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

using model chemistry: MP2/6-31+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 MP2/6-31+G**
 hartrees
Energy at 0K-191.636790
Energy at 298.15K-191.642066
HF Energy-191.089091
Counterpoise corrected energy-191.634114
CP Energy at 298.15K-191.639100
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy78.473311
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 MP2/6-31+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' 3861 3632 6.60      
2 A' 3805 3579 376.10      
3 A' 3232 3040 36.94      
4 A' 3090 2907 71.64      
5 A' 1639 1542 93.75      
6 A' 1562 1469 3.06      
7 A' 1521 1431 10.98      
8 A' 1434 1349 33.55      
9 A' 1129 1062 16.59      
10 A' 1087 1023 105.48      
11 A' 261 245 251.21      
12 A' 178 167 18.94      
13 A' 74 69 29.73      
14 A" 4000 3763 95.42      
15 A" 3163 2976 62.62      
16 A" 1548 1456 1.28      
17 A" 1199 1128 0.78      
18 A" 719 676 179.84      
19 A" 214 201 4.30      
20 A" 95 90 28.57      
21 A" 80 75 27.46      

Unscaled Zero Point Vibrational Energy (zpe) 16944.9 cm-1
Scaled (by 0.9406) Zero Point Vibrational Energy (zpe) 15938.3 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 MP2/6-31+G**
ABC
1.05060 0.12808 0.11863

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.000 0.444 0.000
O2 -0.968 0.396 0.000
O3 1.939 0.542 0.000
C4 -1.346 -0.976 0.000
H5 2.352 0.953 0.769
H6 2.352 0.953 -0.769
H7 -2.432 -1.003 0.000
H8 -0.983 -1.498 -0.889
H9 -0.983 -1.498 0.889

Atom - Atom Distances (Å)
  H1 O2 O3 C4 H5 H6 H7 H8 H9
H10.96951.94171.95622.52642.52642.83002.35082.3508
O20.96952.91121.42343.45343.45342.02532.09292.0929
O31.94172.91123.61880.96430.96434.63653.67273.6727
C41.95621.42343.61884.24094.24091.08691.09291.0929
H52.52643.45340.96434.24091.53725.22564.45804.1403
H62.52643.45340.96434.24091.53725.22564.14034.4580
H72.83002.02534.63651.08695.22565.22561.77111.7711
H82.35082.09293.67271.09294.45804.14031.77111.7772
H92.35082.09293.67271.09294.14034.45801.77111.7772

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 108.172 H1 O3 H5 116.696
H1 O3 H6 116.696 O2 H1 O3 179.895
O2 C4 H7 106.800 O2 C4 H8 111.880
O2 C4 H9 111.880 H5 O3 H6 105.698
H7 C4 H8 108.690 H7 C4 H9 108.690
H8 C4 H9 108.795
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP2/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.445      
2 O -0.663      
3 O -0.788      
4 C -0.084      
5 H 0.386      
6 H 0.386      
7 H 0.120      
8 H 0.099      
9 H 0.099      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  3.366 0.101 0.000 3.367
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -13.934 7.969 0.000
y 7.969 -18.554 0.000
z 0.000 0.000 -18.050
Traceless
 xyz
x 4.368 7.969 0.000
y 7.969 -2.562 0.000
z 0.000 0.000 -1.806
Polar
3z2-r2-3.613
x2-y24.620
xy7.969
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.052 0.000 0.282
y 0.000 3.552 0.000
z 0.282 0.000 3.770


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