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

using model chemistry: MP2/CEP-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 MP2/CEP-31G*
 hartrees
Energy at 0K-45.278891
Energy at 298.15K-45.283826
HF Energy-44.694414
Nuclear repulsion energy67.752559
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-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' 3253 3088 21.44      
2 A' 3145 2986 54.95      
3 A' 3115 2957 38.71      
4 A' 1781 1691 306.90      
5 A' 1518 1442 9.84      
6 A' 1491 1415 4.12      
7 A' 1393 1323 0.90      
8 A' 1248 1185 243.96      
9 A' 1197 1136 96.50      
10 A' 946 899 29.51      
11 A' 764 726 8.03      
12 A' 308 293 14.38      
13 A" 3225 3062 28.25      
14 A" 1514 1438 7.67      
15 A" 1191 1131 1.20      
16 A" 1025 973 0.47      
17 A" 345 327 33.11      
18 A" 175 167 0.09      

Unscaled Zero Point Vibrational Energy (zpe) 13817.5 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 13118.3 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-31G*
ABC
0.64222 0.22653 0.17307

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.371 0.400 0.000
O2 0.000 0.897 0.000
C3 -0.939 -0.084 0.000
O4 -0.718 -1.293 0.000
H5 1.995 1.303 0.000
H6 1.550 -0.209 0.900
H7 1.550 -0.209 -0.900
H8 -1.943 0.380 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.45802.35992.68831.09801.10111.10113.3138
O21.45801.35802.30482.03612.10622.10622.0109
C32.35991.35801.22943.24552.65002.65001.1057
O42.68832.30481.22943.75492.67012.67012.0735
H51.09802.03613.24553.75491.81461.81464.0451
H61.10112.10622.65002.67011.81461.79963.6551
H71.10112.10622.65002.67011.81461.79963.6551
H83.31382.01091.10572.07354.04513.65513.6551

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 113.817 O2 C1 H5 104.733
O2 C1 H6 109.996 O2 C1 H7 109.996
O2 C3 O4 125.866 O2 C3 H8 108.982
O4 C3 H8 125.152 H5 C1 H6 111.208
H5 C1 H7 111.208 H6 C1 H7 109.609
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability