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

using model chemistry: CBS-Q

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CBS-Q
 hartrees
Energy at 0K-193.980312
Energy at 298.15K-193.973792
HF Energy-193.103072
Nuclear repulsion energy134.463087
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 CBS-Q
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3287 3287 48.68      
2 A' 3265 3265 44.82      
3 A' 3195 3195 21.79      
4 A' 3158 3158 95.21      
5 A' 3141 3141 27.10      
6 A' 1674 1674 0.72      
7 A' 1646 1646 5.46      
8 A' 1636 1636 2.52      
9 A' 1623 1623 0.18      
10 A' 1575 1575 47.97      
11 A' 1529 1529 6.66      
12 A' 1370 1370 76.37      
13 A' 1285 1285 166.87      
14 A' 1213 1213 7.84      
15 A' 1113 1113 17.34      
16 A' 945 945 12.87      
17 A' 497 497 0.68      
18 A' 309 309 2.94      
19 A" 3277 3277 48.63      
20 A" 3205 3205 94.99      
21 A" 3175 3175 63.38      
22 A" 1633 1633 4.34      
23 A" 1620 1620 2.75      
24 A" 1423 1423 2.83      
25 A" 1312 1312 13.49      
26 A" 1278 1278 0.05      
27 A" 882 882 0.00      
28 A" 284 284 2.97      
29 A" 227 227 2.27      
30 A" 122 122 3.40      

Unscaled Zero Point Vibrational Energy (zpe) 25449.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 25449.3 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 CBS-Q
ABC
0.93001 0.13950 0.13031

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.254 1.295 0.000
O2 0.000 0.693 0.000
C3 0.032 -0.702 0.000
C4 -1.394 -1.222 0.000
H5 1.102 2.369 0.000
H6 1.830 1.019 0.886
H7 1.830 1.019 -0.886
H8 0.571 -1.064 -0.880
H9 0.571 -1.064 0.880
H10 -1.405 -2.310 0.000
H11 -1.925 -0.870 0.881
H12 -1.925 -0.870 -0.881

Atom - Atom Distances (Å)
  C1 O2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C11.39052.34103.65291.08471.09191.09192.60812.60814.47933.94553.9455
O21.39051.39612.36872.00572.05872.05872.04632.04633.31582.63172.6317
C32.34101.39611.51823.25242.64172.64171.09311.09312.15662.15332.1533
C43.65292.36871.51824.37314.02484.02482.15922.15921.08851.08701.0870
H51.08472.00573.25244.37311.77081.77083.58313.58315.30854.52014.5201
H61.09192.05872.64174.02481.77081.77153.00642.43344.72574.20344.5595
H71.09192.05872.64174.02481.77081.77152.43343.00644.72574.55954.2034
H82.60812.04631.09312.15923.58313.00642.43341.75962.49683.06112.5041
H92.60812.04631.09312.15923.58312.43343.00641.75962.49682.50413.0611
H104.47933.31582.15661.08855.30854.72574.72572.49682.49681.76651.7665
H113.94552.63172.15331.08704.52014.20344.55953.06112.50411.76651.7615
H123.94552.63172.15331.08704.52014.55954.20342.50413.06111.76651.7615

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 114.301 O2 C1 H5 107.611
O2 C1 H6 111.494 O2 C1 H7 111.494
O2 C3 C4 108.663 O2 C3 H8 109.987
O2 C3 H9 109.987 C3 C4 H10 110.571
C3 C4 H11 110.395 C3 C4 H12 110.395
C4 C3 H8 110.502 C4 C3 H9 110.502
H5 C1 H6 108.882 H5 C1 H7 108.882
H6 C1 H7 108.416 H8 C3 H9 107.195
H10 C4 H11 108.583 H10 C4 H12 108.583
H11 C4 H12 108.246
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability