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 H2OCH3OCH3 (water dimethylether dimer)

using model chemistry: MP2/6-311+G(3df,2pd)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP2/6-311+G(3df,2pd)
 hartrees
Energy at 0K-231.060594
Energy at 298.15K-231.068541
HF Energy-230.189154
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy136.217874
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 MP2/6-311+G(3df,2pd)
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 3954 3756 105.65      
2 A 3692 3508 455.58      
3 A 3191 3031 13.55      
4 A 3191 3031 13.65      
5 A 3118 2962 0.06      
6 A 3111 2956 70.14      
7 A 3040 2888 46.95      
8 A 3037 2885 40.40      
9 A 1658 1575 39.49      
10 A 1532 1456 6.61      
11 A 1518 1442 10.25      
12 A 1517 1441 18.10      
13 A 1506 1430 0.04      
14 A 1501 1425 0.34      
15 A 1473 1399 1.18      
16 A 1282 1218 6.99      
17 A 1212 1151 6.17      
18 A 1210 1150 90.33      
19 A 1180 1121 0.00      
20 A 1132 1075 43.36      
21 A 952 904 43.32      
22 A 676 642 51.65      
23 A 421 400 18.60      
24 A 372 353 87.21      
25 A 271 258 28.63      
26 A 197 187 0.12      
27 A 176 167 4.07      
28 A 114 108 105.60      
29 A 42 40 14.61      
30 A 37 35 16.81      

Unscaled Zero Point Vibrational Energy (zpe) 23154.2 cm-1
Scaled (by 0.95) Zero Point Vibrational Energy (zpe) 21996.5 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 MP2/6-311+G(3df,2pd)
ABC
0.30622 0.12437 0.09689

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311+G(3df,2pd)

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.487 -0.000 -0.498
C2 0.973 1.168 0.137
C3 0.975 -1.167 0.137
H4 0.566 -2.020 -0.395
H5 0.655 -1.203 1.181
H6 0.563 2.020 -0.395
H7 2.064 1.201 0.095
H8 0.653 1.204 1.181
H9 2.066 -1.199 0.095
O10 -2.245 -0.000 0.172
H11 -1.354 -0.001 -0.211
H12 -2.835 -0.003 -0.583

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7 H8 H9 O10 H11 H12
O11.41521.41522.02422.07262.02422.06982.07262.06982.81261.86323.3222
C21.41522.33443.25722.61021.08531.09251.09282.60723.42362.62704.0479
C31.41522.33441.08531.09283.25712.60692.61041.09253.42512.62824.0479
H42.02423.25721.08531.77724.04013.58633.58941.77883.50762.79313.9584
H52.07262.61021.09281.77723.58942.99112.40721.78083.29812.72444.0904
H62.02421.08533.25714.04013.58941.77881.77723.58633.50562.79153.9587
H72.06981.09252.60693.58632.99111.77881.78082.40034.47433.63655.0899
H82.07261.09282.61043.58942.40721.77721.78082.99193.29622.72304.0899
H92.06982.60721.09251.77881.78083.58632.40032.99194.47553.63745.0899
O102.81263.42363.42513.50763.29813.50564.47433.29624.47550.96940.9577
H111.86322.62702.62822.79312.72442.79153.63652.72303.63740.96941.5263
H123.32224.04794.04793.95844.09043.95875.08994.08995.08990.95771.5263

picture of water dimethylether dimer state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 H6 107.361 H1 O3 C4 107.362
H1 O3 C5 110.806 O2 H1 O3 111.124
O3 C4 H7 21.486 O3 C4 H8 21.527
O3 C4 H9 35.367 O3 C5 H10 87.293
O3 C5 H11 73.318 O3 C5 H12 80.083
C4 O3 C5 109.361 H7 C4 H8 28.738
H7 C4 H9 36.438 H8 C4 H9 56.239
H10 C5 H11 14.979 H10 C5 H12 8.400
H11 C5 H12 11.708
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP2/6-311+G(3df,2pd) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.821      
2 C 0.338      
3 C 0.338      
4 H 0.023      
5 H 0.029      
6 H 0.023      
7 H 0.014      
8 H 0.029      
9 H 0.014      
10 O -0.447      
11 H 0.319      
12 H 0.140      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.081 -0.003 -0.647 2.179
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.038 0.012 5.199
y 0.012 -24.860 0.005
z 5.199 0.005 -27.608
Traceless
 xyz
x -0.804 0.012 5.199
y 0.012 2.463 0.005
z 5.199 0.005 -1.658
Polar
3z2-r2-3.317
x2-y2-2.178
xy0.012
xz5.199
yz0.005


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