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

using model chemistry: HF/6-31G(2df,p)

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(2df,p)
 hartrees
Energy at 0K-305.911024
Energy at 298.15K 
HF Energy-305.911024
Nuclear repulsion energy246.015568
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(2df,p)
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' 3306 2993 13.07 62.05 0.67 0.80
2 A' 3250 2943 41.30 63.87 0.67 0.81
3 A' 3213 2909 15.08 93.44 0.13 0.23
4 A' 3195 2893 4.32 107.80 0.01 0.02
5 A' 3178 2877 21.53 96.11 0.01 0.03
6 A' 2000 1811 325.72 3.58 0.57 0.72
7 A' 1650 1494 4.11 2.14 0.75 0.86
8 A' 1616 1463 1.96 16.11 0.74 0.85
9 A' 1586 1436 14.22 11.17 0.75 0.86
10 A' 1566 1418 7.02 2.34 0.43 0.60
11 A' 1536 1391 100.25 1.73 0.75 0.86
12 A' 1515 1372 10.55 0.80 0.44 0.61
13 A' 1412 1279 492.99 0.83 0.74 0.85
14 A' 1238 1121 43.17 7.00 0.13 0.22
15 A' 1182 1070 77.06 3.22 0.58 0.73
16 A' 1095 992 2.93 2.63 0.23 0.37
17 A' 1020 923 3.10 2.10 0.41 0.58
18 A' 943 854 10.32 8.65 0.31 0.48
19 A' 689 624 12.01 7.06 0.28 0.43
20 A' 457 414 1.20 0.24 0.70 0.82
21 A' 396 359 11.15 2.04 0.24 0.38
22 A' 205 186 5.79 0.22 0.63 0.77
23 A" 3270 2961 61.70 2.22 0.75 0.86
24 A" 3261 2953 9.35 55.56 0.75 0.86
25 A" 3242 2936 0.86 99.41 0.75 0.86
26 A" 1602 1451 4.14 13.76 0.75 0.86
27 A" 1596 1445 5.44 12.56 0.75 0.86
28 A" 1410 1277 1.76 7.97 0.75 0.86
29 A" 1289 1168 5.21 0.72 0.75 0.86
30 A" 1172 1062 9.46 0.45 0.75 0.86
31 A" 869 787 0.06 0.19 0.75 0.86
32 A" 671 607 11.44 1.08 0.75 0.86
33 A" 282 256 0.99 0.01 0.75 0.86
34 A" 157 142 4.70 0.01 0.75 0.86
35 A" 97 88 0.04 0.08 0.75 0.86
36 A" 74 67 0.73 0.07 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 27619.5 cm-1
Scaled (by 0.9055) Zero Point Vibrational Energy (zpe) 25009.4 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(2df,p)
ABC
0.28786 0.07071 0.05860

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.293 -0.009 0.000
C2 -0.884 -0.538 0.000
O3 0.000 0.446 0.000
O4 -0.590 -1.683 0.000
C5 1.374 0.089 0.000
C6 2.182 1.370 0.000
H7 -2.989 -0.835 0.000
H8 -2.449 0.612 0.875
H9 -2.449 0.612 -0.875
H10 1.584 -0.514 0.875
H11 1.584 -0.514 -0.875
H12 3.242 1.136 0.000
H13 1.960 1.965 -0.880
H14 1.960 1.965 0.880

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50532.33782.38813.66864.68241.08011.08431.08434.00684.00685.65194.77094.7709
C21.50531.32231.18262.34323.61032.12642.13042.13042.61852.61854.45183.88893.8889
O32.33781.32232.20961.41982.36923.25212.60622.60622.04872.04873.31422.63112.6311
O42.38811.18262.20962.64574.12362.54463.08063.08062.61922.61924.75714.53714.5371
C53.66862.34321.41982.64571.51404.46013.95703.95701.08301.08302.14082.15282.1528
C64.68243.61032.36924.12361.51405.62134.77354.77352.16122.16121.08551.08471.0847
H71.08012.12643.25212.54464.46015.62131.77501.77504.66744.66746.53515.75415.7541
H81.08432.13042.60623.08063.95704.77351.77501.75034.18784.53875.78164.93514.6125
H91.08432.13042.60623.08063.95704.77351.77501.75034.53874.18785.78164.61254.9351
H104.00682.61852.04872.61921.08302.16124.66744.18784.53871.74922.49683.05992.5069
H114.00682.61852.04872.61921.08302.16124.66744.53874.18781.74922.49682.50693.0599
H125.65194.45183.31424.75712.14081.08556.53515.78165.78162.49682.49681.76131.7613
H134.77093.88892.63114.53712.15281.08475.75414.93514.61253.05992.50691.76131.7596
H144.77093.88892.63114.53712.15281.08475.75414.61254.93512.50693.05991.76131.7596

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 111.373 C1 C2 O4 124.928
C2 C1 H7 109.565 C2 C1 H8 109.628
C2 C1 H9 109.628 C2 O3 C5 117.368
O3 C2 O4 123.700 O3 C5 C6 107.672
O3 C5 H10 109.140 O3 C5 H11 109.140
C5 C6 H12 109.789 C5 C6 H13 110.790
C5 C6 H14 110.790 C6 C5 H10 111.571
C6 C5 H11 111.571 H7 C1 H8 110.184
H7 C1 H9 110.184 H8 C1 H9 107.623
H10 C5 H11 107.708 H12 C6 H13 108.499
H12 C6 H14 108.499 H13 C6 H14 108.405
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.484      
2 C 0.571      
3 O -0.428      
4 O -0.462      
5 C -0.006      
6 C -0.418      
7 H 0.173      
8 H 0.167      
9 H 0.167      
10 H 0.143      
11 H 0.143      
12 H 0.140      
13 H 0.146      
14 H 0.146      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.205 2.090 0.000 2.100
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.358 -1.003 0.000
y -1.003 -42.787 0.000
z 0.000 0.000 -35.104
Traceless
 xyz
x 8.588 -1.003 0.000
y -1.003 -10.056 0.000
z 0.000 0.000 1.468
Polar
3z2-r22.936
x2-y212.429
xy-1.003
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.996 0.403 0.000
y 0.403 7.109 0.000
z 0.000 0.000 5.734


<r2> (average value of r2) Å2
<r2> 198.487
(<r2>)1/2 14.089