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

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-265.860497
Energy at 298.15K-265.867179
HF Energy-265.341765
Nuclear repulsion energy177.404099
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 MP2/3-21G*
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' 3220 3063 14.53      
2 A' 3214 3058 5.86      
3 A' 3114 2962 1.63      
4 A' 3105 2953 18.43      
5 A' 1727 1643 91.17      
6 A' 1603 1525 6.86      
7 A' 1573 1496 20.14      
8 A' 1523 1448 4.12      
9 A' 1474 1402 23.66      
10 A' 1257 1196 306.01      
11 A' 1204 1145 11.37      
12 A' 1077 1025 99.37      
13 A' 974 926 2.60      
14 A' 806 766 20.15      
15 A' 633 602 5.64      
16 A' 408 388 5.67      
17 A' 270 256 12.55      
18 A" 3186 3030 4.12      
19 A" 3176 3021 24.01      
20 A" 1588 1511 6.18      
21 A" 1582 1505 7.77      
22 A" 1190 1132 0.35      
23 A" 1125 1071 7.86      
24 A" 596 567 5.53      
25 A" 174 165 10.05      
26 A" 102 97 0.87      
27 A" 91 86 0.13      

Unscaled Zero Point Vibrational Energy (zpe) 19993.9 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 19020.2 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 MP2/3-21G*
ABC
0.32281 0.13477 0.09861

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.155 1.508 0.000
C2 0.000 0.521 0.000
O3 -1.213 0.768 0.000
O4 0.507 -0.780 0.000
C5 -0.543 -1.836 0.000
H6 0.753 2.522 0.000
H7 1.774 1.346 0.886
H8 1.774 1.346 -0.886
H9 0.016 -2.770 0.000
H10 -1.173 -1.753 0.888
H11 -1.173 -1.753 -0.888

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 H6 H7 H8 H9 H10 H11
C11.51962.48062.37863.75031.09051.09331.09334.42774.10454.1045
C21.51961.23771.39642.41822.13822.14772.14773.29112.70862.7086
O32.48061.23772.31422.68882.63423.16853.16853.74562.67382.6738
O42.37861.39642.31421.48863.31142.62862.62862.04982.13512.1351
C53.75032.41822.68881.48864.54624.03394.03391.08851.09241.0924
H61.09052.13822.63423.31144.54621.79231.79235.34344.77254.7725
H71.09332.14773.16852.62864.03391.79231.77244.56264.27644.6300
H81.09332.14773.16852.62864.03391.79231.77244.56264.63004.2764
H94.42773.29113.74562.04981.08855.34344.56264.56261.79891.7989
H104.10452.70862.67382.13511.09244.77254.27644.63001.79891.7768
H114.10452.70862.67382.13511.09244.77254.63004.27641.79891.7768

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 127.931 C1 C2 O4 109.242
C2 C1 H6 108.902 C2 C1 H7 109.488
C2 C1 H8 109.488 C2 O4 C5 113.863
O3 C2 O4 122.827 O4 C5 H9 104.310
O4 C5 H10 110.696 O4 C5 H11 110.696
H6 C1 H7 110.320 H6 C1 H8 110.320
H7 C1 H8 108.307 H9 C5 H10 111.139
H9 C5 H11 111.139 H10 C5 H11 108.827
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability