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

using model chemistry: MP2/6-311+G(3df,2pd)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at MP2/6-311+G(3df,2pd)
 hartrees
Energy at 0K-191.852611
Energy at 298.15K-191.857735
HF Energy-191.153589
Counterpoise corrected energy-191.851518
CP Energy at 298.15K-191.856535
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy78.771818
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 MP2/6-311+G(3df,2pd)
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' 3862 3669 9.29      
2 A' 3790 3601 421.71      
3 A' 3171 3012 29.98      
4 A' 3042 2890 65.40      
5 A' 1632 1551 72.43      
6 A' 1536 1459 3.69      
7 A' 1494 1419 4.45      
8 A' 1431 1359 30.22      
9 A' 1128 1071 4.51      
10 A' 1093 1038 104.12      
11 A' 227 216 189.61      
12 A' 167 158 14.60      
13 A' 66 63 37.81      
14 A" 3975 3776 100.09      
15 A" 3109 2954 49.39      
16 A" 1523 1447 2.59      
17 A" 1193 1133 0.62      
18 A" 692 657 116.39      
19 A" 189 179 1.40      
20 A" 88 84 12.22      
21 A" 71 68 43.89      

Unscaled Zero Point Vibrational Energy (zpe) 16738.8 cm-1
Scaled (by 0.95) Zero Point Vibrational Energy (zpe) 15901.8 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 MP2/6-311+G(3df,2pd)
ABC
1.08362 0.12795 0.11887

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311+G(3df,2pd)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.000 0.407 0.000
O2 -0.963 0.351 0.000
O3 1.929 0.605 0.000
C4 -1.321 -1.016 0.000
H5 2.255 1.092 0.759
H6 2.255 1.092 -0.759
H7 -2.406 -1.066 0.000
H8 -0.953 -1.537 -0.887
H9 -0.953 -1.537 0.887

Atom - Atom Distances (Å)
  H1 O2 O3 C4 H5 H6 H7 H8 H9
H10.96451.93871.94152.47652.47652.82082.33932.3393
O20.96452.90261.41333.38873.38872.02222.08582.0858
O31.93872.90263.63120.95950.95954.64523.69813.6981
C41.94151.41333.63124.22034.22031.08631.09201.0920
H52.47653.38870.95954.22031.51815.19244.46254.1500
H62.47653.38870.95954.22031.51815.19244.15004.4625
H72.82082.02224.64521.08635.19245.19241.76621.7662
H82.33932.08583.69811.09204.46254.15001.76621.7732
H92.33932.08583.69811.09204.15004.46251.76621.7732

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 107.980 H1 O3 H5 112.998
H1 O3 H6 112.998 O2 H1 O3 177.456
O2 C4 H7 107.276 O2 C4 H8 112.086
O2 C4 H9 112.086 H5 O3 H6 104.567
H7 C4 H8 108.345 H7 C4 H9 108.345
H8 C4 H9 108.569
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP2/6-311+G(3df,2pd) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.264      
2 O -0.674      
3 O -0.288      
4 C 0.412      
5 H 0.136      
6 H 0.136      
7 H 0.005      
8 H 0.005      
9 H 0.005      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.890 0.471 0.000 2.928
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.743 7.485 0.000
y 7.485 -17.682 0.000
z 0.000 0.000 -17.974
Traceless
 xyz
x 2.085 7.485 0.000
y 7.485 -0.824 0.000
z 0.000 0.000 -1.261
Polar
3z2-r2-2.522
x2-y21.939
xy7.485
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.629 0.000 0.371
y 0.000 4.019 0.000
z 0.371 0.000 4.390


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