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

using model chemistry: CCSD/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 CCSD/cc-pVTZ
 hartrees
Energy at 0K-228.692457
Energy at 298.15K-228.697416
HF Energy-227.876977
Nuclear repulsion energy122.846633
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 CCSD/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' 3194 3006 12.85      
2 A' 3107 2925 43.39      
3 A' 3084 2903 26.42      
4 A' 1844 1735 286.43      
5 A' 1524 1435 10.33      
6 A' 1493 1405 3.73      
7 A' 1427 1344 1.49      
8 A' 1273 1198 285.16      
9 A' 1217 1145 53.52      
10 A' 978 921 25.35      
11 A' 791 744 8.34      
12 A' 314 296 14.29      
13 A" 3164 2978 18.11      
14 A" 1511 1422 8.05      
15 A" 1201 1131 1.89      
16 A" 1076 1013 0.05      
17 A" 341 321 26.93      
18 A" 151 142 0.12      

Unscaled Zero Point Vibrational Energy (zpe) 13845.0 cm-1
Scaled (by 0.9412) Zero Point Vibrational Energy (zpe) 13030.9 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 CCSD/cc-pVTZ
ABC
0.67072 0.23329 0.17890

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.350 0.404 0.000
O2 0.000 0.871 0.000
C3 -0.923 -0.087 0.000
O4 -0.714 -1.267 0.000
H5 1.972 1.292 0.000
H6 1.547 -0.197 0.886
H7 1.547 -0.197 -0.886
H8 -1.918 0.368 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.42842.32482.65461.08461.08801.08803.2674
O21.42841.33042.25382.01662.07792.07791.9824
C32.32481.33041.19783.20662.62582.62581.0942
O42.65462.25381.19783.70932.65282.65282.0304
H51.08462.01663.20663.70931.78381.78383.9979
H61.08802.07792.62582.65281.78381.77123.6201
H71.08802.07792.62582.65281.78381.77123.6201
H83.26741.98241.09422.03043.99793.62013.6201

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 114.803 O2 C1 H5 105.917
O2 C1 H6 110.600 O2 C1 H7 110.600
O2 C3 O4 126.032 O2 C3 H8 109.307
O4 C3 H8 124.660 H5 C1 H6 110.371
H5 C1 H7 110.371 H6 C1 H7 108.963
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability