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

using model chemistry: G4

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at G4
 hartrees
Energy at 0K-154.915517
Energy at 298.15K-154.910233
HF Energy-155.039896
Nuclear repulsion energy83.951677
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 B3LYP/6-31G(2df,p)
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 3112 3003 25.86 92.26 0.33 0.49
2 A1 2970 2866 55.55 199.69 0.03 0.06
3 A1 1522 1469 0.86 14.40 0.74 0.85
4 A1 1493 1441 0.04 13.71 0.74 0.85
5 A1 1273 1229 5.85 2.04 0.58 0.74
6 A1 953 920 31.03 8.06 0.37 0.54
7 A1 415 400 2.34 0.53 0.03 0.06
8 A2 3007 2902 0.00 15.39 0.75 0.86
9 A2 1480 1428 0.00 32.38 0.75 0.86
10 A2 1167 1127 0.00 5.29 0.75 0.86
11 A2 220 212 0.00 0.20 0.75 0.86
12 B1 3003 2898 138.60 91.68 0.75 0.86
13 B1 1490 1438 9.27 0.30 0.75 0.86
14 B1 1202 1160 7.26 2.35 0.75 0.86
15 B1 249 240 5.07 0.07 0.75 0.86
16 B2 3110 3001 33.01 69.92 0.75 0.86
17 B2 2956 2853 55.24 1.80 0.75 0.86
18 B2 1499 1446 12.09 3.01 0.75 0.86
19 B2 1463 1412 7.05 6.32 0.75 0.86
20 B2 1205 1163 104.74 0.01 0.75 0.86
21 B2 1129 1090 36.09 3.70 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17459.0 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 16848.0 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 B3LYP/6-31G(2df,p)
ABC
1.31279 0.33485 0.29692

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.588
C2 0.000 1.169 -0.194
C3 0.000 -1.169 -0.194
H4 0.000 2.021 0.490
H5 0.000 -2.021 0.490
H6 0.892 1.231 -0.839
H7 -0.892 1.231 -0.839
H8 -0.892 -1.231 -0.839
H9 0.892 -1.231 -0.839

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7 H8 H9
O11.40651.40652.02382.02382.08482.08482.08482.0848
C21.40652.33801.09303.26291.10221.10222.64002.6400
C31.40652.33803.26291.09302.64002.64001.10221.1022
H42.02381.09303.26294.04291.78521.78523.62463.6246
H52.02383.26291.09304.04293.62463.62461.78521.7852
H62.08481.10222.64001.78523.62461.78323.03952.4614
H72.08481.10222.64001.78523.62461.78322.46143.0395
H82.08482.64001.10223.62461.78523.03952.46141.7832
H92.08482.64001.10223.62461.78522.46143.03951.7832

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 107.573 O1 C2 H6 112.082
O1 C2 H7 112.082 O1 C3 H5 107.573
O1 C3 H8 112.082 O1 C3 H9 112.082
C2 O1 C3 112.936 H4 C2 H6 108.592
H4 C2 H7 108.592 H5 C3 H8 108.592
H5 C3 H9 108.592 H6 C2 H7 107.820
H8 C3 H9 107.820
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.212      
2 C -0.223      
3 C -0.223      
4 H 0.127      
5 H 0.127      
6 H 0.101      
7 H 0.101      
8 H 0.101      
9 H 0.101      


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 -1.152 1.152
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


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


<r2> (average value of r2) Å2
<r2> 52.400
(<r2>)1/2 7.239