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

using model chemistry: HF/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 HF/6-31G*
 hartrees
Energy at 0K-305.876629
Energy at 298.15K 
HF Energy-305.876629
Nuclear repulsion energy245.623510
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 HF/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' 3339 3001 13.23 67.79 0.67 0.80
2 A' 3283 2950 48.82 62.91 0.65 0.79
3 A' 3259 2928 11.13 102.11 0.18 0.31
4 A' 3230 2902 4.58 109.13 0.02 0.03
5 A' 3215 2889 22.93 99.60 0.02 0.04
6 A' 2015 1811 340.15 3.82 0.64 0.78
7 A' 1674 1504 2.76 2.59 0.75 0.86
8 A' 1643 1476 2.23 21.10 0.74 0.85
9 A' 1614 1450 13.71 14.05 0.75 0.86
10 A' 1589 1428 5.92 3.34 0.51 0.68
11 A' 1564 1405 96.26 3.00 0.75 0.86
12 A' 1539 1383 7.82 1.73 0.51 0.67
13 A' 1432 1287 527.12 0.86 0.75 0.85
14 A' 1250 1123 39.42 7.29 0.16 0.28
15 A' 1191 1070 81.42 3.56 0.67 0.80
16 A' 1109 996 3.70 2.99 0.30 0.46
17 A' 1028 924 3.87 2.28 0.45 0.62
18 A' 952 855 13.52 9.54 0.35 0.52
19 A' 691 621 12.87 7.63 0.31 0.47
20 A' 459 413 1.26 0.30 0.69 0.82
21 A' 397 357 11.67 2.19 0.28 0.44
22 A' 206 185 6.16 0.23 0.67 0.80
23 A" 3313 2977 62.34 8.56 0.75 0.86
24 A" 3294 2959 10.87 61.81 0.75 0.86
25 A" 3282 2949 5.76 102.13 0.75 0.86
26 A" 1630 1465 4.04 18.63 0.75 0.86
27 A" 1621 1456 6.10 16.64 0.75 0.86
28 A" 1426 1281 1.35 11.44 0.75 0.86
29 A" 1299 1167 6.10 1.08 0.75 0.86
30 A" 1182 1062 10.05 1.11 0.75 0.86
31 A" 881 792 0.00 0.23 0.75 0.86
32 A" 667 599 14.42 1.58 0.75 0.86
33 A" 284 255 1.16 0.01 0.75 0.86
34 A" 158 142 5.48 0.01 0.75 0.86
35 A" 97 87 0.06 0.14 0.75 0.86
36 A" 77 69 0.78 0.12 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 27944.9 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 25108.5 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 HF/6-31G*
ABC
0.28645 0.07054 0.05843

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.295 -0.014 0.000
C2 -0.885 -0.540 0.000
O3 0.000 0.447 0.000
O4 -0.586 -1.690 0.000
C5 1.379 0.092 0.000
C6 2.178 1.378 0.000
H7 -2.990 -0.841 0.000
H8 -2.454 0.605 0.875
H9 -2.454 0.605 -0.875
H10 1.588 -0.509 0.874
H11 1.588 -0.509 -0.874
H12 3.240 1.154 0.000
H13 1.953 1.971 -0.879
H14 1.953 1.971 0.879

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50482.34082.39343.67574.68511.07981.08391.08394.01104.01105.65674.77114.7711
C21.50481.32561.18842.35093.61442.12632.13092.13092.62342.62344.45903.89043.8904
O32.34081.32562.21611.42412.36913.25542.61052.61052.04942.04943.31612.62912.6291
O42.39341.18842.21612.65354.13032.54933.08633.08632.62482.62484.76734.54204.5420
C53.67572.35091.42412.65351.51414.46773.96563.96561.08141.08142.14202.15252.1525
C64.68513.61442.36914.13031.51415.62454.77764.77762.16182.16181.08521.08411.0841
H71.07982.12633.25542.54934.46775.62451.77301.77304.67274.67276.54125.75465.7546
H81.08392.13092.61053.08633.96564.77761.77301.74974.19344.54365.78724.93664.6145
H91.08392.13092.61053.08633.96564.77761.77301.74974.54364.19345.78724.61454.9366
H104.01102.62342.04942.62481.08142.16184.67274.19344.54361.74882.50113.05922.5067
H114.01102.62342.04942.62481.08142.16184.67274.54364.19341.74882.50112.50673.0592
H125.65674.45903.31614.76732.14201.08526.54125.78725.78722.50112.50111.75991.7599
H134.77113.89042.62914.54202.15251.08415.75464.93664.61453.05922.50671.75991.7584
H144.77113.89042.62914.54202.15251.08415.75464.61454.93662.50673.05921.75991.7584

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 111.435 C1 C2 O4 125.002
C2 C1 H7 109.613 C2 C1 H8 109.731
C2 C1 H9 109.731 C2 O3 C5 117.467
O3 C2 O4 123.563 O3 C5 C6 107.439
O3 C5 H10 108.999 O3 C5 H11 108.999
C5 C6 H12 109.895 C5 C6 H13 110.795
C5 C6 H14 110.795 C6 C5 H10 111.718
C6 C5 H11 111.718 H7 C1 H8 110.055
H7 C1 H9 110.055 H8 C1 H9 107.631
H10 C5 H11 107.914 H12 C6 H13 108.448
H12 C6 H14 108.448 H13 C6 H14 108.388
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.563      
2 C 0.760      
3 O -0.613      
4 O -0.566      
5 C -0.005      
6 C -0.497      
7 H 0.206      
8 H 0.199      
9 H 0.199      
10 H 0.180      
11 H 0.180      
12 H 0.168      
13 H 0.176      
14 H 0.176      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.235 2.121 0.000 2.134
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.297 -1.003 0.000
y -1.003 -43.445 0.000
z 0.000 0.000 -35.394
Traceless
 xyz
x 9.122 -1.003 0.000
y -1.003 -10.599 0.000
z 0.000 0.000 1.477
Polar
3z2-r22.953
x2-y213.148
xy-1.003
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.471 0.326 0.000
y 0.326 6.876 0.000
z 0.000 0.000 5.434


<r2> (average value of r2) Å2
<r2> 199.138
(<r2>)1/2 14.112