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: PBE1PBE/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 PBE1PBE/3-21G*
 hartrees
Energy at 0K-153.989403
Energy at 298.15K-153.996105
HF Energy-153.989403
Nuclear repulsion energy82.618687
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 PBE1PBE/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 3156 3029 24.20 85.77 0.35 0.52
2 A1 3007 2886 42.99 189.27 0.03 0.07
3 A1 1588 1524 1.47 32.59 0.75 0.86
4 A1 1527 1466 0.78 12.74 0.69 0.82
5 A1 1253 1202 0.03 4.94 0.68 0.81
6 A1 916 879 20.73 11.29 0.34 0.51
7 A1 405 389 4.14 0.55 0.05 0.10
8 A2 3049 2926 0.00 15.53 0.75 0.86
9 A2 1545 1483 0.00 51.87 0.75 0.86
10 A2 1156 1110 0.00 11.14 0.75 0.86
11 A2 250 240 0.00 0.24 0.75 0.86
12 B1 3046 2924 138.07 89.98 0.75 0.86
13 B1 1553 1491 19.28 0.97 0.75 0.86
14 B1 1189 1141 1.48 4.42 0.75 0.86
15 B1 251 241 8.53 0.04 0.75 0.86
16 B2 3153 3026 22.46 71.54 0.75 0.86
17 B2 2996 2876 43.51 1.91 0.75 0.86
18 B2 1568 1505 18.03 5.11 0.75 0.86
19 B2 1485 1425 3.92 11.06 0.75 0.86
20 B2 1171 1124 63.09 0.33 0.75 0.86
21 B2 1107 1063 30.13 5.37 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17685.8 cm-1
Scaled (by 0.9598) Zero Point Vibrational Energy (zpe) 16974.9 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 PBE1PBE/3-21G*
ABC
1.24652 0.32617 0.28672

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.615
C2 0.000 1.188 -0.206
C3 0.000 -1.188 -0.206
H4 0.000 2.038 0.480
H5 0.000 -2.038 0.480
H6 0.892 1.244 -0.851
H7 -0.892 1.244 -0.851
H8 -0.892 -1.244 -0.851
H9 0.892 -1.244 -0.851

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7 H8 H9
O11.44391.44392.04272.04272.11902.11902.11902.1190
C21.44392.37581.09253.29821.10181.10182.66922.6692
C31.44392.37583.29821.09252.66922.66921.10181.1018
H42.04271.09253.29824.07651.78791.78793.65223.6522
H52.04273.29821.09254.07653.65223.65221.78791.7879
H62.11901.10182.66921.78793.65221.78353.06112.4878
H72.11901.10182.66921.78793.65221.78352.48783.0611
H82.11902.66921.10183.65221.78793.06112.48781.7835
H92.11902.66921.10183.65221.78792.48783.06111.7835

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 106.462 O1 C2 H6 111.990
O1 C2 H7 111.990 O1 C3 H5 106.462
O1 C3 H8 111.990 O1 C3 H9 111.990
C2 O1 C3 110.712 H4 C2 H6 109.135
H4 C2 H7 109.135 H5 C3 H8 109.135
H5 C3 H9 109.135 H6 C2 H7 108.071
H8 C3 H9 108.071
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.491      
2 C -0.373      
3 C -0.373      
4 H 0.231      
5 H 0.231      
6 H 0.194      
7 H 0.194      
8 H 0.194      
9 H 0.194      


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 -1.586 1.586
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.111 0.000 0.000
y 0.000 -16.401 0.000
z 0.000 0.000 -21.011
Traceless
 xyz
x -1.405 0.000 0.000
y 0.000 4.159 0.000
z 0.000 0.000 -2.755
Polar
3z2-r2-5.510
x2-y2-3.709
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.300 0.000 0.000
y 0.000 4.386 0.000
z 0.000 0.000 3.304


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