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 CH3OC2H5 (Ethane, methoxy-)

using model chemistry: MP2/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31+G**
 hartrees
Energy at 0K-193.750598
Energy at 298.15K-193.759579
HF Energy-193.120644
Nuclear repulsion energy133.500864
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 MP2/6-31+G**
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' 3238 3046 24.65      
2 A' 3223 3031 22.09      
3 A' 3127 2942 17.14      
4 A' 3073 2891 79.65      
5 A' 3057 2875 45.97      
6 A' 1574 1480 0.43      
7 A' 1554 1462 5.09      
8 A' 1546 1454 4.84      
9 A' 1512 1423 0.00      
10 A' 1467 1380 32.92      
11 A' 1428 1343 8.25      
12 A' 1256 1182 39.65      
13 A' 1179 1109 125.31      
14 A' 1141 1073 5.47      
15 A' 1057 995 20.91      
16 A' 883 830 15.09      
17 A' 471 443 0.63      
18 A' 293 276 3.01      
19 A" 3237 3044 22.25      
20 A" 3146 2959 50.51      
21 A" 3104 2920 63.26      
22 A" 1535 1444 6.41      
23 A" 1528 1437 5.63      
24 A" 1318 1240 1.51      
25 A" 1221 1148 11.35      
26 A" 1186 1115 0.14      
27 A" 841 791 0.05      
28 A" 268 252 2.16      
29 A" 215 202 2.23      
30 A" 105 98 3.32      

Unscaled Zero Point Vibrational Energy (zpe) 24390.9 cm-1
Scaled (by 0.9406) Zero Point Vibrational Energy (zpe) 22942.0 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 MP2/6-31+G**
ABC
0.93616 0.13875 0.12969

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.324 1.238 0.000
O2 0.003 0.717 0.000
C3 0.000 -0.707 0.000
C4 -1.438 -1.175 0.000
H5 1.236 2.321 0.000
H6 1.874 0.917 0.891
H7 1.874 0.917 -0.891
H8 0.532 -1.077 -0.887
H9 0.532 -1.077 0.887
H10 -1.480 -2.265 0.000
H11 -1.953 -0.805 0.884
H12 -1.953 -0.805 -0.884

Atom - Atom Distances (Å)
  C1 O2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C11.42002.35343.66741.08661.09501.09502.60232.60234.48673.96193.9619
O21.42001.42442.37802.02342.08162.08162.06942.06943.32992.63172.6317
C32.35341.42441.51173.27132.63512.63511.09771.09772.14822.14642.1464
C43.66742.37801.51174.40144.01694.01692.16202.16201.09041.08851.0885
H51.08662.02343.27134.40141.78101.78103.58163.58165.32974.55274.5527
H61.09502.08162.63514.01691.78101.78162.98912.40334.70784.19664.5567
H71.09502.08162.63514.01691.78101.78162.40332.98914.70784.55674.1966
H82.60232.06941.09772.16203.58162.98912.40331.77302.49883.06352.4998
H92.60232.06941.09772.16203.58162.40332.98911.77302.49882.49983.0635
H104.48673.32992.14821.09045.32974.70784.70782.49882.49881.77101.7710
H113.96192.63172.14641.08854.55274.19664.55673.06352.49981.77101.7689
H123.96192.63172.14641.08854.55274.55674.19662.49983.06351.77101.7689

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 111.661 O2 C1 H5 106.900
O2 C1 H6 111.065 O2 C1 H7 111.065
O2 C3 C4 108.134 O2 C3 H8 109.587
O2 C3 H9 109.587 C3 C4 H10 110.235
C3 C4 H11 110.204 C3 C4 H12 110.204
C4 C3 H8 110.898 C4 C3 H9 110.898
H5 C1 H6 109.446 H5 C1 H7 109.446
H6 C1 H7 108.885 H8 C3 H9 107.729
H10 C4 H11 108.735 H10 C4 H12 108.735
H11 C4 H12 108.683
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability