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

using model chemistry: MP2=FULL/3-21G

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/3-21G
 hartrees
Energy at 0K-226.946045
Energy at 298.15K-226.950810
HF Energy-226.508827
Nuclear repulsion energy119.358706
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/3-21G
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' 3230 3084 11.86      
2 A' 3125 2983 51.39      
3 A' 3109 2968 22.17      
4 A' 1678 1602 138.84      
5 A' 1601 1529 7.57      
6 A' 1517 1449 10.56      
7 A' 1439 1374 1.83      
8 A' 1208 1153 64.51      
9 A' 1161 1108 238.05      
10 A' 898 857 10.04      
11 A' 755 721 10.76      
12 A' 289 276 15.35      
13 A" 3181 3037 22.13      
14 A" 1589 1517 6.77      
15 A" 1192 1139 0.75      
16 A" 1054 1007 0.11      
17 A" 331 316 32.51      
18 A" 92 88 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 13724.3 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 13104.0 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/3-21G
ABC
0.62392 0.22137 0.16861

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.399 0.393 0.000
O2 0.000 0.909 0.000
C3 -0.965 -0.084 0.000
O4 -0.731 -1.297 0.000
H5 2.018 1.287 0.000
H6 1.583 -0.214 0.889
H7 1.583 -0.214 -0.889
H8 -1.948 0.391 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.49182.41142.71891.08761.09211.09213.3474
O21.49181.38432.32462.05262.13522.13522.0158
C32.41141.38431.23633.28212.70122.70121.0921
O42.71892.32461.23633.77272.70462.70462.0818
H51.08762.05263.28213.77271.79871.79874.0655
H61.09212.13522.70122.70461.79871.77823.6911
H71.09212.13522.70122.70461.79871.77823.6911
H83.34742.01581.09212.08184.06553.69113.6911

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 113.896 O2 C1 H5 104.364
O2 C1 H6 110.498 O2 C1 H7 110.498
O2 C3 O4 124.921 O2 C3 H8 108.397
O4 C3 H8 126.681 H5 C1 H6 111.215
H5 C1 H7 111.215 H6 C1 H7 109.001
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability