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

using model chemistry: QCISD/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 QCISD/3-21G*
 hartrees
Energy at 0K-265.892360
Energy at 298.15K-265.899030
HF Energy-265.342092
Nuclear repulsion energy 
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 QCISD/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' 3154 3031 7.58      
2 A' 3150 3028 15.81      
3 A' 3057 2938 2.33      
4 A' 3048 2929 19.13      
5 A' 1750 1682 116.18      
6 A' 1579 1518 7.01      
7 A' 1551 1490 17.96      
8 A' 1504 1446 3.59      
9 A' 1458 1401 21.72      
10 A' 1256 1207 304.47      
11 A' 1197 1151 9.16      
12 A' 1076 1034 81.52      
13 A' 971 933 2.72      
14 A' 804 773 16.71      
15 A' 629 605 7.13      
16 A' 405 389 6.28      
17 A' 270 259 12.95      
18 A" 3119 2998 5.66      
19 A" 3110 2989 25.82      
20 A" 1563 1502 5.82      
21 A" 1557 1496 7.22      
22 A" 1178 1132 0.61      
23 A" 1113 1069 8.66      
24 A" 589 566 7.79      
25 A" 169 163 10.34      
26 A" 105 101 0.31      
27 A" 95 91 0.50      

Unscaled Zero Point Vibrational Energy (zpe) 19727.2 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 18959.8 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 QCISD/3-21G*
ABC
0.32443 0.13431 0.09854

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.158 1.510 0.000
C2 0.000 0.520 0.000
O3 -1.207 0.770 0.000
O4 0.501 -0.781 0.000
C5 -0.545 -1.837 0.000
H6 0.757 2.528 0.000
H7 1.779 1.344 0.889
H8 1.779 1.344 -0.889
H9 0.014 -2.776 0.000
H10 -1.178 -1.755 0.892
H11 -1.178 -1.755 -0.892

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 H6 H7 H8 H9 H10 H11
C11.52352.47812.38393.75561.09411.09751.09754.43634.11264.1126
C21.52351.23261.39442.41942.14582.15322.15323.29632.71292.7129
O32.47811.23262.30712.68992.63583.16843.16843.75062.67832.6783
O42.38391.39442.30711.48593.31932.63522.63522.05332.13572.1357
C53.75562.41942.68991.48594.55514.03924.03921.09301.09671.0967
H61.09412.14582.63583.31934.55511.79931.79935.35594.78384.7838
H71.09752.15323.16842.63524.03921.79931.77874.57004.28394.6395
H81.09752.15323.16842.63524.03921.79931.77874.57004.63954.2839
H94.43633.29633.75062.05331.09305.35594.57004.57001.80521.8052
H104.11262.71292.67832.13571.09674.78384.28394.63951.80521.7840
H114.11262.71292.67832.13571.09674.78384.63954.28391.80521.7840

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 127.773 C1 C2 O4 109.489
C2 C1 H6 109.021 C2 C1 H7 109.399
C2 C1 H8 109.399 C2 O4 C5 114.235
O3 C2 O4 122.738 O4 C5 H9 104.499
O4 C5 H10 110.667 O4 C5 H11 110.667
H6 C1 H7 110.372 H6 C1 H8 110.372
H7 C1 H8 108.260 H9 C5 H10 111.061
H9 C5 H11 111.061 H10 C5 H11 108.855
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability