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: B1B95/daug-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 B1B95/daug-cc-pVDZ
 hartrees
Energy at 0K-154.963548
Energy at 298.15K-154.970167
HF Energy-154.963548
Nuclear repulsion energy84.127294
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 B1B95/daug-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 3155 3155 22.25 100.77 0.31 0.48
2 A1 3003 3003 64.27 340.02 0.02 0.03
3 A1 1488 1488 4.15 4.81 0.72 0.84
4 A1 1456 1456 0.11 3.48 0.73 0.85
5 A1 1256 1256 7.44 0.41 0.73 0.85
6 A1 971 971 35.85 7.89 0.33 0.49
7 A1 402 402 2.32 1.11 0.12 0.21
8 A2 3058 3058 0.00 19.41 0.75 0.86
9 A2 1455 1455 0.00 12.29 0.75 0.86
10 A2 1149 1149 0.00 1.64 0.75 0.86
11 A2 197 197 0.00 0.19 0.75 0.86
12 B1 3052 3052 127.04 105.07 0.75 0.86
13 B1 1464 1464 15.32 0.06 0.75 0.86
14 B1 1178 1178 7.17 0.01 0.75 0.86
15 B1 231 231 4.99 0.01 0.75 0.86
16 B2 3155 3155 29.09 67.66 0.75 0.86
17 B2 2992 2992 62.87 1.61 0.75 0.86
18 B2 1469 1469 13.37 1.46 0.75 0.86
19 B2 1427 1427 0.91 1.70 0.75 0.86
20 B2 1219 1219 128.44 0.86 0.75 0.86
21 B2 1121 1121 16.55 1.09 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17448.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 17448.6 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 B1B95/daug-cc-pVDZ
ABC
1.30988 0.33769 0.29918

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/daug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.589
C2 0.000 1.164 -0.195
C3 0.000 -1.164 -0.195
H4 0.000 2.019 0.486
H5 0.000 -2.019 0.486
H6 0.894 1.216 -0.837
H7 -0.894 1.216 -0.837
H8 -0.894 -1.216 -0.837
H9 0.894 -1.216 -0.837

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7 H8 H9
O11.40361.40362.02192.02192.07662.07662.07662.0766
C21.40362.32811.09303.25531.10191.10192.62222.6222
C31.40362.32813.25531.09302.62222.62221.10191.1019
H42.02191.09303.25534.03851.78721.78723.60763.6076
H52.02193.25531.09304.03853.60763.60761.78721.7872
H62.07661.10192.62221.78723.60761.78793.01842.4318
H72.07661.10192.62221.78723.60761.78792.43183.0184
H82.07662.62221.10193.60761.78723.01842.43181.7879
H92.07662.62221.10193.60761.78722.43183.01841.7879

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 107.508 O1 C2 H6 111.385
O1 C2 H7 111.385 O1 C3 H5 107.508
O1 C3 H8 111.385 O1 C3 H9 111.385
C2 O1 C3 112.056 H4 C2 H6 109.030
H4 C2 H7 109.030 H5 C3 H8 109.030
H5 C3 H9 109.030 H6 C2 H7 108.452
H8 C3 H9 108.452
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/daug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.577      
2 C 1.223      
3 C 1.223      
4 H -0.324      
5 H -0.324      
6 H -0.305      
7 H -0.305      
8 H -0.305      
9 H -0.305      


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 -1.244 1.244
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.265 0.000 0.000
y 0.000 -17.511 0.000
z 0.000 0.000 -21.409
Traceless
 xyz
x -0.806 0.000 0.000
y 0.000 3.326 0.000
z 0.000 0.000 -2.520
Polar
3z2-r2-5.041
x2-y2-2.754
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.673 0.000 0.000
y 0.000 5.763 0.000
z 0.000 0.000 4.748


<r2> (average value of r2) Å2
<r2> 52.357
(<r2>)1/2 7.236