return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: MP2/TZVP

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/TZVP
 hartrees
Energy at 0K-228.552446
Energy at 298.15K-228.557405
HF Energy-227.868681
Nuclear repulsion energy122.288316
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/TZVP
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' 3243 3074 10.44      
2 A' 3130 2967 42.64      
3 A' 3112 2950 28.24      
4 A' 1786 1693 279.53      
5 A' 1528 1448 10.17      
6 A' 1507 1429 2.58      
7 A' 1440 1365 1.22      
8 A' 1260 1194 207.59      
9 A' 1211 1148 136.19      
10 A' 961 911 28.12      
11 A' 785 744 7.98      
12 A' 313 297 13.66      
13 A" 3205 3038 17.17      
14 A" 1510 1431 7.72      
15 A" 1204 1141 2.08      
16 A" 1043 989 0.00      
17 A" 343 326 28.00      
18 A" 159 150 0.15      

Unscaled Zero Point Vibrational Energy (zpe) 13870.0 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 13147.4 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/TZVP
ABC
0.66425 0.23113 0.17718

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.356 0.401 0.000
O2 0.000 0.881 0.000
C3 -0.930 -0.087 0.000
O4 -0.713 -1.274 0.000
H5 1.976 1.290 0.000
H6 1.545 -0.200 0.887
H7 1.545 -0.200 -0.887
H8 -1.923 0.371 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.43832.33732.66191.08431.08791.08793.2795
O21.43831.34172.26962.01832.08392.08391.9897
C32.33731.34171.20733.21592.63182.63181.0937
O42.66192.26961.20733.71582.65312.65312.0426
H51.08432.01833.21593.71581.78701.78704.0065
H61.08792.08392.63182.65311.78701.77363.6256
H71.08792.08392.63182.65311.78701.77363.6256
H83.27951.98971.09372.04264.00653.62563.6256

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 114.396 O2 C1 H5 105.417
O2 C1 H6 110.388 O2 C1 H7 110.388
O2 C3 O4 125.759 O2 C3 H8 109.145
O4 C3 H8 125.096 H5 C1 H6 110.705
H5 C1 H7 110.705 H6 C1 H7 109.201
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability