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All results from a given calculation for CH3OC2H5 (Ethane, methoxy-)

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 CS 1A'
Energy calculated at QCISD/6-31G
 hartrees
Energy at 0K-193.461750
Energy at 298.15K-193.470619
HF Energy-193.014983
Nuclear repulsion energy130.662790
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 A' 3125 3011 28.55      
2 A' 3094 2982 31.41      
3 A' 3020 2910 18.67      
4 A' 2976 2868 58.10      
5 A' 2960 2853 33.04      
6 A' 1579 1522 0.63      
7 A' 1554 1498 3.34      
8 A' 1550 1494 8.49      
9 A' 1500 1446 0.46      
10 A' 1470 1416 12.11      
11 A' 1433 1381 26.54      
12 A' 1223 1179 19.78      
13 A' 1131 1090 10.10      
14 A' 1095 1055 82.75      
15 A' 1013 976 16.31      
16 A' 825 795 12.71      
17 A' 457 440 1.13      
18 A' 279 268 4.23      
19 A" 3109 2996 33.28      
20 A" 3030 2919 66.83      
21 A" 2992 2883 62.33      
22 A" 1537 1481 4.56      
23 A" 1534 1478 5.20      
24 A" 1312 1264 0.04      
25 A" 1207 1163 10.31      
26 A" 1158 1116 0.31      
27 A" 850 819 0.30      
28 A" 254 245 2.88      
29 A" 199 192 2.33      
30 A" 107 103 5.15      

Unscaled Zero Point Vibrational Energy (zpe) 23786.8 cm-1
Scaled (by 0.9636) Zero Point Vibrational Energy (zpe) 22921.0 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
0.89973 0.13241 0.12365

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.344 1.298 0.000
O2 0.000 0.719 0.000
C3 0.006 -0.750 0.000
C4 -1.457 -1.205 0.000
H5 1.202 2.386 0.000
H6 1.910 0.995 0.901
H7 1.910 0.995 -0.901
H8 0.543 -1.120 -0.896
H9 0.543 -1.120 0.896
H10 -1.521 -2.307 0.000
H11 -1.972 -0.819 0.893
H12 -1.972 -0.819 -0.893

Atom - Atom Distances (Å)
  C1 O2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C11.46382.44663.75711.09731.10601.10602.70052.70054.60454.03484.0348
O21.46381.46872.41372.05582.12952.12952.11652.11653.38602.65572.6557
C32.44661.46871.53243.35672.73492.73491.10821.10822.18022.17152.1715
C43.75712.41371.53244.46924.12174.12172.19352.19351.10311.10101.1010
H51.09732.05583.35674.46921.80241.80243.67873.67875.42564.59894.5989
H61.10602.12952.73494.12171.80241.80133.09302.51804.84534.28494.6452
H71.10602.12952.73494.12171.80241.80132.51803.09304.84534.64524.2849
H82.70052.11651.10822.19353.67873.09302.51801.79132.54343.10142.5335
H92.70052.11651.10822.19353.67872.51803.09301.79132.54342.53353.1014
H104.60453.38602.18021.10315.42564.84534.84532.54342.54341.79291.7929
H114.03482.65572.17151.10104.59894.28494.64523.10142.53351.79291.7864
H124.03482.65572.17151.10104.59894.64524.28492.53353.10141.79291.7864

picture of Ethane, methoxy- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 C3 113.090 O2 C1 H5 105.888
O2 C1 H6 111.159 O2 C1 H7 111.159
O2 C3 C4 107.060 O2 C3 H8 109.638
O2 C3 H9 109.638 C3 C4 H10 110.574
C3 C4 H11 110.021 C3 C4 H12 110.021
C4 C3 H8 111.328 C4 C3 H9 111.328
H5 C1 H6 109.776 H5 C1 H7 109.776
H6 C1 H7 109.041 H8 C3 H9 107.842
H10 C4 H11 108.870 H10 C4 H12 108.870
H11 C4 H12 108.439
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability