return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for H2OCH3OH (water methanol 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-191.637839
Energy at 298.15K-191.643437
HF Energy-191.089490
Counterpoise corrected energy-191.635212
CP Energy at 298.15K-191.640559
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy79.316325
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 3971 3735 120.90      
2 A 3891 3660 48.00      
3 A 3742 3520 357.75      
4 A 3263 3069 15.15      
5 A 3209 3019 34.93      
6 A 3121 2935 48.82      
7 A 1658 1559 62.87      
8 A 1560 1467 4.66      
9 A 1550 1458 3.39      
10 A 1522 1432 6.71      
11 A 1381 1299 26.70      
12 A 1202 1130 0.65      
13 A 1091 1026 21.76      
14 A 1061 998 127.43      
15 A 692 650 125.49      
16 A 409 385 70.25      
17 A 318 299 179.33      
18 A 200 188 3.21      
19 A 130 122 149.54      
20 A 75 71 16.22      
21 A 51 48 17.38      

Unscaled Zero Point Vibrational Energy (zpe) 17047.5 cm-1
Scaled (by 0.9406) Zero Point Vibrational Energy (zpe) 16034.9 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
0.97222 0.13667 0.12434

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.173 0.163 -0.012
O2 2.063 -0.212 0.101
O3 -0.651 0.669 -0.094
H4 2.585 0.134 -0.630
H5 -0.923 1.310 0.574
C6 -1.502 -0.485 -0.001
H7 -2.540 -0.221 -0.204
H8 -1.153 -1.177 -0.760
H9 -1.423 -0.958 0.977

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 C6 H7 H8 H9
H10.97191.89491.54112.46042.75293.73812.78682.9958
O20.97192.85980.96253.38463.57714.61313.46613.6708
O31.89492.85983.32320.96531.43642.09072.02522.0949
H41.54110.96253.32323.89084.18105.15463.96254.4536
H52.46043.38460.96533.89081.97172.35862.83162.3570
C62.75293.57711.43644.18101.97171.08991.08501.0899
H73.73814.61312.09075.15462.35861.08991.77451.7852
H82.78683.46612.02523.96252.83161.08501.77451.7720
H92.99583.67082.09494.45362.35701.08991.78521.7720

picture of water methanol dimer state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 H4 105.631 H1 O3 H5 114.743
H1 O3 C6 110.706 O2 H1 O3 171.552
O3 C6 H7 110.962 O3 C6 H8 106.031
O3 C6 H9 111.299 H5 O3 C6 108.779
H7 C6 H8 109.355 H7 C6 H9 109.964
H8 C6 H9 109.128
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 0.453      
2 O -0.804      
3 O -0.664      
4 H 0.357      
5 H 0.372      
6 C -0.099      
7 H 0.118      
8 H 0.143      
9 H 0.124      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.872 1.049 -0.324 3.074
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.148 2.567 -5.574
y 2.567 -18.987 1.840
z -5.574 1.840 -19.227
Traceless
 xyz
x -0.041 2.567 -5.574
y 2.567 0.201 1.840
z -5.574 1.840 -0.160
Polar
3z2-r2-0.319
x2-y2-0.161
xy2.567
xz-5.574
yz1.840


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.189 0.072 -0.081
y 0.072 3.662 0.068
z -0.081 0.068 3.431


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