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: QCISD(T)/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD(T)/6-31G*
 hartrees
Energy at 0K-267.632757
Energy at 298.15K-267.639546
HF Energy-266.832327
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(T)/6-31G*
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' 3189 3060        
2 A' 3189 3059        
3 A' 3078 2953        
4 A' 3076 2951        
5 A' 1833 1758        
6 A' 1538 1476        
7 A' 1518 1457        
8 A' 1501 1440        
9 A' 1440 1381        
10 A' 1314 1260        
11 A' 1226 1176        
12 A' 1097 1052        
13 A' 1006 965        
14 A' 867 832        
15 A' 648 622        
16 A' 426 408        
17 A' 291 279        
18 A" 3162 3033        
19 A" 3152 3023        
20 A" 1528 1466        
21 A" 1518 1456        
22 A" 1191 1143        
23 A" 1085 1041        
24 A" 600 576        
25 A" 180 173        
26 A" 160 153        
27 A" 59 57        

Unscaled Zero Point Vibrational Energy (zpe) 19934.9 cm-1
Scaled (by 0.9593) Zero Point Vibrational Energy (zpe) 19123.6 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 QCISD(T)/6-31G*
ABC
0.33592 0.13859 0.10190

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.121 1.505 0.000
C2 0.000 0.492 0.000
O3 -1.192 0.746 0.000
O4 0.497 -0.774 0.000
C5 -0.517 -1.803 0.000
H6 0.694 2.511 0.000
H7 1.751 1.362 0.886
H8 1.751 1.362 -0.886
H9 0.035 -2.746 0.000
H10 -1.146 -1.720 0.893
H11 -1.146 -1.720 -0.893

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 H6 H7 H8 H9 H10 H11
C11.51072.43392.36273.69141.09321.09671.09674.38784.04214.0421
C21.51071.21841.35982.35282.13492.14662.14663.23862.64672.6467
O32.43391.21842.27162.63702.58263.13443.13443.70152.62332.6233
O42.36271.35982.27161.44473.29082.63062.63062.02592.09552.0955
C53.69142.35282.63701.44474.48103.99343.99341.09271.09521.0952
H61.09322.13492.58263.29084.48101.79561.79565.29864.69964.6996
H71.09672.14663.13442.63063.99341.79561.77234.53964.23014.5889
H81.09672.14663.13442.63063.99341.79561.77234.53964.58894.2301
H94.38783.23863.70152.02591.09275.29864.53964.53961.80111.8011
H104.04212.64672.62332.09551.09524.69964.23014.58891.80111.7852
H114.04212.64672.62332.09551.09524.69964.58894.23011.80111.7852

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 125.870 C1 C2 O4 110.680
C2 C1 H6 109.092 C2 C1 H7 109.807
C2 C1 H8 109.807 C2 O4 C5 114.023
O3 C2 O4 123.450 O4 C5 H9 105.114
O4 C5 H10 110.432 O4 C5 H11 110.432
H6 C1 H7 110.159 H6 C1 H8 110.159
H7 C1 H8 107.802 H9 C5 H10 110.820
H9 C5 H11 110.820 H10 C5 H11 109.180
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability