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

using model chemistry: MP2/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/CEP-121G*
 hartrees
Energy at 0K-45.325724
Energy at 298.15K-45.330643
HF Energy-44.702378
Nuclear repulsion energy67.994507
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 MP2/CEP-121G*
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' 3240 3087 14.59      
2 A' 3130 2982 47.76      
3 A' 3099 2952 30.01      
4 A' 1751 1668 287.06      
5 A' 1533 1460 8.50      
6 A' 1497 1426 4.76      
7 A' 1405 1339 1.01      
8 A' 1244 1186 210.67      
9 A' 1198 1141 129.88      
10 A' 945 900 30.43      
11 A' 763 727 7.66      
12 A' 310 295 14.22      
13 A" 3206 3055 21.79      
14 A" 1523 1451 7.67      
15 A" 1188 1132 1.93      
16 A" 1022 974 0.22      
17 A" 344 328 30.53      
18 A" 156 149 0.09      

Unscaled Zero Point Vibrational Energy (zpe) 13775.8 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 13125.6 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 MP2/CEP-121G*
ABC
0.64568 0.22810 0.17415

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.368 0.397 0.000
O2 0.000 0.895 0.000
C3 -0.940 -0.084 0.000
O4 -0.714 -1.286 0.000
H5 1.988 1.292 0.000
H6 1.546 -0.206 0.893
H7 1.546 -0.206 -0.893
H8 -1.938 0.375 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.45622.35762.67791.08881.09211.09213.3060
O21.45621.35732.29562.02762.09792.09792.0062
C32.35761.35731.22323.23542.64422.64421.0985
O42.67792.29561.22323.73542.65962.65962.0633
H51.08882.02763.23543.73541.79931.79934.0317
H61.09212.09792.64422.65961.79931.78533.6431
H71.09212.09792.64422.65961.79931.78533.6431
H83.30602.00621.09852.06334.03173.64313.6431

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 113.808 O2 C1 H5 104.708
O2 C1 H6 110.005 O2 C1 H7 110.005
O2 C3 O4 125.567 O2 C3 H8 109.103
O4 C3 H8 125.330 H5 C1 H6 111.187
H5 C1 H7 111.187 H6 C1 H7 109.655
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability