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

using model chemistry: MP3=FULL/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=FULL/6-31G*
 hartrees
Energy at 0K-228.420632
Energy at 298.15K-228.425608
HF Energy-227.787429
Nuclear repulsion energy122.491663
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=FULL/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' 3248 3048 13.11      
2 A' 3155 2961 45.70      
3 A' 3132 2938 23.89      
4 A' 1901 1784 279.88      
5 A' 1558 1462 9.79      
6 A' 1527 1433 3.65      
7 A' 1456 1366 3.42      
8 A' 1302 1222 313.57      
9 A' 1238 1162 33.74      
10 A' 995 934 25.87      
11 A' 801 752 10.08      
12 A' 320 300 16.18      
13 A" 3216 3018 18.38      
14 A" 1549 1454 6.95      
15 A" 1217 1141 1.65      
16 A" 1073 1007 0.56      
17 A" 345 324 31.80      
18 A" 161 151 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 14097.3 cm-1
Scaled (by 0.9383) Zero Point Vibrational Energy (zpe) 13227.5 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=FULL/6-31G*
ABC
0.66673 0.23207 0.17795

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.354 0.407 0.000
O2 0.000 0.873 0.000
C3 -0.926 -0.088 0.000
O4 -0.715 -1.272 0.000
H5 1.972 1.304 0.000
H6 1.553 -0.194 0.890
H7 1.553 -0.194 -0.890
H8 -1.926 0.368 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.43162.33312.66441.08881.09231.09233.2804
O21.43161.33432.26102.01832.08372.08371.9913
C32.33311.33431.20343.21472.63622.63621.0991
O42.66442.26101.20343.72182.66392.66392.0395
H51.08882.01833.21473.72181.79181.79184.0088
H61.09232.08372.63622.66391.79181.77963.6351
H71.09232.08372.63622.66391.79181.77963.6351
H83.28041.99131.09912.03954.00883.63513.6351

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 114.985 O2 C1 H5 105.605
O2 C1 H6 110.580 O2 C1 H7 110.580
O2 C3 O4 125.909 O2 C3 H8 109.455
O4 C3 H8 124.636 H5 C1 H6 110.474
H5 C1 H7 110.474 H6 C1 H7 109.098
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability