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

using model chemistry: CISD/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 CISD/6-31G*
 hartrees
Energy at 0K-228.325891
Energy at 298.15K-228.330490
HF Energy-227.778446
Nuclear repulsion energy120.154638
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 CISD/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' 3295 3050 12.63      
2 A' 3163 2928 42.68      
3 A' 3124 2892 51.53      
4 A' 1969 1823 403.16      
5 A' 1591 1473 18.58      
6 A' 1570 1454 1.17      
7 A' 1511 1399 2.49      
8 A' 1335 1236 274.03      
9 A' 1217 1126 111.08      
10 A' 1109 1026 69.55      
11 A' 664 615 9.80      
12 A' 362 335 0.95      
13 A" 3240 2999 32.39      
14 A" 1592 1473 6.79      
15 A" 1238 1146 1.51      
16 A" 1109 1027 4.01      
17 A" 175 162 0.75      
18 A" 60 56 9.82      

Unscaled Zero Point Vibrational Energy (zpe) 14160.9 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 13110.1 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 CISD/6-31G*
ABC
1.59842 0.15839 0.14817

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.400 0.896 0.000
O2 0.000 0.632 0.000
C3 -0.359 -0.657 0.000
O4 -1.498 -1.011 0.000
H5 1.498 1.975 0.000
H6 1.875 0.489 0.892
H7 1.875 0.489 -0.892
H8 0.492 -1.352 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.42432.34613.46891.08371.08911.08912.4243
O21.42431.33832.22392.01172.08082.08082.0446
C32.34611.33831.19273.22122.66402.66401.0989
O43.46892.22391.19274.23023.79733.79732.0188
H51.08372.01173.22124.23021.77361.77363.4760
H61.08912.08082.66403.79731.77361.78332.4690
H71.08912.08082.66403.79731.77361.78332.4690
H82.42432.04461.09892.01883.47602.46902.4690

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 116.217 O2 C1 H5 105.860
O2 C1 H6 111.062 O2 C1 H7 111.062
O2 C3 O4 122.852 O2 C3 H8 113.688
O4 C3 H8 123.460 H5 C1 H6 109.425
H5 C1 H7 109.425 H6 C1 H7 109.912
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability