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All results from a given calculation for CH3COOCH3 (methyl acetate)

using model chemistry: MP2/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/CEP-31G
 hartrees
Energy at 0K-51.685440
Energy at 298.15K-51.692034
HF Energy-51.221482
Nuclear repulsion energy97.644435
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 MP2/CEP-31G
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' 3224 3115 30.43      
2 A' 3197 3089 20.89      
3 A' 3067 2963 50.72      
4 A' 3066 2962 4.59      
5 A' 1637 1582 141.03      
6 A' 1524 1472 8.02      
7 A' 1508 1457 25.00      
8 A' 1476 1427 9.74      
9 A' 1450 1402 23.20      
10 A' 1251 1209 307.29      
11 A' 1190 1150 8.08      
12 A' 1057 1021 99.19      
13 A' 961 929 24.65      
14 A' 782 756 35.28      
15 A' 610 589 9.18      
16 A' 400 387 4.16      
17 A' 262 253 13.99      
18 A" 3187 3079 47.11      
19 A" 3170 3063 19.18      
20 A" 1509 1458 8.52      
21 A" 1502 1452 11.70      
22 A" 1155 1116 1.15      
23 A" 1098 1061 6.25      
24 A" 561 542 6.73      
25 A" 177 171 14.53      
26 A" 134 129 0.78      
27 A" 61 59 0.67      

Unscaled Zero Point Vibrational Energy (zpe) 19607.0 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 18946.2 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 MP2/CEP-31G
ABC
0.31294 0.12890 0.09465

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.146 1.559 0.000
C2 0.000 0.530 0.000
O3 -1.247 0.777 0.000
O4 0.513 -0.793 0.000
C5 -0.513 -1.893 0.000
H6 0.716 2.577 0.000
H7 1.779 1.411 0.897
H8 1.779 1.411 -0.897
H9 0.092 -2.813 0.000
H10 -1.144 -1.817 0.905
H11 -1.144 -1.817 -0.905

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 H6 H7 H8 H9 H10 H11
C11.54062.51802.43633.83071.10551.10801.10804.49794.17894.1789
C21.54061.27141.41892.47702.16902.17862.17863.34472.76332.7633
O32.51801.27142.35842.76932.66363.21953.21953.83222.74942.7494
O42.43631.41892.35841.50423.37672.69562.69562.06352.14742.1474
C53.83072.47702.76931.50424.63664.12034.12031.10161.10581.1058
H61.10552.16902.66363.37674.63661.81581.81585.42684.85684.8568
H71.10802.17863.21952.69564.12031.81581.79464.63624.35454.7128
H81.10802.17863.21952.69564.12031.81581.79464.63624.71284.3545
H94.49793.34473.83222.06351.10165.42684.63624.63621.82771.8277
H104.17892.76332.74942.14741.10584.85684.35454.71281.82771.8105
H114.17892.76332.74942.14741.10584.85684.71284.35451.82771.8105

picture of methyl acetate state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 126.871 C1 C2 O4 110.744
C2 C1 H6 109.003 C2 C1 H7 109.597
C2 C1 H8 109.597 C2 O4 C5 115.823
O3 C2 O4 122.384 O4 C5 H9 103.651
O4 C5 H10 109.780 O4 C5 H11 109.780
H6 C1 H7 110.237 H6 C1 H8 110.237
H7 C1 H8 108.157 H9 C5 H10 111.783
H9 C5 H11 111.783 H10 C5 H11 109.891
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability