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: B2PLYP/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-307.588746
Energy at 298.15K 
HF Energy-307.215384
Nuclear repulsion energy243.843083
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/Def2TZVPP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3189 3189 6.07 58.63 0.67 0.80
2 A' 3139 3139 21.69 67.19 0.69 0.82
3 A' 3081 3081 17.11 51.75 0.11 0.19
4 A' 3079 3079 0.52 199.18 0.01 0.01
5 A' 3066 3066 15.52 156.40 0.01 0.01
6 A' 1785 1785 243.07 5.02 0.32 0.49
7 A' 1533 1533 5.80 1.22 0.75 0.86
8 A' 1512 1512 2.99 10.10 0.75 0.86
9 A' 1485 1485 14.77 7.37 0.67 0.80
10 A' 1438 1438 5.01 1.53 0.72 0.83
11 A' 1416 1416 39.58 0.17 0.75 0.86
12 A' 1402 1402 16.80 1.21 0.68 0.81
13 A' 1273 1273 410.69 0.68 0.50 0.67
14 A' 1145 1145 9.58 7.84 0.11 0.20
15 A' 1081 1081 119.28 2.30 0.75 0.86
16 A' 1020 1020 7.38 1.76 0.18 0.30
17 A' 953 953 8.15 1.99 0.15 0.26
18 A' 863 863 10.68 8.71 0.23 0.37
19 A' 641 641 6.00 7.89 0.26 0.41
20 A' 431 431 0.83 0.29 0.68 0.81
21 A' 370 370 8.57 3.04 0.27 0.42
22 A' 195 195 5.31 0.37 0.61 0.76
23 A" 3149 3149 35.06 14.05 0.75 0.86
24 A" 3146 3146 4.09 51.15 0.75 0.86
25 A" 3120 3120 3.38 82.77 0.75 0.86
26 A" 1500 1500 6.37 7.64 0.75 0.86
27 A" 1492 1492 7.93 6.51 0.75 0.86
28 A" 1307 1307 1.14 5.51 0.75 0.86
29 A" 1190 1190 3.49 0.57 0.75 0.86
30 A" 1074 1074 4.83 0.08 0.75 0.86
31 A" 818 818 0.55 0.13 0.75 0.86
32 A" 611 611 4.74 0.86 0.75 0.86
33 A" 265 265 0.99 0.03 0.75 0.86
34 A" 154 154 4.53 0.02 0.75 0.86
35 A" 67 67 0.31 0.24 0.75 0.86
36 A" 43 43 0.40 0.04 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 26014.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 26014.5 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 B2PLYP/Def2TZVPP
ABC
0.28215 0.06984 0.05778

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.308 0.029 0.000
C2 -0.909 -0.519 0.000
O3 0.000 0.479 0.000
O4 -0.612 -1.690 0.000
C5 1.384 0.067 0.000
C6 2.228 1.319 0.000
H7 -3.017 -0.791 0.000
H8 -2.460 0.654 0.878
H9 -2.460 0.654 -0.878
H10 1.564 -0.549 0.879
H11 1.564 -0.549 -0.879
H12 3.283 1.050 0.000
H13 2.028 1.922 -0.883
H14 2.028 1.922 0.883

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50322.35182.41443.69234.71631.08391.08821.08824.01314.01315.68424.81304.8130
C21.50321.34991.20732.36613.63562.12632.13412.13412.62482.62484.47603.91943.9194
O32.35181.34992.25361.44392.38113.27382.61792.61792.06822.06823.33272.64072.6407
O42.41441.20732.25362.65904.13752.56753.11103.11102.60992.60994.76254.56014.5601
C53.69232.36611.44392.65901.50994.48413.98643.98641.08851.08852.13882.15322.1532
C64.71633.63562.38114.13751.50995.65404.81594.81592.16842.16841.08901.08821.0882
H71.08392.12633.27382.56754.48415.65401.78011.78014.67174.67176.56435.79605.7960
H81.08822.13412.61793.11103.98644.81591.78011.75514.20074.55325.82384.98494.6636
H91.08822.13412.61793.11103.98644.81591.78011.75514.55324.20075.82384.66364.9849
H104.01312.62482.06822.60991.08852.16844.67174.20074.55321.75802.50683.07032.5143
H114.01312.62482.06822.60991.08852.16844.67174.55324.20071.75802.50682.51433.0703
H125.68424.47603.33274.76252.13881.08906.56435.82385.82382.50682.50681.76581.7658
H134.81303.91942.64074.56012.15321.08825.79604.98494.66363.07032.51431.76581.7662
H144.81303.91942.64074.56012.15321.08825.79604.66364.98492.51433.07031.76581.7662

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 110.922 C1 C2 O4 125.587
C2 C1 H7 109.478 C2 C1 H8 109.849
C2 C1 H9 109.849 C2 O3 C5 115.718
O3 C2 O4 123.491 O3 C5 C6 107.415
O3 C5 H10 108.700 O3 C5 H11 108.700
C5 C6 H12 109.704 C5 C6 H13 110.894
C5 C6 H14 110.894 C6 C5 H10 112.112
C6 C5 H11 112.112 H7 C1 H8 110.074
H7 C1 H9 110.074 H8 C1 H9 107.494
H10 C5 H11 107.713 H12 C6 H13 108.393
H12 C6 H14 108.393 H13 C6 H14 108.487
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.267      
2 C 0.324      
3 O -0.271      
4 O -0.337      
5 C 0.025      
6 C -0.233      
7 H 0.113      
8 H 0.104      
9 H 0.104      
10 H 0.093      
11 H 0.093      
12 H 0.080      
13 H 0.086      
14 H 0.086      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.302 1.981 0.000 2.004
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.993 -1.045 -0.006
y -1.045 -43.245 -0.013
z -0.006 -0.013 -35.921
Traceless
 xyz
x 8.590 -1.045 -0.006
y -1.045 -9.788 -0.013
z -0.006 -0.013 1.198
Polar
3z2-r22.397
x2-y212.252
xy-1.045
xz-0.006
yz-0.013


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.810 0.565 0.000
y 0.565 8.455 0.001
z 0.000 0.001 6.629


<r2> (average value of r2) Å2
<r2> 201.224
(<r2>)1/2 14.185