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

using model chemistry: QCISD/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 QCISD/6-31G**
 hartrees
Energy at 0K-154.588270
Energy at 298.15K-154.594987
HF Energy-154.073023
Nuclear repulsion energy83.893657
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 QCISD/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 3208 3020 33.35      
2 A1 3059 2880 53.41      
3 A1 1578 1486 0.00      
4 A1 1543 1453 0.03      
5 A1 1303 1227 6.58      
6 A1 976 919 31.71      
7 A1 426 401 2.53      
8 A2 3112 2930 0.00      
9 A2 1542 1451 0.00      
10 A2 1191 1121 0.00      
11 A2 211 199 0.00      
12 B1 3109 2927 145.15      
13 B1 1552 1461 6.62      
14 B1 1229 1157 9.42      
15 B1 261 246 6.76      
16 B2 3206 3018 34.79      
17 B2 3048 2869 50.83      
18 B2 1562 1470 10.05      
19 B2 1507 1419 15.98      
20 B2 1240 1168 113.09      
21 B2 1151 1084 22.07      

Unscaled Zero Point Vibrational Energy (zpe) 18007.4 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 16952.2 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 QCISD/6-31G**
ABC
1.29259 0.33645 0.29693

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.598
C2 0.000 1.168 -0.199
C3 0.000 -1.168 -0.199
H4 0.000 2.018 0.479
H5 0.000 -2.018 0.479
H6 0.889 1.218 -0.839
H7 -0.889 1.218 -0.839
H8 -0.889 -1.218 -0.839
H9 0.889 -1.218 -0.839

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7 H8 H9
O11.41401.41402.02202.02202.08322.08322.08322.0832
C21.41402.33551.08793.25751.09661.09662.62512.6251
C31.41402.33553.25751.08792.62512.62511.09661.0966
H42.02201.08793.25754.03691.78001.78003.60583.6058
H52.02203.25751.08794.03693.60583.60581.78001.7800
H62.08321.09662.62511.78003.60581.77833.01592.4358
H72.08321.09662.62511.78003.60581.77832.43583.0159
H82.08322.62511.09663.60581.78003.01592.43581.7783
H92.08322.62511.09663.60581.78002.43583.01591.7783

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 107.116 O1 C2 H6 111.522
O1 C2 H7 111.522 O1 C3 H5 107.116
O1 C3 H8 111.522 O1 C3 H9 111.522
C2 O1 C3 111.343 H4 C2 H6 109.141
H4 C2 H7 109.141 H5 C3 H8 109.141
H5 C3 H9 109.141 H6 C2 H7 108.351
H8 C3 H9 108.351
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability