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

using model chemistry: CISD/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 CISD/6-31G*
 hartrees
Energy at 0K-267.485528
Energy at 298.15K-267.492507
HF Energy-266.836035
Nuclear repulsion energy181.942132
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 CISD/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' 3303 3058 19.52      
2 A' 3301 3056 5.17      
3 A' 3194 2957 26.74      
4 A' 3185 2949 2.17      
5 A' 1947 1802 265.47      
6 A' 1596 1477 7.08      
7 A' 1574 1457 26.10      
8 A' 1566 1450 10.01      
9 A' 1505 1393 83.57      
10 A' 1389 1286 361.38      
11 A' 1285 1190 1.72      
12 A' 1165 1079 64.98      
13 A' 1055 976 3.26      
14 A' 921 853 17.96      
15 A' 679 628 10.30      
16 A' 443 410 7.27      
17 A' 300 277 13.51      
18 A" 3280 3037 22.44      
19 A" 3260 3018 5.40      
20 A" 1586 1468 5.78      
21 A" 1570 1453 7.59      
22 A" 1248 1155 2.19      
23 A" 1136 1052 9.30      
24 A" 639 592 10.63      
25 A" 188 174 6.93      
26 A" 161 149 1.41      
27 A" 87 80 0.39      

Unscaled Zero Point Vibrational Energy (zpe) 20780.0 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 19238.1 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 CISD/6-31G*
ABC
0.34475 0.14039 0.10360

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.120 1.488 0.000
C2 0.000 0.488 0.000
O3 -1.173 0.751 0.000
O4 0.474 -0.765 0.000
C5 -0.514 -1.793 0.000
H6 0.708 2.491 0.000
H7 1.744 1.340 0.878
H8 1.744 1.340 -0.878
H9 0.037 -2.726 0.000
H10 -1.139 -1.720 0.885
H11 -1.139 -1.720 -0.885

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 H6 H7 H8 H9 H10 H11
C11.50112.40812.34363.66531.08401.08781.08784.35084.02204.0220
C21.50111.20181.33982.33852.12362.13052.13053.21442.63752.6375
O32.40811.20182.23822.62792.56163.10283.10283.68142.62472.6247
O42.34361.33982.23821.42603.26372.61042.61042.00922.07302.0730
C53.66532.33852.62791.42604.45443.96063.96061.08351.08571.0857
H61.08402.12362.56163.26374.45441.78061.78065.25944.68204.6820
H71.08782.13053.10282.61043.96061.78061.75634.49624.20444.5590
H81.08782.13053.10282.61043.96061.78061.75634.49624.55904.2044
H94.35083.21443.68142.00921.08355.25944.49624.49621.78281.7828
H104.02202.63752.62472.07301.08574.68204.20444.55901.78281.7693
H114.02202.63752.62472.07301.08574.68204.55904.20441.78281.7693

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 125.619 C1 C2 O4 111.034
C2 C1 H6 109.404 C2 C1 H7 109.728
C2 C1 H8 109.728 C2 O4 C5 115.416
O3 C2 O4 123.347 O4 C5 H9 105.565
O4 C5 H10 110.513 O4 C5 H11 110.513
H6 C1 H7 110.148 H6 C1 H8 110.148
H7 C1 H8 107.664 H9 C5 H10 110.539
H9 C5 H11 110.539 H10 C5 H11 109.139
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability