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/6-31G

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/6-31G
 hartrees
Energy at 0K-154.743665
Energy at 298.15K-154.750276
HF Energy-154.639881
Nuclear repulsion energy82.235742
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/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3189 3189 27.37 87.93 0.35 0.52
2 A1 3025 3025 51.97 219.35 0.03 0.07
3 A1 1573 1573 0.67 29.60 0.75 0.86
4 A1 1526 1526 0.18 11.36 0.69 0.82
5 A1 1264 1264 0.12 6.84 0.64 0.78
6 A1 875 875 23.52 14.06 0.34 0.51
7 A1 400 400 4.01 0.51 0.07 0.12
8 A2 3082 3082 0.00 15.13 0.75 0.86
9 A2 1542 1542 0.00 46.81 0.75 0.86
10 A2 1161 1161 0.00 14.30 0.75 0.86
11 A2 215 215 0.00 0.23 0.75 0.86
12 B1 3080 3080 149.09 96.97 0.75 0.86
13 B1 1550 1550 14.24 0.99 0.75 0.86
14 B1 1192 1192 4.56 5.11 0.75 0.86
15 B1 233 233 9.17 0.01 0.75 0.86
16 B2 3186 3186 24.56 77.40 0.75 0.86
17 B2 3017 3017 47.27 1.37 0.75 0.86
18 B2 1558 1558 13.90 4.96 0.75 0.86
19 B2 1496 1496 6.57 9.99 0.75 0.86
20 B2 1175 1175 43.20 1.45 0.75 0.86
21 B2 1080 1080 62.05 6.59 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17708.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 17708.5 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/6-31G
ABC
1.27718 0.31691 0.28118

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.600
C2 0.000 1.210 -0.203
C3 0.000 -1.210 -0.203
H4 0.000 2.041 0.501
H5 0.000 -2.041 0.501
H6 0.894 1.267 -0.840
H7 -0.894 1.267 -0.840
H8 -0.894 -1.267 -0.840
H9 0.894 -1.267 -0.840

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7 H8 H9
O11.45181.45182.04312.04312.11592.11592.11592.1159
C21.45182.41911.08963.32571.09901.09902.70852.7085
C31.45182.41913.32571.08962.70852.70851.09901.0990
H42.04311.08963.32574.08151.78811.78813.67933.6793
H52.04313.32571.08964.08153.67933.67931.78811.7881
H62.11591.09902.70851.78813.67931.78753.10052.5334
H72.11591.09902.70851.78813.67931.78752.53343.1005
H82.11592.70851.09903.67931.78813.10052.53341.7875
H92.11592.70851.09903.67931.78812.53343.10051.7875

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 106.140 O1 C2 H6 111.341
O1 C2 H7 111.341 O1 C3 H5 106.140
O1 C3 H8 111.341 O1 C3 H9 111.341
C2 O1 C3 112.839 H4 C2 H6 109.576
H4 C2 H7 109.576 H5 C3 H8 109.576
H5 C3 H9 109.576 H6 C2 H7 108.825
H8 C3 H9 108.825
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.539      
2 C -0.147      
3 C -0.147      
4 H 0.162      
5 H 0.162      
6 H 0.127      
7 H 0.127      
8 H 0.127      
9 H 0.127      


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 -1.772 1.772
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.389 0.000 0.000
y 0.000 -16.504 0.000
z 0.000 0.000 -21.566
Traceless
 xyz
x -1.354 0.000 0.000
y 0.000 4.474 0.000
z 0.000 0.000 -3.120
Polar
3z2-r2-6.239
x2-y2-3.885
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.462 0.000 0.000
y 0.000 4.591 0.000
z 0.000 0.000 3.529


<r2> (average value of r2) Å2
<r2> 54.367
(<r2>)1/2 7.373