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

using model chemistry: B2PLYP/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 B2PLYP/6-31G*
 hartrees
Energy at 0K-307.375536
Energy at 298.15K 
HF Energy-307.086633
Nuclear repulsion energy243.135029
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 B2PLYP/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' 3218 3054 7.13 63.48 0.69 0.81
2 A' 3170 3009 23.47 69.73 0.73 0.84
3 A' 3108 2950 16.74 66.96 0.12 0.22
4 A' 3104 2946 1.42 123.36 0.01 0.02
5 A' 3094 2936 15.24 101.50 0.01 0.02
6 A' 1824 1732 209.57 3.54 0.38 0.55
7 A' 1567 1488 4.48 0.94 0.73 0.84
8 A' 1548 1469 2.51 23.41 0.75 0.86
9 A' 1522 1445 12.95 14.97 0.73 0.85
10 A' 1471 1396 5.10 5.87 0.74 0.85
11 A' 1446 1373 49.19 2.54 0.74 0.85
12 A' 1425 1353 8.11 3.17 0.63 0.77
13 A' 1302 1236 413.88 0.36 0.23 0.37
14 A' 1163 1104 14.31 6.81 0.17 0.30
15 A' 1097 1042 103.42 3.11 0.71 0.83
16 A' 1035 983 5.81 1.57 0.27 0.42
17 A' 962 913 6.89 1.92 0.24 0.39
18 A' 874 830 10.08 10.49 0.31 0.47
19 A' 643 610 6.92 8.02 0.33 0.49
20 A' 431 409 0.75 0.41 0.70 0.82
21 A' 372 353 9.71 2.81 0.32 0.48
22 A' 196 186 5.03 0.27 0.64 0.78
23 A" 3181 3020 37.29 19.35 0.75 0.86
24 A" 3175 3013 5.54 56.38 0.75 0.86
25 A" 3152 2991 7.67 82.86 0.75 0.86
26 A" 1537 1459 5.39 19.47 0.75 0.86
27 A" 1526 1448 7.99 16.69 0.75 0.86
28 A" 1320 1253 0.45 11.78 0.75 0.86
29 A" 1210 1148 4.53 1.90 0.75 0.86
30 A" 1089 1034 6.62 0.86 0.75 0.86
31 A" 829 787 0.48 0.19 0.75 0.86
32 A" 606 575 5.93 1.43 0.75 0.86
33 A" 273 259 1.03 0.01 0.75 0.86
34 A" 156 148 4.35 0.01 0.75 0.86
35 A" 68 65 0.00 0.37 0.75 0.86
36 A" 56 53 0.87 0.03 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 26374.7 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 25034.8 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 B2PLYP/6-31G*
ABC
0.27918 0.06968 0.05756

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.313 0.031 0.000
C2 -0.909 -0.520 0.000
O3 0.000 0.484 0.000
O4 -0.609 -1.697 0.000
C5 1.384 0.065 0.000
C6 2.230 1.321 0.000
H7 -3.024 -0.794 0.000
H8 -2.468 0.658 0.881
H9 -2.468 0.658 -0.881
H10 1.566 -0.554 0.882
H11 1.566 -0.554 -0.882
H12 3.291 1.055 0.000
H13 2.026 1.926 -0.886
H14 2.026 1.926 0.886

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50822.35662.42643.69724.72261.08861.09261.09264.02014.02015.69634.81664.8166
C21.50821.35421.21462.36663.63912.13272.14382.14382.62702.62704.48523.92193.9219
O32.35661.35422.26491.44632.38223.28252.62642.62642.07522.07523.34002.63992.6399
O42.42641.21462.26492.66134.14432.57793.12693.12692.61092.61094.77374.56734.5673
C53.69722.36661.44632.66131.51424.49093.99613.99611.09271.09272.14812.15872.1587
C64.72263.63912.38224.14431.51425.66354.82604.82602.17602.17601.09341.09231.0923
H71.08862.13273.28252.57794.49095.66351.78651.78654.67954.67956.57955.80345.8034
H81.09262.14382.62643.12693.99614.82601.78651.76224.21194.56605.83954.99274.6694
H91.09262.14382.62643.12693.99614.82601.78651.76224.56604.21195.83954.66944.9927
H104.02012.62702.07522.61091.09272.17604.67954.21194.56601.76362.51843.08032.5225
H114.02012.62702.07522.61091.09272.17604.67954.56604.21191.76362.51842.52253.0803
H125.69634.48523.34004.77372.14811.09346.57955.83955.83952.51842.51841.77331.7733
H134.81663.92192.63994.56732.15871.09235.80344.99274.66943.08032.52251.77331.7723
H144.81663.92192.63994.56732.15871.09235.80344.66944.99272.52253.08031.77331.7723

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 110.714 C1 C2 O4 125.685
C2 C1 H7 109.356 C2 C1 H8 110.004
C2 C1 H9 110.004 C2 O3 C5 115.312
O3 C2 O4 123.601 O3 C5 C6 107.135
O3 C5 H10 108.841 O3 C5 H11 108.841
C5 C6 H12 109.878 C5 C6 H13 110.786
C5 C6 H14 110.786 C6 C5 H10 112.165
C6 C5 H11 112.165 H7 C1 H8 109.977
H7 C1 H9 109.977 H8 C1 H9 107.503
H10 C5 H11 107.616 H12 C6 H13 108.444
H12 C6 H14 108.444 H13 C6 H14 108.430
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.539      
2 C 0.601      
3 O -0.472      
4 O -0.464      
5 C -0.039      
6 C -0.476      
7 H 0.189      
8 H 0.187      
9 H 0.187      
10 H 0.166      
11 H 0.166      
12 H 0.159      
13 H 0.167      
14 H 0.167      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.314 1.890 0.000 1.915
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.518 -0.999 -0.006
y -0.999 -42.327 -0.013
z -0.006 -0.013 -35.359
Traceless
 xyz
x 8.325 -0.999 -0.006
y -0.999 -9.388 -0.013
z -0.006 -0.013 1.064
Polar
3z2-r22.127
x2-y211.809
xy-0.999
xz-0.006
yz-0.013


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.363 0.475 0.000
y 0.475 7.260 0.001
z 0.000 0.001 5.557


<r2> (average value of r2) Å2
<r2> 201.522
(<r2>)1/2 14.196