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

using model chemistry: MP2=FULL/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=FULL/aug-cc-pVTZ
 hartrees
Energy at 0K-228.761622
Energy at 298.15K-228.766591
HF Energy-227.879977
Nuclear repulsion energy122.833133
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=FULL/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' 3222 3065 7.29      
2 A' 3115 2964 14.04      
3 A' 3111 2960 46.92      
4 A' 1782 1696 291.65      
5 A' 1529 1455 10.75      
6 A' 1485 1412 4.15      
7 A' 1407 1338 1.65      
8 A' 1257 1196 244.73      
9 A' 1200 1141 82.13      
10 A' 962 915 27.33      
11 A' 777 739 7.73      
12 A' 310 295 13.97      
13 A" 3188 3033 11.35      
14 A" 1525 1451 10.01      
15 A" 1198 1140 1.50      
16 A" 1068 1016 0.11      
17 A" 352 335 25.41      
18 A" 160 152 0.12      

Unscaled Zero Point Vibrational Energy (zpe) 13824.2 cm-1
Scaled (by 0.9514) Zero Point Vibrational Energy (zpe) 13152.4 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=FULL/aug-cc-pVTZ
ABC
0.66632 0.23430 0.17915

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.346 0.401 0.000
O2 0.000 0.874 0.000
C3 -0.921 -0.086 0.000
O4 -0.710 -1.268 0.000
H5 1.970 1.285 0.000
H6 1.535 -0.199 0.884
H7 1.535 -0.199 -0.884
H8 -1.911 0.374 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.42712.31892.64871.08161.08521.08523.2572
O21.42711.33022.25732.01212.07132.07131.9751
C32.31891.33021.20153.19922.61272.61271.0913
O42.64872.25731.20153.70152.63922.63922.0346
H51.08162.01213.19923.70151.78141.78143.9860
H61.08522.07132.61272.63921.78141.76853.6033
H71.08522.07132.61272.63921.78141.76853.6033
H83.25721.97511.09132.03463.98603.60333.6033

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 114.450 O2 C1 H5 105.827
O2 C1 H6 110.325 O2 C1 H7 110.325
O2 C3 O4 126.074 O2 C3 H8 108.907
O4 C3 H8 125.018 H5 C1 H6 110.595
H5 C1 H7 110.595 H6 C1 H7 109.143
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability