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

using model chemistry: CID/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 CID/3-21G*
 hartrees
Energy at 0K-265.809501
Energy at 298.15K-265.816337
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 CID/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' 3254 3027 6.49      
2 A' 3253 3027 15.24      
3 A' 3154 2935 0.40      
4 A' 3149 2930 19.43      
5 A' 1857 1728 158.02      
6 A' 1625 1512 7.19      
7 A' 1589 1479 18.44      
8 A' 1559 1451 5.23      
9 A' 1505 1400 29.91      
10 A' 1319 1228 382.33      
11 A' 1245 1159 4.81      
12 A' 1130 1051 71.24      
13 A' 1019 948 2.89      
14 A' 853 794 17.95      
15 A' 657 611 9.31      
16 A' 419 390 6.92      
17 A' 277 258 14.53      
18 A" 3216 2993 4.96      
19 A" 3214 2990 23.96      
20 A" 1609 1498 6.49      
21 A" 1597 1486 8.50      
22 A" 1222 1138 0.90      
23 A" 1152 1072 11.85      
24 A" 619 576 9.94      
25 A" 174 162 11.55      
26 A" 119 111 0.20      
27 A" 108 100 0.64      

Unscaled Zero Point Vibrational Energy (zpe) 20446.7 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 19025.7 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 CID/3-21G*
ABC
0.33276 0.13594 0.10012

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.149 1.498 0.000
C2 0.000 0.516 0.000
O3 -1.191 0.770 0.000
O4 0.482 -0.771 0.000
C5 -0.535 -1.830 0.000
H6 0.755 2.510 0.000
H7 1.767 1.331 0.882
H8 1.767 1.331 -0.882
H9 0.028 -2.758 0.000
H10 -1.165 -1.758 0.886
H11 -1.165 -1.758 -0.886

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 H6 H7 H8 H9 H10 H11
C11.51152.45072.36553.73011.08641.09011.09014.40094.09134.0913
C21.51151.21781.37492.40662.13212.13682.13683.27392.70402.7040
O32.45071.21782.27502.68182.61013.13743.13743.73262.67892.6789
O42.36551.37492.27501.46833.29302.61762.61762.03742.11392.1139
C53.73012.40662.68181.46834.52804.00934.00931.08521.08881.0888
H61.08642.13212.61013.29304.52801.78711.78715.31784.76284.7628
H71.09012.13683.13742.61764.00931.78711.76504.53024.25884.6113
H81.09012.13683.13742.61764.00931.78711.76504.53024.61134.2588
H94.40093.27393.73262.03741.08525.31784.53024.53021.79051.7905
H104.09132.70402.67892.11391.08884.76284.25884.61131.79051.7713
H114.09132.70402.67892.11391.08884.76284.61134.25881.79051.7713

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 127.446 C1 C2 O4 109.984
C2 C1 H6 109.212 C2 C1 H7 109.368
C2 C1 H8 109.368 C2 O4 C5 115.616
O3 C2 O4 122.570 O4 C5 H9 104.869
O4 C5 H10 110.645 O4 C5 H11 110.645
H6 C1 H7 110.384 H6 C1 H8 110.384
H7 C1 H8 108.102 H9 C5 H10 110.898
H9 C5 H11 110.898 H10 C5 H11 108.859
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability