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: B1B95/CEP-31G

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/CEP-31G
 hartrees
Energy at 0K-41.086967
Energy at 298.15K-41.092692
Nuclear repulsion energy50.701368
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/CEP-31G
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 3874 3710 68.59      
2 A 3800 3638 23.89      
3 A 3524 3374 467.21      
4 A 3203 3067 34.97      
5 A 3144 3010 83.89      
6 A 3056 2926 72.03      
7 A 1593 1525 89.38      
8 A 1507 1443 7.27      
9 A 1501 1437 7.02      
10 A 1484 1421 2.21      
11 A 1336 1279 34.97      
12 A 1155 1106 0.02      
13 A 1074 1028 22.92      
14 A 1041 997 158.60      
15 A 764 732 162.45      
16 A 447 428 155.63      
17 A 320 306 204.23      
18 A 219 209 2.59      
19 A 173 166 200.68      
20 A 69 66 24.98      
21 A 51 49 9.91      

Unscaled Zero Point Vibrational Energy (zpe) 16666.4 cm-1
Scaled (by 0.9575) Zero Point Vibrational Energy (zpe) 15958.0 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/CEP-31G
ABC
1.04646 0.13719 0.12587

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/CEP-31G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.118 0.123 0.009
O2 2.049 -0.198 0.112
O3 -0.567 0.623 -0.080
H4 2.553 -0.059 -0.711
H5 -0.861 1.427 0.390
C6 -1.552 -0.448 0.004
H7 -2.503 -0.153 -0.471
H8 -1.124 -1.297 -0.544
H9 -1.732 -0.752 1.049

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 C6 H7 H8 H9
H10.99081.75951.61552.40042.72983.66312.71113.1575
O20.99082.74880.97473.34523.61134.59013.42223.9351
O31.75952.74883.25470.97701.45702.12212.05212.1267
H41.61550.97473.25473.88234.18425.06253.88364.6837
H52.40043.34520.97703.88232.03502.43562.89162.4377
C62.72983.61131.45704.18422.03501.10351.09701.1035
H73.66314.59012.12215.06252.43561.10351.79331.8064
H82.71113.42222.05213.88362.89161.09701.79331.7899
H93.15753.93512.12674.68372.43771.10351.80641.7899

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 110.553 H1 O3 H5 119.863
H1 O3 C6 115.821 O2 H1 O3 176.042
O3 C6 H7 111.192 O3 C6 H8 106.067
O3 C6 H9 111.570 H5 O3 C6 111.946
H7 C6 H8 109.167 H7 C6 H9 109.867
H8 C6 H9 108.861
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.357      
2 O -0.710      
3 O -0.505      
4 H 0.316      
5 H 0.360      
6 C -0.370      
7 H 0.172      
8 H 0.205      
9 H 0.175      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -3.805 1.194 -0.949 4.099
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.777 1.301 -6.112
y 1.301 -17.534 1.885
z -6.112 1.885 -19.226
Traceless
 xyz
x -1.397 1.301 -6.112
y 1.301 1.968 1.885
z -6.112 1.885 -0.571
Polar
3z2-r2-1.142
x2-y2-2.243
xy1.301
xz-6.112
yz1.885


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.627 -0.087 -0.374
y -0.087 2.638 0.062
z -0.374 0.062 2.568


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