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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-154.538618
Energy at 298.15K-154.545336
HF Energy-154.062974
Nuclear repulsion energy83.688864
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
4/u)
Dep P Dep U
1 A1 3164 3013 30.11      
2 A1 3021 2877 50.81      
3 A1 1567 1493 0.27      
4 A1 1534 1461 0.00      
5 A1 1297 1236 5.00      
6 A1 973 927 33.10      
7 A1 429 409 2.90      
8 A2 3069 2922 0.00      
9 A2 1532 1459 0.00      
10 A2 1185 1129 0.00      
11 A2 217 206 0.00      
12 B1 3066 2920 138.06      
13 B1 1543 1469 9.19      
14 B1 1224 1165 7.23      
15 B1 265 252 7.32      
16 B2 3162 3012 33.02      
17 B2 3009 2866 46.35      
18 B2 1550 1476 11.70      
19 B2 1500 1429 9.59      
20 B2 1237 1178 109.57      
21 B2 1147 1093 22.22      

Unscaled Zero Point Vibrational Energy (zpe) 17845.8 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 16994.5 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 QCISD/6-31G*
ABC
1.28541 0.33517 0.29598

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 0.591
C2 0.000 1.169 -0.196
C3 0.000 -1.169 -0.196
H4 0.000 2.021 0.492
H5 0.000 -2.021 0.492
H6 0.894 1.230 -0.840
H7 -0.894 1.230 -0.840
H8 -0.894 -1.230 -0.840
H9 0.894 -1.230 -0.840

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7 H8 H9
O11.40971.40972.02312.02312.08902.08902.08902.0890
C21.40972.33821.09453.26301.10391.10392.64052.6405
C31.40972.33823.26301.09452.64052.64051.10391.1039
H42.02311.09453.26304.04121.78831.78833.62533.6253
H52.02313.26301.09454.04123.62533.62531.78831.7883
H62.08901.10392.64051.78833.62531.78843.04212.4608
H72.08901.10392.64051.78833.62531.78842.46083.0421
H82.08902.64051.10393.62531.78833.04212.46081.7884
H92.08902.64051.10393.62531.78832.46083.04211.7884

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 107.110 O1 C2 H6 111.850
O1 C2 H7 111.850 O1 C3 H5 107.110
O1 C3 H8 111.850 O1 C3 H9 111.850
C2 O1 C3 112.067 H4 C2 H6 108.876
H4 C2 H7 108.876 H5 C3 H8 108.876
H5 C3 H9 108.876 H6 C2 H7 108.206
H8 C3 H9 108.206
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability