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

using model chemistry: B1B95/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at B1B95/3-21G
 hartrees
Energy at 0K-190.984503
Energy at 298.15K-190.990279
Nuclear repulsion energy79.538224
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 B1B95/3-21G
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' 3515 3363 0.05      
2 A' 3263 3121 565.03      
3 A' 3111 2977 92.30      
4 A' 2970 2841 86.78      
5 A' 1680 1607 49.56      
6 A' 1591 1522 1.69      
7 A' 1539 1472 2.43      
8 A' 1509 1444 66.94      
9 A' 1141 1092 23.54      
10 A' 1049 1004 62.53      
11 A' 369 353 334.32      
12 A' 264 252 7.21      
13 A' 103 98 61.85      
14 A" 3654 3496 19.22      
15 A" 2997 2867 117.45      
16 A" 1565 1497 1.25      
17 A" 1167 1116 0.09      
18 A" 979 936 158.34      
19 A" 276 264 10.49      
20 A" 136 130 7.10      
21 A" 61 59 82.92      

Unscaled Zero Point Vibrational Energy (zpe) 16468.9 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 15755.8 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 B1B95/3-21G
ABC
1.12672 0.13858 0.12876

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.000 0.380 0.000
O2 -0.920 -0.026 0.000
O3 1.442 1.297 0.000
C4 -0.769 -1.456 0.000
H5 1.347 1.885 0.791
H6 1.347 1.885 -0.791
H7 -1.774 -1.884 0.000
H8 -0.244 -1.848 -0.886
H9 -0.244 -1.848 0.886

Atom - Atom Distances (Å)
  H1 O2 O3 C4 H5 H6 H7 H8 H9
H11.00591.70901.99032.16882.16882.87672.41102.4110
O21.00592.70771.43713.06883.06882.04482.13602.1360
O31.70902.70773.53050.99010.99014.52383.67753.6775
C41.99031.43713.53054.03234.03231.09291.10241.1024
H52.16883.06880.99014.03231.58224.95704.39124.0593
H62.16883.06880.99014.03231.58224.95704.05934.3912
H72.87672.04484.52381.09294.95704.95701.76831.7683
H82.41102.13603.67751.10244.39124.05931.76831.7729
H92.41102.13603.67751.10244.05934.39121.76831.7729

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 107.807 H1 O3 H5 103.719
H1 O3 H6 103.719 O2 H1 O3 171.415
O2 C4 H7 107.056 O2 C4 H8 113.863
O2 C4 H9 113.863 H5 O3 H6 106.067
H7 C4 H8 107.322 H7 C4 H9 107.322
H8 C4 H9 107.053
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.344      
2 O -0.628      
3 O -0.625      
4 C -0.350      
5 H 0.367      
6 H 0.367      
7 H 0.201      
8 H 0.162      
9 H 0.162      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.252 2.393 0.000 3.287
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.320 4.854 0.000
y 4.854 -10.051 0.000
z 0.000 0.000 -17.562
Traceless
 xyz
x -8.513 4.854 0.000
y 4.854 9.890 0.000
z 0.000 0.000 -1.376
Polar
3z2-r2-2.752
x2-y2-12.269
xy4.854
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.602 0.464 0.000
y 0.464 3.452 0.000
z 0.000 0.000 2.799


<r2> (average value of r2) Å2
<r2> 90.880
(<r2>)1/2 9.533