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

using model chemistry: mPW1PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/3-21G*
 hartrees
Energy at 0K-154.132348
Energy at 298.15K-154.139044
HF Energy-154.132348
Nuclear repulsion energy82.615034
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 mPW1PW91/3-21G*
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 3161 3002 25.12 86.40 0.35 0.52
2 A1 3014 2863 43.93 190.33 0.04 0.07
3 A1 1593 1513 1.37 32.52 0.75 0.86
4 A1 1532 1455 0.72 12.57 0.69 0.82
5 A1 1256 1192 0.03 4.94 0.67 0.81
6 A1 912 866 20.78 11.46 0.34 0.51
7 A1 404 384 4.18 0.55 0.06 0.11
8 A2 3055 2901 0.00 15.79 0.75 0.86
9 A2 1551 1473 0.00 51.73 0.75 0.86
10 A2 1158 1100 0.00 11.34 0.75 0.86
11 A2 248 235 0.00 0.24 0.75 0.86
12 B1 3053 2899 141.18 91.01 0.75 0.86
13 B1 1559 1481 18.75 0.97 0.75 0.86
14 B1 1191 1131 1.52 4.38 0.75 0.86
15 B1 249 237 8.58 0.04 0.75 0.86
16 B2 3158 2999 23.22 72.46 0.75 0.86
17 B2 3004 2852 44.18 1.98 0.75 0.86
18 B2 1573 1494 17.81 5.12 0.75 0.86
19 B2 1490 1415 4.52 10.90 0.75 0.86
20 B2 1172 1113 58.79 0.47 0.75 0.86
21 B2 1106 1051 35.00 5.35 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17720.3 cm-1
Scaled (by 0.9496) Zero Point Vibrational Energy (zpe) 16827.2 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 mPW1PW91/3-21G*
ABC
1.24989 0.32552 0.28633

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.614
C2 0.000 1.189 -0.206
C3 0.000 -1.189 -0.206
H4 0.000 2.037 0.481
H5 0.000 -2.037 0.481
H6 0.891 1.246 -0.849
H7 -0.891 1.246 -0.849
H8 -0.891 -1.246 -0.849
H9 0.891 -1.246 -0.849

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7 H8 H9
O11.44461.44462.04162.04162.11832.11832.11832.1183
C21.44462.37901.09123.29911.10021.10022.67232.6723
C31.44462.37903.29911.09122.67232.67231.10021.1002
H42.04161.09123.29914.07461.78551.78553.65323.6532
H52.04163.29911.09124.07463.65323.65321.78551.7855
H62.11831.10022.67231.78553.65321.78173.06422.4930
H72.11831.10022.67231.78553.65321.78172.49303.0642
H82.11832.67231.10023.65321.78553.06422.49301.7817
H92.11832.67231.10023.65321.78552.49303.06421.7817

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 106.413 O1 C2 H6 111.985
O1 C2 H7 111.985 O1 C3 H5 106.413
O1 C3 H8 111.985 O1 C3 H9 111.985
C2 O1 C3 110.860 H4 C2 H6 109.133
H4 C2 H7 109.133 H5 C3 H8 109.133
H5 C3 H9 109.133 H6 C2 H7 108.129
H8 C3 H9 108.129
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.494      
2 C -0.370      
3 C -0.370      
4 H 0.230      
5 H 0.230      
6 H 0.193      
7 H 0.193      
8 H 0.193      
9 H 0.193      


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 -1.598 1.598
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.049 0.000 0.000
y 0.000 -16.332 0.000
z 0.000 0.000 -20.959
Traceless
 xyz
x -1.403 0.000 0.000
y 0.000 4.172 0.000
z 0.000 0.000 -2.768
Polar
3z2-r2-5.537
x2-y2-3.716
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.291 0.000 0.000
y 0.000 4.376 0.000
z 0.000 0.000 3.295


<r2> (average value of r2) Å2
<r2> 53.476
(<r2>)1/2 7.313