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

using model chemistry: QCISD/3-21G

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/3-21G
 hartrees
Energy at 0K-153.548596
Energy at 298.15K-153.555275
HF Energy-153.210301
Nuclear repulsion energy81.710302
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/3-21G
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 3109 3013 29.36      
2 A1 2981 2889 39.32      
3 A1 1599 1549 0.01      
4 A1 1535 1488 0.39      
5 A1 1257 1218 0.06      
6 A1 872 845 15.77      
7 A1 406 394 3.87      
8 A2 3015 2922 0.00      
9 A2 1561 1513 0.00      
10 A2 1160 1124 0.00      
11 A2 242 235 0.00      
12 B1 3014 2921 134.38      
13 B1 1568 1520 9.79      
14 B1 1194 1157 3.78      
15 B1 246 238 8.19      
16 B2 3105 3010 26.90      
17 B2 2973 2882 33.85      
18 B2 1586 1537 11.77      
19 B2 1494 1448 15.21      
20 B2 1162 1126 39.17      
21 B2 1081 1048 39.79      

Unscaled Zero Point Vibrational Energy (zpe) 17579.2 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 17037.7 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/3-21G
ABC
1.22149 0.31780 0.27918

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.623
C2 0.000 1.206 -0.211
C3 0.000 -1.206 -0.211
H4 0.000 2.055 0.482
H5 0.000 -2.055 0.482
H6 0.895 1.257 -0.855
H7 -0.895 1.257 -0.855
H8 -0.895 -1.257 -0.855
H9 0.895 -1.257 -0.855

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7 H8 H9
O11.46681.46682.06002.06002.13722.13722.13722.1372
C21.46682.41261.09583.33431.10391.10392.69932.6993
C31.46682.41263.33431.09582.69932.69931.10391.1039
H42.06001.09583.33434.11031.79581.79583.68263.6826
H52.06003.33431.09584.11033.68263.68261.79581.7958
H62.13721.10392.69931.79583.68261.79073.08732.5149
H72.13721.10392.69931.79583.68261.79072.51493.0873
H82.13722.69931.10393.68261.79583.08732.51491.7907
H92.13722.69931.10393.68261.79582.51493.08731.7907

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 106.097 O1 C2 H6 111.703
O1 C2 H7 111.703 O1 C3 H5 106.097
O1 C3 H8 111.703 O1 C3 H9 111.703
C2 O1 C3 110.658 H4 C2 H6 109.447
H4 C2 H7 109.447 H5 C3 H8 109.447
H5 C3 H9 109.447 H6 C2 H7 108.400
H8 C3 H9 108.400
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability