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

using model chemistry: HF/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 HF/3-21G
 hartrees
Energy at 0K-190.001650
Energy at 298.15K-190.007279
Counterpoise corrected energy-189.994587
CP Energy at 298.15K-190.000047
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy79.411460
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/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' 3836 3474 4.09      
2 A' 3729 3377 485.05      
3 A' 3265 2957 66.55      
4 A' 3157 2859 57.36      
5 A' 1791 1622 88.14      
6 A' 1704 1543 1.45      
7 A' 1645 1489 4.40      
8 A' 1579 1430 78.31      
9 A' 1211 1096 32.59      
10 A' 1117 1011 68.94      
11 A' 312 283 336.28      
12 A' 230 208 24.90      
13 A' 90 81 70.73      
14 A" 3965 3591 48.50      
15 A" 3184 2884 111.15      
16 A" 1689 1529 0.89      
17 A" 1259 1140 1.66      
18 A" 903 818 228.73      
19 A" 248 225 0.23      
20 A" 118 107 0.17      
21 A" 78 71 84.02      

Unscaled Zero Point Vibrational Energy (zpe) 17554.6 cm-1
Scaled (by 0.9056) Zero Point Vibrational Energy (zpe) 15897.4 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/3-21G
ABC
1.12248 0.13411 0.12477

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.000 0.415 0.000
O2 -0.944 0.177 0.000
O3 1.719 0.948 0.000
C4 -1.098 -1.246 0.000
H5 1.933 1.467 0.786
H6 1.933 1.467 -0.786
H7 -2.158 -1.453 0.000
H8 -0.662 -1.713 -0.879
H9 -0.662 -1.713 0.879

Atom - Atom Distances (Å)
  H1 O2 O3 C4 H5 H6 H7 H8 H9
H10.97331.79991.99082.33722.33722.85452.39612.3961
O20.97332.77221.43153.24943.24942.03322.10442.1044
O31.79992.77223.57050.96630.96634.56083.67763.6776
C41.99081.43153.57054.14314.14311.08061.08731.0873
H52.33723.24940.96634.14311.57295.08794.42984.1058
H62.33723.24940.96634.14311.57295.08794.10584.4298
H72.85452.03324.56081.08065.08795.08791.75541.7554
H82.39612.10443.67761.08734.42984.10581.75541.7585
H92.39612.10443.67761.08734.10584.42981.75541.7585

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 110.306 H1 O3 H5 111.749
H1 O3 H6 111.749 O2 H1 O3 176.903
O2 C4 H7 107.243 O2 C4 H8 112.614
O2 C4 H9 112.614 H5 O3 H6 108.945
H7 C4 H8 108.135 H7 C4 H9 108.135
H8 C4 H9 107.926
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.405      
2 O -0.740      
3 O -0.723      
4 C -0.249      
5 H 0.395      
6 H 0.395      
7 H 0.197      
8 H 0.160      
9 H 0.160      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  3.323 1.322 0.000 3.577
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.439 8.249 0.000
y 8.249 -13.107 0.000
z 0.000 0.000 -17.443
Traceless
 xyz
x -2.164 8.249 0.000
y 8.249 4.334 0.000
z 0.000 0.000 -2.170
Polar
3z2-r2-4.341
x2-y2-4.332
xy8.249
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.626 0.544 0.000
y 0.544 2.732 0.000
z 0.000 0.000 2.657


<r2> (average value of r2) Å2
<r2> 92.998
(<r2>)1/2 9.644