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All results from a given calculation for CH3OHH2O (methanol water dimer)

using model chemistry: PBEPBE/3-21G

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/3-21G
 hartrees
Energy at 0K-190.841837
Energy at 298.15K-190.847573
Counterpoise corrected energy-190.829449
CP Energy at 298.15K-190.835033
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy79.201399
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/3-21G
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 3475 3443 8.88      
2 A 3340 3309 1.26      
3 A 3034 3007 235.40      
4 A 2996 2969 444.01      
5 A 2869 2843 137.37      
6 A 2852 2826 130.56      
7 A 1652 1637 36.91      
8 A 1553 1539 1.48      
9 A 1515 1502 0.79      
10 A 1508 1494 19.35      
11 A 1482 1468 44.92      
12 A 1133 1122 0.07      
13 A 1114 1104 19.76      
14 A 1012 1003 121.78      
15 A 1011 1002 57.74      
16 A 407 404 337.37      
17 A 283 281 27.82      
18 A 281 279 2.95      
19 A 135 134 15.28      
20 A 103 102 53.82      
21 A 11 11 63.11      

Unscaled Zero Point Vibrational Energy (zpe) 15883.4 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 15738.8 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/3-21G
ABC
1.10455 0.13972 0.12953

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/3-21G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -0.312 0.211 -0.000
O2 0.599 0.687 0.000
O3 -1.920 -0.273 -0.000
C4 1.604 -0.355 -0.000
H5 -2.244 0.256 -0.794
H6 -2.243 0.254 0.795
H7 2.589 0.146 0.001
H8 1.578 -1.023 0.894
H9 1.579 -1.022 -0.895

Atom - Atom Distances (Å)
  H1 O2 O3 C4 H5 H6 H7 H8 H9
H11.02781.67921.99872.08902.08872.90172.42842.4284
O21.02782.69561.44852.98302.98242.06232.16392.1639
O31.67922.69563.52571.00721.00724.52843.68813.6887
C41.99871.44853.52573.97713.97581.10451.11621.1162
H52.08902.98301.00723.97711.58894.89914.37004.0325
H62.08872.98241.00723.97581.58894.89784.03014.3694
H72.90172.06234.52841.10454.89914.89781.78481.7848
H82.42842.16393.68811.11624.37004.03011.78481.7891
H92.42842.16393.68871.11624.03254.36941.78481.7891

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 106.391 H1 O3 H5 99.013
H1 O3 H6 98.988 O2 H1 O3 169.161
O2 C4 H7 106.983 O2 C4 H8 114.453
O2 C4 H9 114.453 H5 O3 H6 104.147
H7 C4 H8 106.972 H7 C4 H9 106.972
H8 C4 H9 106.539
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.310      
2 O -0.579      
3 O -0.573      
4 C -0.372      
5 H 0.352      
6 H 0.352      
7 H 0.197      
8 H 0.156      
9 H 0.156      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -3.158 0.105 0.003 3.160
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.902 -5.348 -0.005
y -5.348 -21.920 -0.004
z -0.005 -0.004 -17.873
Traceless
 xyz
x 7.994 -5.348 -0.005
y -5.348 -7.033 -0.004
z -0.005 -0.004 -0.962
Polar
3z2-r2-1.923
x2-y210.018
xy-5.348
xz-0.005
yz-0.004


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.849 -0.404 0.000
y -0.404 2.726 -0.000
z 0.000 -0.000 2.915


<r2> (average value of r2) Å2
<r2> 90.705
(<r2>)1/2 9.524