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 CH3COOCH3 (methyl acetate)

using model chemistry: CCD/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 CCD/3-21G*
 hartrees
Energy at 0K-265.881330
Energy at 298.15K-265.888076
HF Energy-265.343467
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 CCD/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' 3166 3028 7.31      
2 A' 3161 3023 16.39      
3 A' 3069 2936 2.05      
4 A' 3058 2925 18.12      
5 A' 1805 1727 122.27      
6 A' 1585 1516 6.64      
7 A' 1556 1489 15.67      
8 A' 1515 1449 3.89      
9 A' 1463 1400 24.68      
10 A' 1276 1220 336.75      
11 A' 1207 1154 8.36      
12 A' 1093 1045 66.77      
13 A' 988 945 1.74      
14 A' 822 786 18.93      
15 A' 639 611 7.92      
16 A' 410 392 6.21      
17 A' 273 261 13.08      
18 A" 3132 2995 5.51      
19 A" 3119 2983 26.64      
20 A" 1569 1501 5.89      
21 A" 1561 1493 7.44      
22 A" 1186 1135 0.67      
23 A" 1119 1071 8.90      
24 A" 595 569 7.68      
25 A" 168 161 10.57      
26 A" 118 113 0.16      
27 A" 106 102 0.66      

Unscaled Zero Point Vibrational Energy (zpe) 19878.9 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 19014.1 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 CCD/3-21G*
ABC
0.32749 0.13473 0.09904

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.156 1.507 0.000
C2 0.000 0.518 0.000
O3 -1.200 0.771 0.000
O4 0.494 -0.779 0.000
C5 -0.544 -1.834 0.000
H6 0.755 2.524 0.000
H7 1.777 1.341 0.889
H8 1.777 1.341 -0.889
H9 0.016 -2.772 0.000
H10 -1.177 -1.756 0.891
H11 -1.177 -1.756 -0.891

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 H6 H7 H8 H9 H10 H11
C11.52102.46802.38003.74791.09361.09691.09694.42804.10934.1093
C21.52101.22581.38852.41402.14352.15052.15053.29042.71192.7119
O32.46801.22582.29582.68562.62633.15853.15853.74542.67972.6797
O42.38001.38852.29581.47923.31402.63272.63272.04922.13122.1312
C53.74792.41402.68561.47924.54744.03154.03151.09261.09641.0964
H61.09362.14352.62633.31404.54741.79851.79855.34774.78054.7805
H71.09692.15053.15852.63274.03151.79851.77764.56144.28024.6356
H81.09692.15053.15852.63274.03151.79851.77764.56144.63564.2802
H94.42803.29043.74542.04921.09265.34774.56144.56141.80281.8028
H104.10932.71192.67972.13121.09644.78054.28024.63561.80281.7829
H114.10932.71192.67972.13121.09644.78054.63564.28021.80281.7829

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 127.594 C1 C2 O4 109.690
C2 C1 H6 109.040 C2 C1 H7 109.392
C2 C1 H8 109.392 C2 O4 C5 114.617
O3 C2 O4 122.715 O4 C5 H9 104.646
O4 C5 H10 110.799 O4 C5 H11 110.799
H6 C1 H7 110.378 H6 C1 H8 110.378
H7 C1 H8 108.243 H9 C5 H10 110.888
H9 C5 H11 110.888 H10 C5 H11 108.795
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability