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

using model chemistry: MP2_cp/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at MP2_cp/6-31G*
 hartrees
Energy at 0K-191.551287
Energy at 298.15K-191.543328
Nuclear repulsion energy 
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 MP2/6-31G*
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' 3762 3548 10.91      
2 A' 3697 3486 372.68      
3 A' 3203 3020 44.19      
4 A' 3062 2888 62.11      
5 A' 1730 1631 92.70      
6 A' 1581 1491 1.95      
7 A' 1540 1453 8.53      
8 A' 1488 1403 50.96      
9 A' 1149 1084 12.81      
10 A' 1110 1047 96.10      
11 A' 311 293 281.77      
12 A' 187 176 6.65      
13 A' 68 64 52.50      
14 A" 3895 3673 68.41      
15 A" 3124 2946 78.74      
16 A" 1566 1476 0.87      
17 A" 1207 1138 0.96      
18 A" 740 698 153.00      
19 A" 220 207 5.52      
20 A" 103 97 35.08      
21 A" 61 57 51.17      

Unscaled Zero Point Vibrational Energy (zpe) 16900.4 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 15937.1 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 MP2/6-31G*
ABC
1.12926 0.12556 0.11737

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.000 0.394 0.000
O2 -0.972 0.362 0.000
O3 1.983 0.577 0.000
C4 -1.358 -0.998 0.000
H5 2.266 1.092 0.769
H6 2.266 1.092 -0.769
H7 -2.450 -1.020 0.000
H8 -1.008 -1.542 -0.889
H9 -1.008 -1.542 0.889

Atom - Atom Distances (Å)
  H1 O2 O3 C4 H5 H6 H7 H8 H9
H10.97251.99091.94532.49262.49262.82892.35732.3573
O20.97252.96231.41373.40733.40732.02332.10182.1018
O31.99092.96233.69370.96770.96774.71153.77153.7715
C41.94531.41373.69374.25414.25411.09191.09971.0997
H52.49263.40730.96774.25411.53725.22444.51744.2041
H62.49263.40730.96774.25411.53725.22444.20414.5174
H72.82892.02334.71151.09195.22445.22441.77301.7730
H82.35732.10183.77151.09974.51744.20411.77301.7774
H92.35732.10183.77151.09974.20414.51741.77301.7774

picture of methanol water dimer state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability