return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: B3LYPultrafine/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYPultrafine/6-31+G**
 hartrees
Energy at 0K-307.732357
Energy at 298.15K 
HF Energy-307.732357
Nuclear repulsion energy242.561687
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 B3LYPultrafine/6-31+G**
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' 3174 3056 6.49 64.51 0.68 0.81
2 A' 3120 3004 25.50 76.97 0.70 0.82
3 A' 3065 2951 18.28 73.40 0.10 0.18
4 A' 3062 2948 1.68 176.17 0.01 0.02
5 A' 3048 2935 19.14 143.75 0.01 0.01
6 A' 1797 1730 290.73 7.92 0.27 0.43
7 A' 1522 1465 6.06 1.51 0.70 0.82
8 A' 1503 1447 3.50 12.51 0.73 0.85
9 A' 1476 1421 15.21 8.54 0.68 0.81
10 A' 1432 1379 5.18 3.34 0.72 0.84
11 A' 1408 1356 51.18 0.75 0.75 0.86
12 A' 1392 1340 10.59 2.23 0.75 0.86
13 A' 1272 1225 430.57 0.83 0.49 0.66
14 A' 1136 1094 12.27 7.12 0.14 0.24
15 A' 1071 1031 115.85 2.82 0.73 0.84
16 A' 1013 975 4.29 1.51 0.22 0.36
17 A' 948 912 7.16 2.21 0.23 0.37
18 A' 858 826 10.36 8.07 0.28 0.43
19 A' 635 611 5.49 8.46 0.26 0.42
20 A' 430 414 0.98 0.43 0.67 0.80
21 A' 366 353 8.70 3.28 0.25 0.40
22 A' 191 184 6.09 0.31 0.57 0.72
23 A" 3132 3015 40.55 14.37 0.75 0.86
24 A" 3127 3011 4.77 58.33 0.75 0.86
25 A" 3105 2989 3.03 95.57 0.75 0.86
26 A" 1491 1436 7.78 9.70 0.75 0.86
27 A" 1482 1427 10.08 7.69 0.75 0.86
28 A" 1295 1247 0.97 8.26 0.75 0.86
29 A" 1178 1134 3.96 0.71 0.75 0.86
30 A" 1066 1026 6.00 0.06 0.75 0.86
31 A" 811 781 0.56 0.32 0.75 0.86
32 A" 606 584 5.42 0.97 0.75 0.86
33 A" 263 253 1.08 0.02 0.75 0.86
34 A" 153 148 5.29 0.02 0.75 0.86
35 A" 64 62 0.34 0.40 0.75 0.86
36 A" 35 34 0.48 0.12 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 25864.4 cm-1
Scaled (by 0.9627) Zero Point Vibrational Energy (zpe) 24899.7 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 B3LYPultrafine/6-31+G**
ABC
0.27948 0.06900 0.05711

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.319 0.018 0.000
C2 -0.912 -0.527 0.000
O3 0.000 0.473 0.000
O4 -0.612 -1.704 0.000
C5 1.395 0.077 0.000
C6 2.231 1.342 0.000
H7 -3.028 -0.809 0.000
H8 -2.478 0.646 0.882
H9 -2.478 0.646 -0.882
H10 1.582 -0.540 0.884
H11 1.582 -0.540 -0.884
H12 3.295 1.080 0.000
H13 2.027 1.949 -0.888
H14 2.027 1.949 0.888

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50932.36352.42463.71444.73941.08981.09431.09434.03884.03885.71344.83804.8380
C21.50931.35351.21452.38423.65702.13542.14642.14642.64572.64574.50283.94383.9438
O32.36351.35352.26181.45002.39463.28892.63602.63602.07642.07643.35002.65972.6597
O42.42461.21452.26182.68334.16732.57633.12753.12752.63632.63634.79734.59324.5932
C53.71442.38421.45002.68331.51694.51114.01254.01251.09441.09442.14842.16602.1660
C64.73943.65702.39464.16731.51695.68294.84164.84162.17892.17891.09511.09431.0943
H71.08982.13543.28892.57634.51115.68291.78861.78864.70204.70206.59925.82705.8270
H81.09432.14642.63603.12754.01254.84161.78861.76374.22984.58365.85575.01244.6897
H91.09432.14642.63603.12754.01254.84161.78861.76374.58364.22985.85574.68975.0124
H104.03882.64572.07642.63631.09442.17894.70204.22984.58361.76812.51803.08752.5286
H114.03882.64572.07642.63631.09442.17894.70204.58364.22981.76812.51802.52863.0875
H125.71344.50283.35004.79732.14841.09516.59925.85575.85572.51802.51801.77461.7746
H134.83803.94382.65974.59322.16601.09435.82705.01244.68973.08752.52861.77461.7752
H144.83803.94382.65974.59322.16601.09435.82704.68975.01242.52863.08751.77461.7752

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 111.182 C1 C2 O4 125.437
C2 C1 H7 109.434 C2 C1 H8 110.037
C2 C1 H9 110.037 C2 O3 C5 116.483
O3 C2 O4 123.381 O3 C5 C6 107.610
O3 C5 H10 108.586 O3 C5 H11 108.586
C5 C6 H12 109.614 C5 C6 H13 111.060
C5 C6 H14 111.060 C6 C5 H10 112.098
C6 C5 H11 112.098 H7 C1 H8 109.960
H7 C1 H9 109.960 H8 C1 H9 107.390
H10 C5 H11 107.764 H12 C6 H13 108.304
H12 C6 H14 108.304 H13 C6 H14 108.412
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.523      
2 C 0.513      
3 O -0.318      
4 O -0.470      
5 C 0.054      
6 C -0.577      
7 H 0.180      
8 H 0.178      
9 H 0.178      
10 H 0.156      
11 H 0.156      
12 H 0.150      
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
  0.358 2.123 0.000 2.153
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.576 -1.053 0.000
y -1.053 -43.907 0.000
z 0.000 0.000 -36.038
Traceless
 xyz
x 9.397 -1.053 0.000
y -1.053 -10.600 0.000
z 0.000 0.000 1.203
Polar
3z2-r22.407
x2-y213.331
xy-1.053
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.522 0.524 0.000
y 0.524 8.547 0.000
z 0.000 0.000 6.464


<r2> (average value of r2) Å2
<r2> 203.411
(<r2>)1/2 14.262