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

using model chemistry: MP2/aug-cc-pVDZ

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/aug-cc-pVDZ
 hartrees
Energy at 0K-228.495907
Energy at 298.15K-228.500837
Nuclear repulsion energy121.380057
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/aug-cc-pVDZ
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' 3229 3097 9.43      
2 A' 3126 2997 39.06      
3 A' 3094 2967 26.10      
4 A' 1745 1673 284.58      
5 A' 1488 1427 9.71      
6 A' 1450 1391 3.74      
7 A' 1383 1326 1.29      
8 A' 1222 1172 207.94      
9 A' 1173 1125 119.01      
10 A' 935 897 27.32      
11 A' 761 729 7.05      
12 A' 306 293 13.70      
13 A" 3193 3062 14.42      
14 A" 1481 1420 8.78      
15 A" 1171 1123 1.75      
16 A" 1030 988 0.19      
17 A" 343 329 25.65      
18 A" 164 158 0.17      

Unscaled Zero Point Vibrational Energy (zpe) 13646.3 cm-1
Scaled (by 0.959) Zero Point Vibrational Energy (zpe) 13086.8 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 MP2/aug-cc-pVDZ
ABC
0.64831 0.22948 0.17520

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.364 0.395 0.000
O2 0.000 0.892 0.000
C3 -0.936 -0.083 0.000
O4 -0.713 -1.281 0.000
H5 1.995 1.290 0.000
H6 1.543 -0.214 0.897
H7 1.543 -0.214 -0.897
H8 -1.940 0.376 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.45172.34902.66841.09511.09851.09853.3034
O21.45171.35222.28722.03382.09952.09952.0072
C32.34901.35221.21823.23642.63942.63941.1036
O42.66842.28721.21823.73352.65182.65182.0615
H51.09512.03383.23643.73351.80811.80814.0390
H61.09852.09952.63942.65181.80811.79403.6441
H71.09852.09952.63942.65181.80811.79403.6441
H83.30342.00721.10362.06154.03903.64413.6441

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 113.766 O2 C1 H5 105.128
O2 C1 H6 110.059 O2 C1 H7 110.059
O2 C3 O4 125.628 O2 C3 H8 109.222
O4 C3 H8 125.150 H5 C1 H6 111.025
H5 C1 H7 111.025 H6 C1 H7 109.477
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability