.3212
O20.98842.82320.97632.94623.17914.14683.61992.6533
O31.89812.82323.31280.97921.43802.11592.04122.1095
H41.53760.97633.31283.66363.54084.59813.69853.0366
H52.15382.94620.97923.66361.95632.32142.84102.3867
C62.51413.17911.43803.54081.95631.10641.10101.1058
H73.49944.14682.11594.59812.32141.10641.78901.8127
H82.95723.61992.04123.69852.84101.10101.78901.7948
H92.32122.65332.10953.03662.38671.10581.81271.7948

picture of water methanol dimer state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 H4 103.008 H1 O3 H5 91.189
H1 O3 C6 96.842 O2 H1 O3 154.647
O3 C6 H7 111.870 O3 C6 H8 106.259
O3 C6 H9 111.378 H5 O3 C6 106.512
H7 C6 H8 108.285 H7 C6 H9 110.053
H8 C6 H9 108.835
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.387      
2 O -0.805      
3 O -0.572      
4 H 0.370      
5 H 0.404      
6 C -0.292      
7 H 0.156      
8 H 0.178      
9 H 0.174      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.727 -0.574 0.258 1.838
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.728 0.145 -4.874
y 0.145 -18.744 -2.904
z -4.874 -2.904 -17.957
Traceless
 xyz
x -3.378 0.145 -4.874
y 0.145 1.099 -2.904
z -4.874 -2.904 2.279
Polar
3z2-r24.557
x2-y2-2.985
xy0.145
xz-4.874
yz-2.904


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.885 0.010 -0.198
y 0.010 3.102 -0.283
z -0.198 -0.283 3.170


<r2> (average value of r2) Å2
<r2> 83.054
(<r2>)1/2 9.113