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: B3PW91/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/aug-cc-pVDZ
 hartrees
Energy at 0K-154.987158
Energy at 298.15K-154.993787
HF Energy-154.987158
Nuclear repulsion energy83.789180
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 B3PW91/aug-cc-pVDZ
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 3137 3026 22.13 98.93 0.31 0.47
2 A1 2983 2877 64.05 330.93 0.02 0.03
3 A1 1481 1429 4.48 4.51 0.73 0.84
4 A1 1457 1405 0.08 3.68 0.73 0.84
5 A1 1252 1208 6.32 0.36 0.70 0.83
6 A1 956 922 35.15 7.70 0.32 0.49
7 A1 411 396 2.32 1.21 0.14 0.25
8 A2 3037 2929 0.00 21.41 0.75 0.86
9 A2 1448 1397 0.00 12.37 0.75 0.86
10 A2 1144 1103 0.00 1.63 0.75 0.86
11 A2 197 190 0.00 0.25 0.75 0.86
12 B1 3031 2924 127.52 106.52 0.75 0.86
13 B1 1460 1409 15.31 0.08 0.75 0.86
14 B1 1175 1133 6.14 0.00 0.75 0.86
15 B1 240 232 5.28 0.00 0.75 0.86
16 B2 3136 3025 28.28 67.00 0.75 0.86
17 B2 2972 2866 64.85 2.06 0.75 0.86
18 B2 1463 1411 12.87 1.52 0.75 0.86
19 B2 1426 1376 1.16 1.64 0.75 0.86
20 B2 1201 1159 117.97 0.76 0.75 0.86
21 B2 1115 1075 22.54 1.21 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17360.6 cm-1
Scaled (by 0.9646) Zero Point Vibrational Energy (zpe) 16746.0 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 B3PW91/aug-cc-pVDZ
ABC
1.30338 0.33436 0.29646

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/aug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.590
C2 0.000 1.170 -0.195
C3 0.000 -1.170 -0.195
H4 0.000 2.025 0.491
H5 0.000 -2.025 0.491
H6 0.897 1.225 -0.839
H7 -0.897 1.225 -0.839
H8 -0.897 -1.225 -0.839
H9 0.897 -1.225 -0.839

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7 H8 H9
O11.40931.40932.02752.02752.08522.08522.08522.0852
C21.40932.34021.09653.26811.10551.10552.63732.6373
C31.40932.34023.26811.09652.63732.63731.10551.1055
H42.02751.09653.26814.05021.79291.79293.62463.6246
H52.02753.26811.09654.05023.62463.62461.79291.7929
H62.08521.10552.63731.79293.62461.79403.03662.4500
H72.08521.10552.63731.79293.62461.79402.45003.0366
H82.08522.63731.10553.62461.79293.03662.45001.7940
H92.08522.63731.10553.62461.79292.45003.03661.7940

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 107.369 O1 C2 H6 111.460
O1 C2 H7 111.460 O1 C3 H5 107.369
O1 C3 H8 111.460 O1 C3 H9 111.460
C2 O1 C3 112.254 H4 C2 H6 109.016
H4 C2 H7 109.016 H5 C3 H8 109.016
H5 C3 H9 109.016 H6 C2 H7 108.467
H8 C3 H9 108.467
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.531      
2 C 0.786      
3 C 0.786      
4 H -0.312      
5 H -0.312      
6 H -0.104      
7 H -0.104      
8 H -0.104      
9 H -0.104      


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 -1.245 1.245
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.253 0.000 0.000
y 0.000 -17.526 0.000
z 0.000 0.000 -21.384
Traceless
 xyz
x -0.798 0.000 0.000
y 0.000 3.292 0.000
z 0.000 0.000 -2.494
Polar
3z2-r2-4.988
x2-y2-2.726
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.660 0.000 0.000
y 0.000 5.815 0.000
z 0.000 0.000 4.741


<r2> (average value of r2) Å2
<r2> 52.712
(<r2>)1/2 7.260