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

using model chemistry: QCISD/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 QCISD/6-31G*
 hartrees
Energy at 0K-228.422174
Energy at 298.15K-228.427110
HF Energy-227.785921
Nuclear repulsion energy121.895376
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 QCISD/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' 3211 3058 14.97      
2 A' 3119 2970 50.05      
3 A' 3098 2950 26.47      
4 A' 1839 1751 252.90      
5 A' 1545 1471 8.60      
6 A' 1508 1436 3.27      
7 A' 1433 1365 2.32      
8 A' 1270 1210 268.93      
9 A' 1219 1161 58.91      
10 A' 969 923 23.80      
11 A' 784 747 9.09      
12 A' 315 300 15.58      
13 A" 3182 3030 20.47      
14 A" 1536 1463 6.14      
15 A" 1201 1144 1.70      
16 A" 1051 1001 0.52      
17 A" 343 327 30.89      
18 A" 155 148 0.04      

Unscaled Zero Point Vibrational Energy (zpe) 13889.3 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 13226.8 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 QCISD/6-31G*
ABC
0.65888 0.23007 0.17625

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.360 0.413 0.000
O2 0.000 0.876 0.000
C3 -0.929 -0.090 0.000
O4 -0.720 -1.282 0.000
H5 1.976 1.314 0.000
H6 1.562 -0.189 0.892
H7 1.562 -0.189 -0.892
H8 -1.930 0.370 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.43652.34382.68311.09141.09481.09483.2903
O21.43651.34042.27472.02422.09022.09021.9952
C32.34381.34041.20983.22692.64782.64781.1019
O42.68312.27471.20983.74272.68282.68282.0481
H51.09142.02423.22693.74271.79601.79604.0186
H61.09482.09022.64782.68281.79601.78363.6473
H71.09482.09022.64782.68281.79601.78363.6473
H83.29031.99521.10192.04814.01863.64733.6473

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 115.087 O2 C1 H5 105.586
O2 C1 H6 110.600 O2 C1 H7 110.600
O2 C3 O4 126.166 O2 C3 H8 109.164
O4 C3 H8 124.670 H5 C1 H6 110.466
H5 C1 H7 110.466 H6 C1 H7 109.092
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability