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

using model chemistry: MP2/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at MP2/3-21G
 hartrees
Energy at 0K-190.337941
Energy at 298.15K-190.343678
HF Energy-189.998887
Counterpoise corrected energy-190.327134
CP Energy at 298.15K-190.332507
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy78.609775
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 MP2/3-21G
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' 3523 3363 1.12      
2 A' 3394 3240 445.94      
3 A' 3152 3009 63.13      
4 A' 3023 2886 60.12      
5 A' 1718 1640 57.40      
6 A' 1628 1554 1.71      
7 A' 1568 1497 1.36      
8 A' 1532 1462 66.10      
9 A' 1155 1102 26.78      
10 A' 1023 977 48.55      
11 A' 361 345 331.02      
12 A' 248 237 10.22      
13 A' 101 96 56.25      
14 A" 3671 3504 16.33      
15 A" 3055 2916 100.91      
16 A" 1608 1535 0.46      
17 A" 1190 1136 0.82      
18 A" 931 889 167.97      
19 A" 274 262 4.40      
20 A" 131 125 5.38      
21 A" 66 63 87.17      

Unscaled Zero Point Vibrational Energy (zpe) 16676.5 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 15917.8 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 MP2/3-21G
ABC
1.07826 0.13415 0.12432

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.000 0.385 0.000
O2 -0.952 0.082 0.000
O3 1.614 1.136 0.000
C4 -0.941 -1.378 0.000
H5 1.616 1.729 0.792
H6 1.616 1.729 -0.792
H7 -1.985 -1.699 0.000
H8 -0.453 -1.809 -0.888
H9 -0.453 -1.809 0.888

Atom - Atom Distances (Å)
  H1 O2 O3 C4 H5 H6 H7 H8 H9
H10.99881.78041.99802.24642.24642.87802.41002.4100
O20.99882.77411.45933.15213.15212.05872.14732.1473
O31.78042.77413.58410.98960.98964.58153.70623.7062
C41.99801.45933.58414.10104.10101.09251.10081.1008
H52.24643.15210.98964.10101.58385.03474.43004.1003
H62.24643.15210.98964.10101.58385.03474.10034.4300
H72.87802.05874.58151.09255.03475.03471.77361.7736
H82.41002.14733.70621.10084.43004.10031.77361.7755
H92.41002.14733.70621.10084.10034.43001.77361.7755

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 107.259 H1 O3 H5 104.744
H1 O3 H6 104.744 O2 H1 O3 172.752
O2 C4 H7 106.679 O2 C4 H8 113.282
O2 C4 H9 113.282 H5 O3 H6 106.297
H7 C4 H8 107.927 H7 C4 H9 107.927
H8 C4 H9 107.505
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP2/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.398      
2 O -0.723      
3 O -0.707      
4 C -0.268      
5 H 0.389      
6 H 0.389      
7 H 0.197      
8 H 0.161      
9 H 0.161      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.555 1.742 0.000 3.093
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.465 6.754 0.000
y 6.754 -10.719 0.000
z 0.000 0.000 -17.587
Traceless
 xyz
x -7.312 6.754 0.000
y 6.754 8.807 0.000
z 0.000 0.000 -1.495
Polar
3z2-r2-2.989
x2-y2-10.746
xy6.754
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.027 0.000 0.549
y 0.000 2.733 0.000
z 0.549 0.000 2.757


<r2> (average value of r2) Å2
<r2> 93.494
(<r2>)1/2 9.669