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: HSEh1PBE/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 HSEh1PBE/3-21G
 hartrees
Energy at 0K-305.690484
Energy at 298.15K 
HF Energy-305.690484
Nuclear repulsion energy241.777922
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 HSEh1PBE/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 3094 4.18 63.29 0.67 0.81
2 A' 3163 3047 16.14 67.37 0.72 0.84
3 A' 3096 2982 1.50 66.63 0.00 0.00
4 A' 3094 2980 9.79 116.72 0.08 0.14
5 A' 3085 2972 10.85 96.23 0.02 0.03
6 A' 1799 1733 152.48 1.82 0.47 0.64
7 A' 1575 1517 9.20 0.94 0.72 0.83
8 A' 1562 1505 4.83 30.08 0.75 0.86
9 A' 1525 1469 19.65 19.22 0.74 0.85
10 A' 1462 1409 13.99 5.78 0.67 0.80
11 A' 1440 1387 48.95 5.33 0.68 0.81
12 A' 1417 1365 0.76 4.44 0.74 0.85
13 A' 1266 1219 402.77 0.67 0.37 0.55
14 A' 1155 1113 12.30 6.13 0.15 0.27
15 A' 1079 1039 112.90 2.70 0.64 0.78
16 A' 1033 995 2.58 2.01 0.45 0.62
17 A' 947 912 2.90 1.40 0.46 0.63
18 A' 848 817 7.70 13.75 0.28 0.44
19 A' 637 614 5.95 9.24 0.34 0.51
20 A' 410 395 0.56 0.30 0.58 0.73
21 A' 360 347 13.24 2.62 0.37 0.54
22 A' 187 180 5.35 0.30 0.68 0.81
23 A" 3174 3058 24.55 19.24 0.75 0.86
24 A" 3163 3047 1.86 54.82 0.75 0.86
25 A" 3135 3020 7.83 79.59 0.75 0.86
26 A" 1550 1493 8.92 23.83 0.75 0.86
27 A" 1538 1482 12.72 21.00 0.75 0.86
28 A" 1316 1267 0.07 12.69 0.75 0.86
29 A" 1193 1149 5.76 4.17 0.75 0.86
30 A" 1103 1062 12.58 0.38 0.75 0.86
31 A" 845 814 2.83 0.10 0.75 0.86
32 A" 605 583 3.81 1.42 0.75 0.86
33 A" 260 250 1.75 0.00 0.75 0.86
34 A" 155 150 5.72 0.00 0.75 0.86
35 A" 76 73 1.28 0.12 0.75 0.86
36 A" 34 33 0.33 0.31 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 26248.5 cm-1
Scaled (by 0.9633) Zero Point Vibrational Energy (zpe) 25285.2 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 HSEh1PBE/3-21G
ABC
0.27195 0.06954 0.05716

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/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 -0.619 -1.707 0.000
C5 1.406 0.041 0.000
C6 2.237 1.311 0.000
H7 -3.052 -0.737 0.000
H8 -2.442 0.699 0.883
H9 -2.442 0.699 -0.883
H10 1.587 -0.576 0.885
H11 1.587 -0.576 -0.885
H12 3.304 1.067 0.000
H13 2.008 1.907 -0.888
H14 2.008 1.907 0.888

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50412.35232.45213.72054.71841.08971.09451.09454.05114.05115.70684.78164.7816
C21.50411.37401.22312.40373.66002.13232.13542.13542.66842.66844.52313.91563.9156
O32.35231.37402.27991.47552.38363.28822.60522.60522.10552.10553.35452.61482.6148
O42.45211.22312.27992.67524.15482.61903.14483.14482.63172.63174.80454.55544.5554
C53.72052.40371.47552.67521.51734.52544.00264.00261.09431.09432.15732.15252.1525
C64.71843.66002.38364.15481.51735.67124.80044.80042.18372.18371.09481.09371.0937
H71.08972.13233.28822.61904.52545.67121.79261.79264.72484.72486.60685.77785.7778
H81.09452.13542.60523.14484.00264.80041.79261.76634.22554.58065.82504.93954.6111
H91.09452.13542.60523.14484.00264.80041.79261.76634.58064.22555.82504.61114.9395
H104.05112.66842.10552.63171.09432.18374.72484.22554.58061.77042.53653.08072.5194
H114.05112.66842.10552.63171.09432.18374.72484.58064.22551.77042.53652.51943.0807
H125.70684.52313.35454.80452.15731.09486.60685.82505.82502.53652.53651.78161.7816
H134.78163.91562.61484.55542.15251.09375.77784.93954.61113.08072.51941.78161.7756
H144.78163.91562.61484.55542.15251.09375.77784.61114.93952.51943.08071.78161.7756

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 109.551 C1 C2 O4 127.787
C2 C1 H7 109.554 C2 C1 H8 109.516
C2 C1 H9 109.516 C2 O3 C5 114.993
O3 C2 O4 122.662 O3 C5 C6 105.576
O3 C5 H10 109.137 O3 C5 H11 109.137
C5 C6 H12 110.305 C5 C6 H13 109.996
C5 C6 H14 109.996 C6 C5 H10 112.464
C6 C5 H11 112.464 H7 C1 H8 110.316
H7 C1 H9 110.316 H8 C1 H9 107.594
H10 C5 H11 107.979 H12 C6 H13 108.989
H12 C6 H14 108.989 H13 C6 H14 108.529
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.705      
2 C 0.654      
3 O -0.521      
4 O -0.496      
5 C -0.198      
6 C -0.653      
7 H 0.249      
8 H 0.257      
9 H 0.257      
10 H 0.237      
11 H 0.237      
12 H 0.218      
13 H 0.233      
14 H 0.233      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.283 1.730 0.000 1.753
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.883 -1.139 0.000
y -1.139 -42.217 0.000
z 0.000 0.000 -35.309
Traceless
 xyz
x 8.880 -1.139 0.000
y -1.139 -9.621 0.000
z 0.000 0.000 0.742
Polar
3z2-r21.483
x2-y212.334
xy-1.139
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.053 0.475 0.000
y 0.475 6.761 0.000
z 0.000 0.000 5.063


<r2> (average value of r2) Å2
<r2> 202.391
(<r2>)1/2 14.226