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All results from a given calculation for CH3OCH3 (Dimethyl ether)

using model chemistry: MP2/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/3-21G
 hartrees
Energy at 0K-153.515594
Energy at 298.15K-153.522291
HF Energy-153.210794
Nuclear repulsion energy81.845978
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 MP2/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3178 3034 28.30 76.40 0.37 0.54
2 A1 3038 2900 40.12 170.02 0.04 0.07
3 A1 1623 1550 0.00 34.12 0.75 0.86
4 A1 1559 1488 0.31 11.51 0.66 0.79
5 A1 1267 1209 0.00 7.40 0.69 0.82
6 A1 877 837 16.33 12.10 0.30 0.47
7 A1 406 388 3.93 0.49 0.04 0.08
8 A2 3083 2942 0.00 11.01 0.75 0.86
9 A2 1587 1515 0.00 50.12 0.75 0.86
10 A2 1176 1123 0.00 13.03 0.75 0.86
11 A2 245 234 0.00 0.17 0.75 0.86
12 B1 3081 2940 133.54 81.90 0.75 0.86
13 B1 1595 1522 10.10 1.43 0.75 0.86
14 B1 1207 1152 3.33 5.16 0.75 0.86
15 B1 248 237 8.00 0.05 0.75 0.86
16 B2 3176 3031 24.62 66.87 0.75 0.86
17 B2 3033 2895 33.08 0.61 0.75 0.86
18 B2 1610 1537 11.55 3.95 0.75 0.86
19 B2 1516 1447 15.65 10.63 0.75 0.86
20 B2 1175 1122 35.91 1.40 0.75 0.86
21 B2 1086 1037 47.41 5.21 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17882.7 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 17069.0 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 MP2/3-21G
ABC
1.22122 0.31918 0.27996

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.625
C2 0.000 1.204 -0.212
C3 0.000 -1.204 -0.212
H4 0.000 2.050 0.477
H5 0.000 -2.050 0.477
H6 0.891 1.255 -0.854
H7 -0.891 1.255 -0.854
H8 -0.891 -1.255 -0.854
H9 0.891 -1.255 -0.854

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7 H8 H9
O11.46661.46662.05532.05532.13472.13472.13472.1347
C21.46662.40811.09123.32621.09951.09952.69312.6931
C31.46662.40813.32621.09122.69312.69311.09951.0995
H42.05531.09123.32624.09991.78841.78843.67273.6727
H52.05533.32621.09124.09993.67273.67271.78841.7884
H62.13471.09952.69311.78843.67271.78273.07852.5098
H72.13471.09952.69311.78843.67271.78272.50983.0785
H82.13472.69311.09953.67271.78843.07852.50981.7827
H92.13472.69311.09953.67271.78842.50983.07851.7827

picture of Dimethyl ether state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H4 106.006 O1 C2 H6 111.788
O1 C2 H7 111.788 O1 C3 H5 106.006
O1 C3 H8 111.788 O1 C3 H9 111.788
C2 O1 C3 110.374 H4 C2 H6 109.445
H4 C2 H7 109.445 H5 C3 H8 109.445
H5 C3 H9 109.445 H6 C2 H7 108.324
H8 C3 H9 108.324
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability