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

using model chemistry: MP2=FULL/6-31G(2df,p)

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=FULL/6-31G(2df,p)
 hartrees
Energy at 0K-228.592465
Energy at 298.15K-228.597450
HF Energy-227.811410
Nuclear repulsion energy122.943834
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=FULL/6-31G(2df,p)
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' 3260 3064 7.35      
2 A' 3134 2946 12.38      
3 A' 3120 2933 52.49      
4 A' 1825 1716 233.58      
5 A' 1539 1447 10.24      
6 A' 1498 1408 4.01      
7 A' 1424 1338 1.02      
8 A' 1269 1193 239.92      
9 A' 1215 1142 58.96      
10 A' 982 923 21.07      
11 A' 789 741 8.07      
12 A' 313 294 14.03      
13 A" 3232 3038 10.91      
14 A" 1529 1437 8.13      
15 A" 1209 1136 0.96      
16 A" 1074 1009 0.10      
17 A" 358 337 23.36      
18 A" 162 153 0.10      

Unscaled Zero Point Vibrational Energy (zpe) 13965.1 cm-1
Scaled (by 0.9399) Zero Point Vibrational Energy (zpe) 13125.8 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=FULL/6-31G(2df,p)
ABC
0.66440 0.23572 0.17984

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.339 0.394 0.000
O2 0.000 0.880 0.000
C3 -0.915 -0.084 0.000
O4 -0.709 -1.267 0.000
H5 1.971 1.276 0.000
H6 1.530 -0.210 0.885
H7 1.530 -0.210 -0.885
H8 -1.908 0.383 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.42492.30462.63691.08481.08801.08803.2470
O21.42491.32882.26072.01052.07652.07651.9712
C32.30461.32881.20113.19032.60352.60351.0966
O42.63692.26071.20113.69422.62942.62942.0393
H51.08482.01053.19033.69421.78441.78443.9801
H61.08802.07652.60352.62941.78441.76983.5989
H71.08802.07652.60352.62941.78441.76983.5989
H83.24701.97121.09662.03933.98013.59893.5989

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 113.579 O2 C1 H5 105.668
O2 C1 H6 110.734 O2 C1 H7 110.734
O2 C3 O4 126.588 O2 C3 H8 108.344
O4 C3 H8 125.068 H5 C1 H6 110.424
H5 C1 H7 110.424 H6 C1 H7 108.840
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability