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 CH3OHH2O (methanol water dimer)

using model chemistry: MP2/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-191.866376
Energy at 298.15K 
Counterpoise corrected energy-191.865555
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy78.729698
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/aug-cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at MP2/aug-cc-pVTZ
ABC
1.14724 0.12270 0.11496

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.166 0.354 0.007
O2 -0.737 0.702 0.001
O3 2.018 -0.218 -0.000
C4 -1.628 -0.402 -0.001
H5 2.509 0.111 0.759
H6 2.494 0.125 -0.763
H7 -2.638 0.001 -0.010
H8 -1.499 -1.031 -0.884
H9 -1.512 -1.022 0.891

Atom - Atom Distances (Å)
  H1 O2 O3 C4 H5 H6 H7 H8 H9
H10.96721.93861.94632.47252.46342.82562.34142.3430
O20.96722.90431.41853.38473.36992.02622.08962.0896
O31.93862.90433.65040.96220.96234.66073.71583.7285
C41.94631.41853.65044.23684.22491.08701.09241.0924
H52.47253.38470.96224.23681.52225.20464.47904.1794
H62.46343.36990.96234.22491.52225.18834.15834.4834
H72.82562.02624.66071.08705.20465.18831.76791.7679
H82.34142.08963.71581.09244.47904.15831.76791.7752
H92.34302.08963.72851.09244.17944.48341.76791.7752

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 107.830 H1 O3 H5 112.522
H1 O3 H6 111.779 O2 H1 O3 176.031
O2 C4 H7 107.197 O2 C4 H8 111.998
O2 C4 H9 111.999 H5 O3 H6 104.549
H7 C4 H8 108.424 H7 C4 H9 108.421
H8 C4 H9 108.676
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP2/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.329      
2 O -0.579      
3 O -0.437      
4 C -0.691      
5 H 0.218      
6 H 0.218      
7 H 0.325      
8 H 0.309      
9 H 0.309      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.758 -0.671 0.003 2.838
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -10.799 4.476 0.024
y 4.476 -22.803 -0.030
z 0.024 -0.030 -17.970
Traceless
 xyz
x 9.588 4.476 0.024
y 4.476 -8.419 -0.030
z 0.024 -0.030 -1.169
Polar
3z2-r2-2.339
x2-y212.005
xy4.476
xz0.024
yz-0.030


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


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