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All results from a given calculation for CH3OCHO (methyl formate)

using model chemistry: MP3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP3/6-31G*
 hartrees
Energy at 0K-228.406069
Energy at 298.15K-228.411037
HF Energy-227.787256
Nuclear repulsion energy122.391674
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 MP3/6-31G*
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' 3247 3048 13.23      
2 A' 3154 2960 45.57      
3 A' 3131 2938 23.96      
4 A' 1898 1781 279.34      
5 A' 1557 1462 9.63      
6 A' 1525 1432 3.56      
7 A' 1455 1366 3.46      
8 A' 1300 1220 313.46      
9 A' 1237 1161 34.65      
10 A' 994 933 25.82      
11 A' 800 751 10.00      
12 A' 319 300 16.15      
13 A" 3216 3018 18.53      
14 A" 1548 1453 6.81      
15 A" 1215 1140 1.69      
16 A" 1071 1005 0.55      
17 A" 343 322 31.90      
18 A" 159 149 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 14083.2 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 13218.5 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 MP3/6-31G*
ABC
0.66573 0.23163 0.17762

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.356 0.400 0.000
O2 0.000 0.878 0.000
C3 -0.930 -0.086 0.000
O4 -0.712 -1.270 0.000
H5 1.976 1.294 0.000
H6 1.546 -0.203 0.890
H7 1.546 -0.203 -0.890
H8 -1.930 0.365 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.43762.33662.65791.08851.09161.09163.2858
O21.43761.33902.26292.01972.08592.08591.9967
C32.33661.33901.20443.21712.63392.63391.0971
O42.65792.26291.20443.71522.65182.65182.0393
H51.08852.01973.21713.71521.79371.79374.0151
H61.09162.08592.63392.65181.79371.78003.6330
H71.09162.08592.63392.65181.79371.78003.6330
H83.28581.99671.09712.03934.01513.63303.6330

picture of methyl formate state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 C3 114.561 O2 C1 H5 105.339
O2 C1 H6 110.378 O2 C1 H7 110.378
O2 C3 O4 125.599 O2 C3 H8 109.697
O4 C3 H8 124.704 H5 C1 H6 110.729
H5 C1 H7 110.729 H6 C1 H7 109.247
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability