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

using model chemistry: MP2/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-228.695040
Energy at 298.15K-228.699982
HF Energy-227.879075
Nuclear repulsion energy122.416019
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/aug-cc-pVTZ
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' 3224 3072 7.38      
2 A' 3113 2966 35.13      
3 A' 3096 2950 25.58      
4 A' 1768 1685 288.74      
5 A' 1519 1448 10.42      
6 A' 1479 1409 3.95      
7 A' 1399 1333 1.31      
8 A' 1247 1188 240.49      
9 A' 1193 1137 87.56      
10 A' 954 909 27.33      
11 A' 772 735 7.47      
12 A' 308 294 13.80      
13 A" 3189 3039 11.61      
14 A" 1512 1441 9.63      
15 A" 1187 1131 1.59      
16 A" 1046 997 0.14      
17 A" 347 330 25.53      
18 A" 155 148 0.14      

Unscaled Zero Point Vibrational Energy (zpe) 13754.0 cm-1
Scaled (by 0.9529) Zero Point Vibrational Energy (zpe) 13106.2 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/aug-cc-pVTZ
ABC
0.66082 0.23294 0.17799

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.352 0.404 0.000
O2 0.000 0.876 0.000
C3 -0.925 -0.087 0.000
O4 -0.713 -1.273 0.000
H5 1.974 1.292 0.000
H6 1.544 -0.197 0.886
H7 1.544 -0.197 -0.886
H8 -1.919 0.373 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.43172.32862.66021.08391.08781.08783.2704
O21.43171.33462.26422.01712.07842.07841.9833
C32.32861.33461.20523.20942.62512.62511.0951
O42.66022.26421.20523.71452.65292.65292.0404
H51.08392.01713.20943.71451.78491.78493.9992
H61.08782.07842.62512.65291.78491.77213.6192
H71.08782.07842.62512.65291.78491.77213.6192
H83.27041.98331.09512.04043.99923.61923.6192

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 114.606 O2 C1 H5 105.777
O2 C1 H6 110.421 O2 C1 H7 110.421
O2 C3 O4 126.049 O2 C3 H8 109.023
O4 C3 H8 124.928 H5 C1 H6 110.552
H5 C1 H7 110.552 H6 C1 H7 109.091
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability