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

using model chemistry: B3LYP/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 B3LYP/6-31G*
 hartrees
Energy at 0K-307.707437
Energy at 298.15K 
HF Energy-307.707437
Nuclear repulsion energy242.871462
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 B3LYP/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' 3182 3056 8.25 66.67 0.66 0.80
2 A' 3131 3007 26.50 74.14 0.71 0.83
3 A' 3072 2950 19.49 37.51 0.19 0.32
4 A' 3070 2948 0.25 157.89 0.02 0.04
5 A' 3060 2939 16.69 108.44 0.01 0.02
6 A' 1831 1759 228.45 3.19 0.36 0.53
7 A' 1547 1486 4.68 0.99 0.70 0.82
8 A' 1527 1467 2.26 24.13 0.75 0.86
9 A' 1501 1442 12.62 15.29 0.73 0.84
10 A' 1452 1394 4.88 6.46 0.72 0.84
11 A' 1427 1371 42.80 2.71 0.73 0.84
12 A' 1409 1354 10.57 3.91 0.63 0.77
13 A' 1286 1235 420.67 0.41 0.18 0.30
14 A' 1149 1103 17.87 6.17 0.17 0.30
15 A' 1083 1040 104.17 2.79 0.73 0.85
16 A' 1022 981 4.87 1.46 0.26 0.42
17 A' 953 915 5.26 1.77 0.23 0.37
18 A' 868 833 8.83 9.55 0.34 0.50
19 A' 639 614 6.16 7.96 0.33 0.49
20 A' 428 411 0.81 0.42 0.67 0.80
21 A' 369 354 9.53 2.83 0.32 0.48
22 A' 193 185 5.03 0.28 0.65 0.79
23 A" 3139 3015 42.23 18.45 0.75 0.86
24 A" 3132 3007 6.48 58.87 0.75 0.86
25 A" 3109 2986 7.12 89.11 0.75 0.86
26 A" 1517 1457 5.29 19.91 0.75 0.86
27 A" 1506 1446 7.85 17.03 0.75 0.86
28 A" 1307 1255 0.53 12.07 0.75 0.86
29 A" 1194 1146 4.51 1.74 0.75 0.86
30 A" 1077 1034 7.35 0.78 0.75 0.86
31 A" 818 786 0.61 0.19 0.75 0.86
32 A" 604 580 5.54 1.39 0.75 0.86
33 A" 268 258 0.99 0.01 0.75 0.86
34 A" 155 149 4.12 0.01 0.75 0.86
35 A" 66 63 0.00 0.35 0.75 0.86
36 A" 56 54 0.93 0.03 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 26073.0 cm-1
Scaled (by 0.9603) Zero Point Vibrational Energy (zpe) 25037.9 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 B3LYP/6-31G*
ABC
0.27920 0.06937 0.05735

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.316 0.026 0.000
C2 -0.908 -0.525 0.000
O3 0.000 0.478 0.000
O4 -0.611 -1.700 0.000
C5 1.387 0.071 0.000
C6 2.231 1.332 0.000
H7 -3.028 -0.799 0.000
H8 -2.474 0.655 0.882
H9 -2.474 0.655 -0.882
H10 1.573 -0.550 0.883
H11 1.573 -0.550 -0.883
H12 3.294 1.067 0.000
H13 2.028 1.939 -0.888
H14 2.028 1.939 0.888

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.51152.35942.42583.70314.73081.09051.09511.09514.02924.02925.70594.82844.8284
C21.51151.35331.21162.37153.64762.13782.15042.15042.63402.63404.49423.93463.9346
O32.35941.35332.26181.44572.38913.28682.63282.63282.07612.07613.34672.65232.6523
O42.42581.21162.26182.66954.15532.57993.13013.13012.62152.62154.78594.58174.5817
C53.70312.37151.44572.66951.51734.50054.00384.00381.09501.09502.15172.16552.1655
C64.73083.64762.38914.15531.51735.67514.83524.83522.17972.17971.09551.09491.0949
H71.09052.13783.28682.57994.50055.67511.78911.78914.69234.69236.59265.81825.8182
H81.09512.15042.63283.13014.00384.83521.78911.76394.22314.57705.85035.00474.6815
H91.09512.15042.63283.13014.00384.83521.78911.76394.57704.22315.85034.68155.0047
H104.02922.63402.07612.62151.09502.17974.69234.22314.57701.76592.52093.08802.5301
H114.02922.63402.07612.62151.09502.17974.69234.57704.22311.76592.52092.53013.0880
H125.70594.49423.34674.78592.15171.09556.59265.85035.85032.52092.52091.77601.7760
H134.82843.93462.65234.58172.16551.09495.81825.00474.68153.08802.53011.77601.7751
H144.82843.93462.65234.58172.16551.09495.81824.68155.00472.53013.08801.77601.7751

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 110.773 C1 C2 O4 125.600
C2 C1 H7 109.433 C2 C1 H8 110.151
C2 C1 H9 110.151 C2 O3 C5 115.798
O3 C2 O4 123.627 O3 C5 C6 107.448
O3 C5 H10 108.821 O3 C5 H11 108.821
C5 C6 H12 109.826 C5 C6 H13 110.960
C5 C6 H14 110.960 C6 C5 H10 112.097
C6 C5 H11 112.097 H7 C1 H8 109.894
H7 C1 H9 109.894 H8 C1 H9 107.293
H10 C5 H11 107.482 H12 C6 H13 108.347
H12 C6 H14 108.347 H13 C6 H14 108.317
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.523      
2 C 0.602      
3 O -0.452      
4 O -0.469      
5 C -0.032      
6 C -0.460      
7 H 0.182      
8 H 0.180      
9 H 0.180      
10 H 0.159      
11 H 0.159      
12 H 0.152      
13 H 0.161      
14 H 0.161      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.307 1.936 0.000 1.960
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.317 -0.978 0.000
y -0.978 -42.103 0.000
z 0.000 0.000 -35.161
Traceless
 xyz
x 8.315 -0.978 0.000
y -0.978 -9.364 0.000
z 0.000 0.000 1.049
Polar
3z2-r22.097
x2-y211.786
xy-0.978
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.526 0.487 0.000
y 0.487 7.307 0.000
z 0.000 0.000 5.605


<r2> (average value of r2) Å2
<r2> 202.089
(<r2>)1/2 14.216