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

using model chemistry: B1B95/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/3-21G
 hartrees
Energy at 0K-305.871522
Energy at 298.15K 
HF Energy-305.871522
Nuclear repulsion energy242.205790
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 B1B95/3-21G
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' 3219 3080 4.50 63.65 0.68 0.81
2 A' 3171 3034 16.84 66.90 0.72 0.84
3 A' 3104 2970 1.87 58.25 0.00 0.00
4 A' 3103 2969 8.96 126.16 0.07 0.13
5 A' 3094 2960 11.07 95.79 0.02 0.03
6 A' 1799 1721 151.97 1.83 0.49 0.65
7 A' 1577 1508 8.67 0.87 0.72 0.84
8 A' 1564 1496 4.72 30.20 0.75 0.86
9 A' 1528 1462 19.12 19.26 0.74 0.85
10 A' 1464 1400 12.78 5.74 0.67 0.80
11 A' 1442 1379 46.13 5.31 0.69 0.82
12 A' 1416 1355 1.11 4.24 0.74 0.85
13 A' 1265 1211 404.04 0.64 0.40 0.57
14 A' 1153 1103 12.78 6.35 0.15 0.27
15 A' 1077 1030 114.02 2.70 0.65 0.79
16 A' 1031 986 2.33 2.17 0.45 0.62
17 A' 945 904 2.84 1.44 0.49 0.66
18 A' 848 811 8.11 14.16 0.28 0.44
19 A' 635 607 6.23 9.39 0.34 0.51
20 A' 404 387 0.56 0.28 0.57 0.73
21 A' 358 342 13.54 2.51 0.37 0.54
22 A' 185 177 5.21 0.30 0.70 0.82
23 A" 3183 3045 25.41 19.03 0.75 0.86
24 A" 3171 3034 2.05 54.81 0.75 0.86
25 A" 3145 3009 7.74 79.70 0.75 0.86
26 A" 1552 1485 8.54 23.88 0.75 0.86
27 A" 1540 1474 12.29 21.21 0.75 0.86
28 A" 1314 1257 0.03 12.83 0.75 0.86
29 A" 1192 1141 5.86 4.23 0.75 0.86
30 A" 1102 1054 11.90 0.42 0.75 0.86
31 A" 844 807 2.65 0.10 0.75 0.86
32 A" 603 577 3.98 1.42 0.75 0.86
33 A" 258 247 1.79 0.00 0.75 0.86
34 A" 156 149 5.81 0.01 0.75 0.86
35 A" 75 72 1.20 0.12 0.75 0.86
36 A" 40 38 0.29 0.30 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 26278.3 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 25140.5 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 B1B95/3-21G
ABC
0.27286 0.06984 0.05739

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.313 0.070 0.000
C2 -0.931 -0.518 0.000
O3 0.000 0.491 0.000
O4 -0.616 -1.698 0.000
C5 1.402 0.034 0.000
C6 2.238 1.300 0.000
H7 -3.050 -0.730 0.000
H8 -2.439 0.702 0.881
H9 -2.439 0.702 -0.881
H10 1.576 -0.583 0.883
H11 1.576 -0.583 -0.883
H12 3.302 1.053 0.000
H13 2.011 1.895 -0.886
H14 2.011 1.895 0.886

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50282.35132.45143.71604.71431.08701.09171.09174.04154.04155.70024.77644.7764
C21.50281.37261.22132.39753.65292.12952.13132.13132.65842.65844.51433.90653.9065
O32.35131.37262.27401.47482.37963.28472.60232.60232.10162.10163.34902.60772.6077
O42.45141.22132.27402.65994.13902.61953.14073.14072.61302.61304.78684.53824.5382
C53.71602.39751.47482.65991.51644.51703.99783.99781.09151.09152.15502.14872.1487
C64.71433.65292.37964.13901.51645.66344.79694.79692.18252.18251.09211.09091.0909
H71.08702.12953.28472.61954.51705.66341.78831.78834.71144.71146.59655.76905.7690
H81.09172.13132.60233.14073.99784.79691.78831.76264.21594.57045.81884.93474.6075
H91.09172.13132.60233.14073.99784.79691.78831.76264.57044.21595.81884.60754.9347
H104.04152.65842.10162.61301.09152.18254.71144.21594.57041.76672.53643.07552.5158
H114.04152.65842.10162.61301.09152.18254.71144.57044.21591.76672.53642.51583.0755
H125.70024.51433.34904.78682.15501.09216.59655.81885.81882.53642.53641.77751.7775
H134.77643.90652.60774.53822.14871.09095.76904.93474.60753.07552.51581.77751.7714
H144.77643.90652.60774.53822.14871.09095.76904.60754.93472.51583.07551.77751.7714

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 109.630 C1 C2 O4 127.991
C2 C1 H7 109.578 C2 C1 H8 109.443
C2 C1 H9 109.443 C2 O3 C5 114.655
O3 C2 O4 122.379 O3 C5 C6 105.402
O3 C5 H10 109.037 O3 C5 H11 109.037
C5 C6 H12 110.350 C5 C6 H13 109.920
C5 C6 H14 109.920 C6 C5 H10 112.605
C6 C5 H11 112.605 H7 C1 H8 110.338
H7 C1 H9 110.338 H8 C1 H9 107.670
H10 C5 H11 108.051 H12 C6 H13 109.027
H12 C6 H14 109.027 H13 C6 H14 108.560
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.683      
2 C 0.646      
3 O -0.524      
4 O -0.493      
5 C -0.192      
6 C -0.634      
7 H 0.244      
8 H 0.252      
9 H 0.252      
10 H 0.233      
11 H 0.233      
12 H 0.212      
13 H 0.227      
14 H 0.227      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.262 1.700 0.000 1.721
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.756 -1.132 0.000
y -1.132 -42.097 0.000
z 0.000 0.000 -35.215
Traceless
 xyz
x 8.900 -1.132 0.000
y -1.132 -9.611 0.000
z 0.000 0.000 0.712
Polar
3z2-r21.423
x2-y212.341
xy-1.132
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.037 0.467 0.000
y 0.467 6.741 0.000
z 0.000 0.000 5.053


<r2> (average value of r2) Å2
<r2> 201.589
(<r2>)1/2 14.198