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

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 CS 1A'
Energy calculated at QCISD/3-21G*
 hartrees
Energy at 0K-192.475351
Energy at 298.15K-192.484265
HF Energy-192.034228
Nuclear repulsion energy130.832762
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 A' 3110 2989 23.73      
2 A' 3104 2983 29.28      
3 A' 3042 2924 12.82      
4 A' 2980 2864 59.41      
5 A' 2973 2858 17.57      
6 A' 1610 1548 0.58      
7 A' 1591 1529 6.82      
8 A' 1580 1519 6.50      
9 A' 1519 1460 2.12      
10 A' 1471 1414 8.56      
11 A' 1437 1381 35.75      
12 A' 1226 1179 19.80      
13 A' 1128 1084 3.32      
14 A' 1102 1059 83.89      
15 A' 985 947 4.47      
16 A' 834 801 8.85      
17 A' 452 435 1.35      
18 A' 275 264 4.11      
19 A" 3118 2997 25.49      
20 A" 3015 2897 65.76      
21 A" 3000 2883 54.44      
22 A" 1565 1504 6.03      
23 A" 1564 1503 2.69      
24 A" 1330 1279 0.00      
25 A" 1216 1169 8.27      
26 A" 1169 1123 0.02      
27 A" 865 832 0.55      
28 A" 261 251 3.29      
29 A" 213 205 0.67      
30 A" 114 110 4.59      

Unscaled Zero Point Vibrational Energy (zpe) 23924.5 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 22993.9 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
0.88713 0.13378 0.12454

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.365 1.259 0.000
O2 0.000 0.723 0.000
C3 0.003 -0.746 0.000
C4 -1.478 -1.173 0.000
H5 1.263 2.350 0.000
H6 1.928 0.943 0.895
H7 1.928 0.943 -0.895
H8 0.524 -1.134 -0.893
H9 0.524 -1.134 0.893
H10 -1.567 -2.268 0.000
H11 -1.972 -0.766 0.891
H12 -1.972 -0.766 -0.891

Atom - Atom Distances (Å)
  C1 O2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C11.46632.42393.74071.09611.10381.10382.68912.68914.58634.00434.0043
O21.46631.46952.40382.05982.13732.13732.12662.12663.37672.62752.6275
C32.42391.46951.54083.34312.71332.71331.10451.10452.18632.16712.1671
C43.74072.40381.54084.46354.10834.10832.19232.19231.09871.09731.0973
H51.09612.05983.34314.46351.79541.79543.67213.67215.41634.58014.5801
H61.10382.13732.71334.10831.79541.79063.07982.50724.82994.25874.6183
H71.10382.13732.71334.10831.79541.79062.50723.07984.82994.61834.2587
H82.68912.12661.10452.19233.67213.07982.50721.78642.54083.09062.5233
H92.68912.12661.10452.19233.67212.50723.07981.78642.54082.52333.0906
H104.58633.37672.18631.09875.41634.82994.82992.54082.54081.79231.7923
H114.00432.62752.16711.09734.58014.25874.61833.09062.52331.79231.7826
H124.00432.62752.16711.09734.58014.61834.25872.52333.09061.79231.7826

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 111.306 O2 C1 H5 106.094
O2 C1 H6 111.744 O2 C1 H7 111.744
O2 C3 C4 105.953 O2 C3 H8 110.621
O2 C3 H9 110.621 C3 C4 H10 110.734
C3 C4 H11 109.313 C3 C4 H12 109.313
C4 C3 H8 110.869 C4 C3 H9 110.869
H5 C1 H6 109.401 H5 C1 H7 109.401
H6 C1 H7 108.409 H8 C3 H9 107.934
H10 C4 H11 109.403 H10 C4 H12 109.403
H11 C4 H12 108.643
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability