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=FULL/cc-pVTZ

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=FULL/cc-pVTZ
 hartrees
Energy at 0K-307.603734
Energy at 298.15K 
HF Energy-307.203364
Nuclear repulsion energy244.110321
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=FULL/cc-pVTZ
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' 3188 3047 6.22 60.30 0.67 0.80
2 A' 3138 2999 22.70 69.20 0.69 0.82
3 A' 3083 2947 16.96 51.99 0.12 0.21
4 A' 3081 2945 0.56 189.40 0.01 0.02
5 A' 3068 2933 15.61 150.90 0.01 0.01
6 A' 1796 1716 231.90 4.23 0.36 0.53
7 A' 1539 1471 5.43 1.46 0.75 0.86
8 A' 1516 1449 3.05 10.90 0.75 0.86
9 A' 1489 1423 14.57 7.97 0.68 0.81
10 A' 1441 1378 5.56 1.59 0.71 0.83
11 A' 1418 1355 40.06 0.25 0.75 0.86
12 A' 1403 1341 21.39 1.15 0.66 0.80
13 A' 1278 1221 406.84 0.73 0.49 0.66
14 A' 1148 1097 10.00 7.08 0.12 0.21
15 A' 1084 1036 116.88 2.29 0.75 0.86
16 A' 1022 977 7.49 1.79 0.19 0.32
17 A' 956 913 7.56 1.85 0.14 0.25
18 A' 866 827 10.42 8.40 0.24 0.38
19 A' 643 615 6.05 7.75 0.28 0.43
20 A' 431 412 0.79 0.28 0.67 0.80
21 A' 371 355 8.82 2.99 0.28 0.44
22 A' 195 187 5.07 0.38 0.61 0.76
23 A" 3147 3008 36.12 14.63 0.75 0.86
24 A" 3144 3005 4.35 52.91 0.75 0.86
25 A" 3117 2980 3.67 86.27 0.75 0.86
26 A" 1504 1438 6.42 7.91 0.75 0.86
27 A" 1496 1430 7.64 6.96 0.75 0.86
28 A" 1310 1252 1.14 4.95 0.75 0.86
29 A" 1194 1141 3.56 0.60 0.75 0.86
30 A" 1077 1029 5.17 0.05 0.75 0.86
31 A" 821 785 0.60 0.13 0.75 0.86
32 A" 614 587 4.68 0.72 0.75 0.86
33 A" 270 259 1.02 0.02 0.75 0.86
34 A" 155 148 4.36 0.02 0.75 0.86
35 A" 71 68 0.21 0.20 0.75 0.86
36 A" 51 48 0.55 0.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 26060.5 cm-1
Scaled (by 0.9558) Zero Point Vibrational Energy (zpe) 24908.6 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=FULL/cc-pVTZ
ABC
0.28263 0.07004 0.05793

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.305 0.031 0.000
C2 -0.908 -0.517 0.000
O3 0.000 0.480 0.000
O4 -0.612 -1.687 0.000
C5 1.381 0.065 0.000
C6 2.227 1.314 0.000
H7 -3.014 -0.788 0.000
H8 -2.457 0.656 0.877
H9 -2.457 0.656 -0.877
H10 1.562 -0.551 0.878
H11 1.562 -0.551 -0.878
H12 3.281 1.045 0.000
H13 2.026 1.917 -0.882
H14 2.026 1.917 0.882

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50132.34882.41203.68704.71031.08291.08721.08724.00784.00785.67774.80604.8060
C21.50131.34881.20662.36213.63042.12372.13162.13162.62112.62114.47073.91303.9130
O32.34881.34882.25241.44252.37783.27012.61422.61422.06702.06703.32922.63582.6358
O42.41201.20662.25242.65454.13162.56473.10793.10792.60572.60574.75664.55324.5532
C53.68702.36211.44252.65451.50834.47763.98103.98101.08731.08732.13752.15032.1503
C64.71033.63042.37784.13161.50835.64684.81004.81002.16572.16571.08801.08721.0872
H71.08292.12373.27012.56474.47765.64681.77861.77864.66544.66546.55665.78785.7878
H81.08722.13162.61423.10793.98104.81001.77861.75344.19544.54765.81724.97784.6567
H91.08722.13162.61423.10793.98104.81001.77861.75344.54764.19545.81724.65674.9778
H104.00782.62112.06702.60571.08732.16574.66544.19544.54761.75612.50463.06642.5110
H114.00782.62112.06702.60571.08732.16574.66544.54764.19541.75612.50462.51103.0664
H125.67774.47073.32924.75662.13751.08806.55665.81725.81722.50462.50461.76441.7644
H134.80603.91302.63584.55322.15031.08725.78784.97784.65673.06642.51101.76441.7642
H144.80603.91302.63584.55322.15031.08725.78784.65674.97782.51103.06641.76441.7642

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 110.884 C1 C2 O4 125.582
C2 C1 H7 109.472 C2 C1 H8 109.837
C2 C1 H9 109.837 C2 O3 C5 115.568
O3 C2 O4 123.534 O3 C5 C6 107.354
O3 C5 H10 108.764 O3 C5 H11 108.764
C5 C6 H12 109.772 C5 C6 H13 110.846
C5 C6 H14 110.846 C6 C5 H10 112.084
C6 C5 H11 112.084 H7 C1 H8 110.093
H7 C1 H9 110.093 H8 C1 H9 107.484
H10 C5 H11 107.707 H12 C6 H13 108.422
H12 C6 H14 108.422 H13 C6 H14 108.461
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability