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

using model chemistry: CCSD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCSD/6-31G(2df,p)
 hartrees
Energy at 0K-154.675422
Energy at 298.15K-154.682162
Nuclear repulsion energy 
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 CCSD/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 3176 3003 22.87      
2 A1 3039 2874 41.78      
3 A1 1556 1471 0.98      
4 A1 1528 1445 0.02      
5 A1 1305 1234 6.14      
6 A1 985 932 29.96      
7 A1 430 407 2.54      
8 A2 3088 2920 0.00      
9 A2 1518 1435 0.00      
10 A2 1192 1127 0.00      
11 A2 216 204 0.00      
12 B1 3085 2917 109.53      
13 B1 1529 1445 10.03      
14 B1 1228 1161 6.91      
15 B1 267 252 5.69      
16 B2 3174 3001 27.04      
17 B2 3029 2864 42.25      
18 B2 1536 1452 11.17      
19 B2 1494 1413 6.56      
20 B2 1245 1177 109.24      
21 B2 1154 1091 21.44      

Unscaled Zero Point Vibrational Energy (zpe) 17887.3 cm-1
Scaled (by 0.9455) Zero Point Vibrational Energy (zpe) 16912.4 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 CCSD/6-31G(2df,p)
ABC
1.29806 0.33998 0.30003

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.592
C2 0.000 1.159 -0.195
C3 0.000 -1.159 -0.195
H4 0.000 2.014 0.481
H5 0.000 -2.014 0.481
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
O11.40151.40152.01722.01722.07912.07912.07912.0791
C21.40152.31821.09063.24471.09931.09932.61832.6183
C31.40152.31823.24471.09062.61832.61831.09931.0993
H42.01721.09063.24474.02831.78001.78003.60293.6029
H52.01723.24471.09064.02833.60293.60291.78001.7800
H62.07911.09932.61831.78003.60291.77893.01632.4358
H72.07911.09932.61831.78003.60291.77892.43583.0163
H82.07912.61831.09933.60291.78003.01632.43581.7789
H92.07912.61831.09933.60291.78002.43583.01631.7789

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 107.430 O1 C2 H6 111.913
O1 C2 H7 111.913 O1 C3 H5 107.430
O1 C3 H8 111.913 O1 C3 H9 111.913
C2 O1 C3 111.599 H4 C2 H6 108.743
H4 C2 H7 108.743 H5 C3 H8 108.743
H5 C3 H9 108.743 H6 C2 H7 108.016
H8 C3 H9 108.016
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability