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

using model chemistry: B3LYP/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 B3LYP/6-31G(2df,p)
 hartrees
Energy at 0K-229.082027
Energy at 298.15K-229.086868
Nuclear repulsion energy122.308551
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/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' 3165 3054 13.48      
2 A' 3055 2948 15.36      
3 A' 3034 2928 64.93      
4 A' 1826 1762 255.41      
5 A' 1496 1444 9.62      
6 A' 1469 1418 3.77      
7 A' 1405 1356 1.35      
8 A' 1234 1191 204.93      
9 A' 1187 1146 90.46      
10 A' 944 911 19.52      
11 A' 777 750 7.81      
12 A' 299 289 13.45      
13 A" 3131 3021 17.91      
14 A" 1483 1431 6.99      
15 A" 1179 1138 1.28      
16 A" 1047 1010 0.33      
17 A" 347 334 22.65      
18 A" 110 106 0.12      

Unscaled Zero Point Vibrational Energy (zpe) 13593.2 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 13117.5 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/6-31G(2df,p)
ABC
0.67236 0.22922 0.17664

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.361 0.410 0.000
O2 0.000 0.872 0.000
C3 -0.930 -0.092 0.000
O4 -0.720 -1.273 0.000
H5 1.978 1.308 0.000
H6 1.560 -0.193 0.889
H7 1.560 -0.193 -0.889
H8 -1.925 0.379 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.43682.34492.67651.08951.09271.09273.2859
O21.43681.33912.26282.02522.08772.08771.9872
C32.34491.33911.20013.22702.64572.64571.1008
O42.67652.26281.20013.73392.67482.67482.0449
H51.08952.02523.22703.73391.79431.79434.0119
H61.09272.08772.64572.67481.79431.77723.6419
H71.09272.08772.64572.67481.79431.77723.6419
H83.28591.98721.10082.04494.01193.64193.6419

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 115.240 O2 C1 H5 105.753
O2 C1 H6 110.510 O2 C1 H7 110.510
O2 C3 O4 125.949 O2 C3 H8 108.675
O4 C3 H8 125.375 H5 C1 H6 110.615
H5 C1 H7 110.615 H6 C1 H7 108.823
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.236      
2 O -0.190      
3 C 0.188      
4 O -0.302      
5 H 0.138      
6 H 0.145      
7 H 0.145      
8 H 0.111      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.929 1.552 0.000 1.809
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.300 -1.119 0.000
y -1.119 -27.489 0.000
z 0.000 0.000 -22.572
Traceless
 xyz
x 5.730 -1.119 0.000
y -1.119 -6.553 0.000
z 0.000 0.000 0.823
Polar
3z2-r21.646
x2-y28.189
xy-1.119
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.089 0.350 0.000
y 0.350 4.450 0.000
z 0.000 0.000 3.115


<r2> (average value of r2) Å2
<r2> 70.991
(<r2>)1/2 8.426