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

using model chemistry: HF/CEP-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 HF/CEP-31G
 hartrees
Energy at 0K-30.071096
Energy at 298.15K-30.077759
Nuclear repulsion energy49.717059
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 HF/CEP-31G
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 3349 3018 76.50      
2 A1 3195 2880 98.49      
3 A1 1647 1485 1.88      
4 A1 1618 1459 0.08      
5 A1 1360 1225 3.17      
6 A1 971 875 39.47      
7 A1 406 366 4.83      
8 A2 3257 2936 0.00      
9 A2 1626 1466 0.00      
10 A2 1247 1124 0.00      
11 A2 193 174 0.00      
12 B1 3261 2939 262.76      
13 B1 1637 1475 16.67      
14 B1 1275 1150 11.05      
15 B1 233 210 12.79      
16 B2 3344 3014 62.01      
17 B2 3183 2869 85.04      
18 B2 1634 1473 14.50      
19 B2 1589 1432 7.09      
20 B2 1300 1172 127.66      
21 B2 1188 1071 42.71      

Unscaled Zero Point Vibrational Energy (zpe) 18756.1 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 16906.8 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 HF/CEP-31G
ABC
1.35173 0.31609 0.28373

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.590
C2 0.000 1.212 -0.174
C3 0.000 -1.212 -0.174
H4 0.000 2.031 0.535
H5 0.000 -2.031 0.535
H6 0.890 1.277 -0.804
H7 -0.890 1.277 -0.804
H8 -0.890 -1.277 -0.804
H9 0.890 -1.277 -0.804

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7 H8 H9
O11.43281.43282.03212.03212.08982.08982.08982.0898
C21.43282.42391.08343.31981.09261.09262.71702.7170
C31.43282.42393.31981.08342.71702.71701.09261.0926
H42.03211.08343.31984.06261.77641.77643.67803.6780
H52.03213.31981.08344.06263.67803.67801.77641.7764
H62.08981.09262.71701.77643.67801.78033.11242.5530
H72.08981.09262.71701.77643.67801.78032.55303.1124
H82.08982.71701.09263.67801.77643.11242.55301.7803
H92.08982.71701.09263.67801.77642.55303.11241.7803

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 106.899 O1 C2 H6 110.962
O1 C2 H7 110.962 O1 C3 H5 106.899
O1 C3 H8 110.962 O1 C3 H9 110.962
C2 O1 C3 115.522 H4 C2 H6 109.435
H4 C2 H7 109.435 H5 C3 H8 109.435
H5 C3 H9 109.435 H6 C2 H7 109.107
H8 C3 H9 109.107
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.404      
2 C -0.207      
3 C -0.207      
4 H 0.176      
5 H 0.176      
6 H 0.116      
7 H 0.116      
8 H 0.116      
9 H 0.116      


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 -2.157 2.157
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.935 0.000 0.000
y 0.000 -16.249 0.000
z 0.000 0.000 -21.737
Traceless
 xyz
x -0.942 0.000 0.000
y 0.000 4.587 0.000
z 0.000 0.000 -3.645
Polar
3z2-r2-7.290
x2-y2-3.686
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.091 0.000 0.000
y 0.000 3.923 0.000
z 0.000 0.000 3.056


<r2> (average value of r2) Å2
<r2> 47.242
(<r2>)1/2 6.873