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: CCSD=FULL/aug-cc-pVTZ

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=FULL/aug-cc-pVTZ
 hartrees
Energy at 0K-154.820419
Energy at 298.15K-154.827105
HF Energy-154.129126
Nuclear repulsion energy84.404512
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=FULL/aug-cc-pVTZ
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 3147 2992 17.40      
2 A1 3026 2878 59.46      
3 A1 1547 1471 3.19      
4 A1 1517 1443 0.00      
5 A1 1298 1234 7.63      
6 A1 979 931 34.56      
7 A1 425 404 2.47      
8 A2 3057 2907 0.00      
9 A2 1521 1447 0.00      
10 A2 1190 1132 0.00      
11 A2 190 181 0.00      
12 B1 3052 2903 108.73      
13 B1 1533 1458 13.11      
14 B1 1225 1165 7.83      
15 B1 252 240 5.29      
16 B2 3143 2989 31.81      
17 B2 3017 2869 45.57      
18 B2 1530 1455 10.29      
19 B2 1482 1410 3.47      
20 B2 1241 1180 114.65      
21 B2 1148 1092 26.73      

Unscaled Zero Point Vibrational Energy (zpe) 17760.8 cm-1
Scaled (by 0.951) Zero Point Vibrational Energy (zpe) 16890.5 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=FULL/aug-cc-pVTZ
ABC
1.30963 0.34078 0.30112

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/aug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.589
C2 0.000 1.159 -0.195
C3 0.000 -1.159 -0.195
H4 0.000 2.012 0.478
H5 0.000 -2.012 0.478
H6 0.887 1.209 -0.833
H7 -0.887 1.209 -0.833
H8 -0.887 -1.209 -0.833
H9 0.887 -1.209 -0.833

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7 H8 H9
O11.39891.39892.01462.01462.06682.06682.06682.0668
C21.39892.31761.08593.24091.09441.09442.60812.6081
C31.39892.31763.24091.08592.60812.60811.09441.0944
H42.01461.08593.24094.02311.77471.77473.58863.5886
H52.01463.24091.08594.02313.58863.58861.77471.7747
H62.06681.09442.60811.77473.58861.77492.99972.4182
H72.06681.09442.60811.77473.58861.77492.41822.9997
H82.06682.60811.09443.58861.77472.99972.41821.7749
H92.06682.60811.09443.58861.77472.41822.99971.7749

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 107.680 O1 C2 H6 111.398
O1 C2 H7 111.398 O1 C3 H5 107.680
O1 C3 H8 111.398 O1 C3 H9 111.398
C2 O1 C3 111.869 H4 C2 H6 108.972
H4 C2 H7 108.972 H5 C3 H8 108.972
H5 C3 H9 108.972 H6 C2 H7 108.369
H8 C3 H9 108.369
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability