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

using model chemistry: B3LYP/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/3-21G*
 hartrees
Energy at 0K-227.795193
Energy at 298.15K-227.799883
Nuclear repulsion energy120.120553
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 B3LYP/3-21G*
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' 3190 3069 11.27      
2 A' 3076 2959 2.33      
3 A' 3072 2955 72.00      
4 A' 1739 1673 179.33      
5 A' 1562 1502 10.24      
6 A' 1486 1429 6.40      
7 A' 1401 1348 2.25      
8 A' 1188 1143 83.38      
9 A' 1151 1107 184.23      
10 A' 894 860 10.38      
11 A' 756 727 9.54      
12 A' 285 274 16.32      
13 A" 3141 3021 20.74      
14 A" 1547 1488 10.23      
15 A" 1162 1118 0.24      
16 A" 1044 1005 0.12      
17 A" 338 325 31.62      
18 A" 60 58 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 13544.5 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 13029.8 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 B3LYP/3-21G*
ABC
0.63777 0.22281 0.17044

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.395 0.397 0.000
O2 0.000 0.895 0.000
C3 -0.959 -0.086 0.000
O4 -0.732 -1.287 0.000
H5 2.009 1.295 0.000
H6 1.584 -0.210 0.889
H7 1.584 -0.210 -0.889
H8 -1.940 0.398 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.48182.40332.71291.08801.09261.09263.3360
O21.48181.37182.30142.04872.12582.12582.0032
C32.40331.37181.22203.27372.69622.69621.0944
O42.71292.30141.22203.76562.70392.70392.0732
H51.08802.04873.27373.76561.79901.79904.0504
H61.09262.12582.69622.70391.79901.77813.6849
H71.09262.12582.69622.70391.79901.77813.6849
H83.33602.00321.09442.07324.05043.68493.6849

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 114.685 O2 C1 H5 104.689
O2 C1 H6 110.418 O2 C1 H7 110.418
O2 C3 O4 124.955 O2 C3 H8 108.109
O4 C3 H8 126.936 H5 C1 H6 111.177
H5 C1 H7 111.177 H6 C1 H7 108.924
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.350      
2 O -0.485      
3 C 0.438      
4 O -0.459      
5 H 0.217      
6 H 0.218      
7 H 0.218      
8 H 0.202      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.026 1.248 0.000 1.615
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.592 -1.095 0.000
y -1.095 -28.258 0.000
z 0.000 0.000 -22.751
Traceless
 xyz
x 6.912 -1.095 0.000
y -1.095 -7.586 0.000
z 0.000 0.000 0.674
Polar
3z2-r21.348
x2-y29.665
xy-1.095
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.507 0.340 0.000
y 0.340 3.928 0.000
z 0.000 0.000 2.336


<r2> (average value of r2) Å2
<r2> 72.943
(<r2>)1/2 8.541