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 CH3OCH3 (Dimethyl ether)

using model chemistry: B2PLYP/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B2PLYP/STO-3G
 hartrees
Energy at 0K-152.782083
Energy at 298.15K-152.788701
HF Energy-152.731246
Nuclear repulsion energy81.918779
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 B2PLYP/STO-3G
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 3486 3486 4.58 34.95 0.60 0.75
2 A1 3275 3275 8.84 76.99 0.01 0.02
3 A1 1707 1707 0.56 26.74 0.75 0.86
4 A1 1637 1637 0.23 5.51 0.74 0.85
5 A1 1348 1348 0.00 3.80 0.60 0.75
6 A1 1001 1001 2.81 9.08 0.31 0.47
7 A1 466 466 0.88 0.58 0.13 0.24
8 A2 3424 3424 0.00 7.24 0.75 0.86
9 A2 1680 1680 0.00 32.21 0.75 0.86
10 A2 1198 1198 0.00 5.33 0.75 0.86
11 A2 236 236 0.00 0.03 0.75 0.86
12 B1 3420 3420 28.27 41.40 0.75 0.86
13 B1 1679 1679 6.15 2.57 0.75 0.86
14 B1 1216 1216 4.98 2.88 0.75 0.86
15 B1 270 270 3.20 0.01 0.75 0.86
16 B2 3483 3483 0.13 31.60 0.75 0.86
17 B2 3275 3275 17.67 0.11 0.75 0.86
18 B2 1703 1703 7.04 0.37 0.75 0.86
19 B2 1599 1599 18.83 6.49 0.75 0.86
20 B2 1261 1261 17.88 1.63 0.75 0.86
21 B2 1180 1180 0.05 3.21 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 19271.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 19271.5 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 B2PLYP/STO-3G
ABC
1.16282 0.32986 0.28526

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.652
C2 0.000 1.177 -0.218
C3 0.000 -1.177 -0.218
H4 0.000 2.064 0.442
H5 0.000 -2.064 0.442
H6 0.898 1.220 -0.870
H7 -0.898 1.220 -0.870
H8 -0.898 -1.220 -0.870
H9 0.898 -1.220 -0.870

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7 H8 H9
O11.46401.46402.07422.07422.14782.14782.14782.1478
C21.46402.35461.10533.30751.11091.11092.64212.6421
C31.46402.35463.30751.10532.64212.64211.11091.1109
H42.07421.10533.30754.12711.80021.80023.64883.6488
H52.07423.30751.10534.12713.64883.64881.80021.8002
H62.14781.11092.64211.80023.64881.79673.03072.4407
H72.14781.11092.64211.80023.64881.79672.44073.0307
H82.14782.64211.11093.64881.80023.03072.44071.7967
H92.14782.64211.11093.64881.80022.44073.03071.7967

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 106.838 O1 C2 H6 112.337
O1 C2 H7 112.337 O1 C3 H5 106.838
O1 C3 H8 112.337 O1 C3 H9 112.337
C2 O1 C3 107.065 H4 C2 H6 108.642
H4 C2 H7 108.642 H5 C3 H8 108.642
H5 C3 H9 108.642 H6 C2 H7 107.936
H8 C3 H9 107.936
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.191      
2 C -0.105      
3 C -0.105      
4 H 0.076      
5 H 0.076      
6 H 0.062      
7 H 0.062      
8 H 0.062      
9 H 0.062      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -1.213 1.213
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.546 0.000 0.000
y 0.000 -16.762 0.000
z 0.000 0.000 -19.328
Traceless
 xyz
x -0.501 0.000 0.000
y 0.000 2.175 0.000
z 0.000 0.000 -1.674
Polar
3z2-r2-3.347
x2-y2-1.784
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.662 0.000 0.000
y 0.000 2.769 0.000
z 0.000 0.000 1.804


<r2> (average value of r2) Å2
<r2> 53.100
(<r2>)1/2 7.287