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

using model chemistry: HF/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 HF/3-21G
 hartrees
Energy at 0K-304.171618
Energy at 298.15K 
HF Energy-304.171618
Nuclear repulsion energy243.237419
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/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' 3331 3016 6.79 67.05 0.66 0.80
2 A' 3278 2969 30.66 56.48 0.69 0.82
3 A' 3250 2943 8.56 99.72 0.18 0.31
4 A' 3228 2923 1.12 99.23 0.01 0.03
5 A' 3215 2911 16.16 95.07 0.03 0.06
6 A' 1943 1759 231.48 4.00 0.72 0.84
7 A' 1695 1535 5.28 4.38 0.73 0.85
8 A' 1672 1514 4.90 27.83 0.75 0.85
9 A' 1632 1478 19.62 20.32 0.75 0.86
10 A' 1578 1429 9.32 2.97 0.74 0.85
11 A' 1567 1419 41.34 2.81 0.75 0.86
12 A' 1548 1401 0.32 3.85 0.56 0.72
13 A' 1381 1250 570.15 0.66 0.75 0.86
14 A' 1243 1125 27.86 8.14 0.16 0.27
15 A' 1175 1064 96.87 1.67 0.73 0.84
16 A' 1091 988 5.93 5.80 0.46 0.63
17 A' 987 894 1.00 2.45 0.74 0.85
18 A' 914 828 13.50 15.62 0.29 0.45
19 A' 675 611 13.33 10.16 0.31 0.48
20 A' 436 395 0.65 0.26 0.58 0.73
21 A' 379 343 14.72 2.59 0.34 0.51
22 A' 192 174 6.93 0.30 0.69 0.82
23 A" 3305 2993 46.40 2.39 0.75 0.86
24 A" 3284 2974 3.55 58.59 0.75 0.86
25 A" 3277 2968 0.14 104.82 0.75 0.86
26 A" 1658 1502 6.02 23.82 0.75 0.86
27 A" 1646 1490 9.53 22.42 0.75 0.86
28 A" 1425 1291 0.04 14.11 0.75 0.86
29 A" 1294 1172 8.40 2.69 0.75 0.86
30 A" 1202 1089 17.01 0.87 0.75 0.86
31 A" 905 820 0.55 0.12 0.75 0.86
32 A" 653 592 14.22 1.80 0.75 0.86
33 A" 267 242 2.14 0.00 0.75 0.86
34 A" 155 140 7.94 0.00 0.75 0.86
35 A" 117 106 0.93 0.08 0.75 0.86
36 A" 58 52 0.46 0.24 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 27826.3 cm-1
Scaled (by 0.9056) Zero Point Vibrational Energy (zpe) 25199.5 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/3-21G
ABC
0.27701 0.06953 0.05734

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.303 -0.014 0.000
C2 -0.906 -0.564 0.000
O3 0.000 0.440 0.000
O4 -0.585 -1.724 0.000
C5 1.418 0.097 0.000
C6 2.167 1.422 0.000
H7 -3.014 -0.825 0.000
H8 -2.443 0.608 0.874
H9 -2.443 0.608 -0.874
H10 1.638 -0.495 0.876
H11 1.638 -0.495 -0.876
H12 3.237 1.249 0.000
H13 1.903 1.995 -0.878
H14 1.903 1.995 0.878

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50142.34752.42433.72334.69561.07811.08261.08264.06634.06635.68264.74334.7433
C21.50141.35241.20372.41693.65942.12402.12152.12152.69202.69204.52283.90033.9003
O32.34751.35242.24161.45922.37953.26862.59982.59982.07962.07963.33682.60992.6099
O42.42431.20372.24162.70744.18002.59053.10783.10782.68722.68724.84244.56014.5601
C53.72332.41691.45922.70741.52184.52743.99163.99161.07981.07982.15292.14692.1469
C64.69563.65942.37954.18001.52185.64764.76204.76202.17272.17271.08361.08191.0819
H71.07812.12403.26862.59054.52745.64761.77381.77384.74584.74586.58635.73585.7358
H81.08262.12152.59983.10783.99164.76201.77381.74894.22754.57555.78214.88624.5610
H91.08262.12152.59983.10783.99164.76201.77381.74894.57554.22755.78214.56104.8862
H104.06632.69202.07962.68721.07982.17274.74584.22754.57551.75162.52293.05752.5042
H114.06632.69202.07962.68721.07982.17274.74584.57554.22751.75162.52292.50423.0575
H125.68264.52283.33684.84242.15291.08366.58635.78215.78212.52292.52291.76331.7633
H134.74333.90032.60994.56012.14691.08195.73584.88624.56103.05752.50421.76331.7567
H144.74333.90032.60994.56012.14691.08195.73584.56104.88622.50423.05751.76331.7567

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 110.580 C1 C2 O4 126.977
C2 C1 H7 109.763 C2 C1 H8 109.298
C2 C1 H9 109.298 C2 O3 C5 118.492
O3 C2 O4 122.443 O3 C5 C6 105.905
O3 C5 H10 109.075 O3 C5 H11 109.075
C5 C6 H12 110.320 C5 C6 H13 109.940
C5 C6 H14 109.940 C6 C5 H10 112.148
C6 C5 H11 112.148 H7 C1 H8 110.350
H7 C1 H9 110.350 H8 C1 H9 107.743
H10 C5 H11 108.403 H12 C6 H13 109.027
H12 C6 H14 109.027 H13 C6 H14 108.553
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.676      
2 C 0.860      
3 O -0.707      
4 O -0.613      
5 C -0.095      
6 C -0.614      
7 H 0.245      
8 H 0.251      
9 H 0.251      
10 H 0.226      
11 H 0.226      
12 H 0.203      
13 H 0.223      
14 H 0.223      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.197 1.967 0.000 1.977
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.822 -0.945 0.000
y -0.945 -44.082 0.000
z 0.000 0.000 -35.641
Traceless
 xyz
x 10.040 -0.945 0.000
y -0.945 -11.351 0.000
z 0.000 0.000 1.310
Polar
3z2-r22.621
x2-y214.261
xy-0.945
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.160 0.368 0.000
y 0.368 6.527 0.000
z 0.000 0.000 4.930


<r2> (average value of r2) Å2
<r2> 202.129
(<r2>)1/2 14.217