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All results from a given calculation for C4H8O2 (Ethyl acetate)

using model chemistry: PBE1PBE/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBE1PBE/STO-3G
 hartrees
Energy at 0K-303.417540
Energy at 298.15K 
HF Energy-303.417540
Nuclear repulsion energy238.543772
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 PBE1PBE/STO-3G
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' 3552 3133 0.59 31.57 0.74 0.85
2 A' 3543 3125 0.04 35.04 0.73 0.84
3 A' 3368 2971 0.25 42.41 0.01 0.02
4 A' 3361 2965 1.94 45.02 0.00 0.00
5 A' 3334 2941 3.94 34.34 0.11 0.19
6 A' 1926 1699 76.82 1.70 0.30 0.46
7 A' 1698 1498 4.66 6.00 0.75 0.86
8 A' 1669 1472 4.26 21.08 0.74 0.85
9 A' 1667 1471 9.24 13.82 0.75 0.85
10 A' 1582 1396 2.80 7.43 0.65 0.79
11 A' 1545 1363 8.64 5.78 0.64 0.78
12 A' 1491 1315 10.61 1.72 0.72 0.84
13 A' 1341 1183 261.06 0.60 0.72 0.84
14 A' 1243 1096 8.09 5.12 0.21 0.34
15 A' 1177 1038 5.38 4.51 0.74 0.85
16 A' 1078 951 9.63 1.25 0.33 0.50
17 A' 1002 884 3.01 2.70 0.74 0.85
18 A' 920 811 3.43 6.86 0.19 0.32
19 A' 624 551 6.88 7.19 0.37 0.54
20 A' 413 364 0.31 0.28 0.72 0.84
21 A' 362 319 5.33 2.65 0.40 0.57
22 A' 191 168 2.65 0.16 0.55 0.71
23 A" 3547 3128 0.21 22.09 0.75 0.86
24 A" 3529 3113 0.44 29.70 0.75 0.86
25 A" 3437 3032 3.60 26.28 0.75 0.86
26 A" 1682 1484 3.93 17.69 0.75 0.86
27 A" 1666 1469 5.45 16.45 0.75 0.86
28 A" 1369 1207 0.02 12.55 0.75 0.86
29 A" 1234 1089 5.87 3.15 0.75 0.86
30 A" 1116 984 8.12 0.76 0.75 0.86
31 A" 868 766 1.86 0.04 0.75 0.86
32 A" 559 493 2.50 0.89 0.75 0.86
33 A" 230 203 1.02 0.01 0.75 0.86
34 A" 150 132 2.55 0.01 0.75 0.86
35 A" 54 48 0.02 0.20 0.75 0.86
36 A" 40 35 0.12 0.24 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 28282.4 cm-1
Scaled (by 0.8821) Zero Point Vibrational Energy (zpe) 24947.9 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 PBE1PBE/STO-3G
ABC
0.26668 0.06769 0.05570

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.368 0.109 0.000
C2 -0.943 -0.496 0.000
O3 0.000 0.561 0.000
O4 -0.633 -1.701 0.000
C5 1.368 0.018 0.000
C6 2.342 1.214 0.000
H7 -3.108 -0.700 0.000
H8 -2.514 0.735 0.890
H9 -2.514 0.735 -0.890
H10 1.528 -0.619 0.893
H11 1.528 -0.619 -0.893
H12 3.377 0.848 0.000
H13 2.188 1.835 -0.891
H14 2.188 1.835 0.891

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.54762.41062.50643.73694.83771.09651.09841.09844.06304.06305.79204.95284.9528
C21.54761.41661.24382.36783.70352.17452.18542.18542.63092.63094.52434.00404.0040
O32.41061.41662.34841.47162.43133.35422.67282.67282.12732.12733.38902.68422.6842
O42.50641.24382.34842.63824.16482.66943.20353.20352.57702.57704.75144.61014.6101
C53.73692.36781.47162.63821.54194.53344.04684.04681.10891.10892.17342.18312.1831
C64.83773.70352.43134.16481.54195.77644.96024.96022.19512.19511.09761.09721.0972
H71.09652.17453.35422.66944.53345.77641.79041.79044.72254.72256.66725.93895.9389
H81.09842.18542.67283.20354.04684.96021.79041.78084.26324.62125.95895.14734.8290
H91.09842.18542.67283.20354.04684.96021.79041.78084.62124.26325.95894.82905.1473
H104.06302.63092.12732.57701.10892.19514.72254.26324.62121.78632.52313.10492.5408
H114.06302.63092.12732.57701.10892.19514.72254.62124.26321.78632.52312.54083.1049
H125.79204.52433.38904.75142.17341.09766.66725.95895.95892.52312.52311.78381.7838
H134.95284.00402.68424.61012.18311.09725.93895.14734.82903.10492.54081.78381.7828
H144.95284.00402.68424.61012.18311.09725.93894.82905.14732.54083.10491.78381.7828

picture of Ethyl acetate state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 108.746 C1 C2 O4 127.432
C2 C1 H7 109.461 C2 C1 H8 110.206
C2 C1 H9 110.206 C2 O3 C5 110.120
O3 C2 O4 123.822 O3 C5 C6 107.547
O3 C5 H10 110.262 O3 C5 H11 110.262
C5 C6 H12 109.703 C5 C6 H13 110.494
C5 C6 H14 110.494 C6 C5 H10 110.742
C6 C5 H11 110.742 H7 C1 H8 109.315
H7 C1 H9 109.315 H8 C1 H9 108.315
H10 C5 H11 107.309 H12 C6 H13 108.720
H12 C6 H14 108.720 H13 C6 H14 108.663
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.257      
2 C 0.212      
3 O -0.177      
4 O -0.219      
5 C -0.050      
6 C -0.238      
7 H 0.097      
8 H 0.097      
9 H 0.097      
10 H 0.088      
11 H 0.088      
12 H 0.087      
13 H 0.088      
14 H 0.088      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.372 1.077 0.000 1.139
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.483 -0.772 0.000
y -0.772 -37.814 0.000
z 0.000 0.000 -32.720
Traceless
 xyz
x 5.784 -0.772 0.000
y -0.772 -6.712 0.000
z 0.000 0.000 0.928
Polar
3z2-r21.856
x2-y28.331
xy-0.772
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.191 0.369 0.000
y 0.369 4.154 0.000
z 0.000 0.000 2.695


<r2> (average value of r2) Å2
<r2> 205.698
(<r2>)1/2 14.342