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: PBE1PBE/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 PBE1PBE/3-21G
 hartrees
Energy at 0K-305.663901
Energy at 298.15K 
HF Energy-305.663901
Nuclear repulsion energy241.760556
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 PBE1PBE/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' 3211 3084 4.03 63.22 0.68 0.81
2 A' 3163 3038 15.85 67.33 0.72 0.84
3 A' 3095 2972 1.93 56.02 0.00 0.00
4 A' 3093 2971 9.12 128.69 0.07 0.13
5 A' 3084 2962 10.67 95.48 0.02 0.03
6 A' 1800 1728 152.91 1.83 0.48 0.64
7 A' 1573 1511 9.28 0.98 0.72 0.84
8 A' 1561 1499 4.73 30.06 0.75 0.86
9 A' 1524 1464 19.60 19.22 0.74 0.85
10 A' 1461 1403 14.11 5.76 0.67 0.80
11 A' 1439 1382 49.80 5.22 0.68 0.81
12 A' 1416 1360 0.76 4.41 0.74 0.85
13 A' 1267 1217 406.11 0.66 0.37 0.54
14 A' 1155 1109 12.75 6.20 0.15 0.26
15 A' 1081 1038 107.82 2.71 0.65 0.79
16 A' 1032 991 2.71 2.00 0.45 0.62
17 A' 947 910 2.43 1.42 0.46 0.63
18 A' 849 815 7.69 13.67 0.28 0.43
19 A' 637 612 6.12 9.16 0.34 0.51
20 A' 410 393 0.59 0.29 0.59 0.74
21 A' 360 346 13.29 2.59 0.37 0.54
22 A' 186 179 5.37 0.30 0.68 0.81
23 A" 3174 3048 24.14 19.18 0.75 0.86
24 A" 3163 3037 1.74 54.81 0.75 0.86
25 A" 3135 3011 7.71 79.80 0.75 0.86
26 A" 1549 1488 8.94 23.88 0.75 0.86
27 A" 1537 1476 12.72 21.04 0.75 0.86
28 A" 1315 1263 0.07 12.76 0.75 0.86
29 A" 1192 1145 5.80 4.07 0.75 0.86
30 A" 1101 1058 12.62 0.38 0.75 0.86
31 A" 843 810 2.83 0.11 0.75 0.86
32 A" 605 581 3.81 1.42 0.75 0.86
33 A" 259 249 1.77 0.00 0.75 0.86
34 A" 155 149 5.77 0.01 0.75 0.86
35 A" 76 73 1.26 0.12 0.75 0.86
36 A" 35 34 0.32 0.31 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 26242.1 cm-1
Scaled (by 0.9604) Zero Point Vibrational Energy (zpe) 25202.9 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 PBE1PBE/3-21G
ABC
0.27171 0.06956 0.05716

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.314 0.065 0.000
C2 -0.930 -0.524 0.000
O3 0.000 0.488 0.000
O4 -0.618 -1.707 0.000
C5 1.406 0.041 0.000
C6 2.236 1.312 0.000
H7 -3.052 -0.738 0.000
H8 -2.442 0.699 0.884
H9 -2.442 0.699 -0.884
H10 1.586 -0.576 0.886
H11 1.586 -0.576 -0.886
H12 3.304 1.069 0.000
H13 2.006 1.909 -0.888
H14 2.006 1.909 0.888

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50482.35252.45333.72014.71801.09001.09481.09484.05104.05105.70694.78084.7808
C21.50481.37391.22352.40283.65962.13302.13592.13592.66782.66784.52303.91503.9150
O32.35251.37392.28011.47482.38323.28862.60512.60512.10542.10543.35432.61412.6141
O42.45331.22352.28012.67424.15462.62023.14573.14572.63092.63094.80454.55514.5551
C53.72012.40281.47482.67421.51814.52514.00184.00181.09471.09472.15822.15322.1532
C64.71803.65962.38324.15461.51815.67124.79964.79962.18472.18471.09521.09411.0941
H71.09002.13303.28862.62024.52515.67121.79331.79334.72494.72496.60725.77735.7773
H81.09482.13592.60513.14574.00184.79961.79331.76714.22494.58045.82454.93834.6096
H91.09482.13592.60513.14574.00184.79961.79331.76714.58044.22495.82454.60964.9383
H104.05102.66782.10542.63091.09472.18474.72494.22494.58041.77132.53753.08172.5200
H114.05102.66782.10542.63091.09472.18474.72494.58044.22491.77132.53752.52003.0817
H125.70694.52303.35434.80452.15821.09526.60725.82455.82452.53752.53751.78241.7824
H134.78083.91502.61414.55512.15321.09415.77734.93834.60963.08172.52001.78241.7763
H144.78083.91502.61414.55512.15321.09415.77734.60964.93832.52003.08171.78241.7763

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 109.530 C1 C2 O4 127.814
C2 C1 H7 109.541 C2 C1 H8 109.488
C2 C1 H9 109.488 C2 O3 C5 114.964
O3 C2 O4 122.657 O3 C5 C6 105.537
O3 C5 H10 109.150 O3 C5 H11 109.150
C5 C6 H12 110.298 C5 C6 H13 109.972
C5 C6 H14 109.972 C6 C5 H10 112.458
C6 C5 H11 112.458 H7 C1 H8 110.335
H7 C1 H9 110.335 H8 C1 H9 107.624
H10 C5 H11 108.003 H12 C6 H13 109.008
H12 C6 H14 109.008 H13 C6 H14 108.547
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.710      
2 C 0.656      
3 O -0.523      
4 O -0.497      
5 C -0.202      
6 C -0.658      
7 H 0.251      
8 H 0.259      
9 H 0.259      
10 H 0.239      
11 H 0.239      
12 H 0.220      
13 H 0.235      
14 H 0.235      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.277 1.731 0.000 1.753
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.880 -1.137 0.000
y -1.137 -42.242 0.000
z 0.000 0.000 -35.328
Traceless
 xyz
x 8.905 -1.137 0.000
y -1.137 -9.638 0.000
z 0.000 0.000 0.733
Polar
3z2-r21.466
x2-y212.362
xy-1.137
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.047 0.473 0.000
y 0.473 6.771 0.000
z 0.000 0.000 5.071


<r2> (average value of r2) Å2
<r2> 202.385
(<r2>)1/2 14.226