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

using model chemistry: B3PW91/6-31G(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 B3PW91/6-31G(2df,p)
 hartrees
Energy at 0K-228.993003
Energy at 298.15K-228.997851
Nuclear repulsion energy122.651656
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 B3PW91/6-31G(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' 3178 3056 12.16      
2 A' 3061 2943 14.23      
3 A' 3042 2925 66.11      
4 A' 1841 1770 259.06      
5 A' 1491 1434 10.46      
6 A' 1464 1407 5.71      
7 A' 1402 1348 1.19      
8 A' 1245 1197 237.74      
9 A' 1190 1144 47.93      
10 A' 964 926 19.59      
11 A' 781 750 8.20      
12 A' 299 288 13.89      
13 A" 3144 3023 16.30      
14 A" 1478 1421 8.22      
15 A" 1177 1131 0.96      
16 A" 1047 1007 0.20      
17 A" 351 337 22.81      
18 A" 108 104 0.12      

Unscaled Zero Point Vibrational Energy (zpe) 13631.0 cm-1
Scaled (by 0.9614) Zero Point Vibrational Energy (zpe) 13104.8 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 B3PW91/6-31G(2df,p)
ABC
0.67308 0.23153 0.17806

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.352 0.407 0.000
O2 0.000 0.872 0.000
C3 -0.926 -0.090 0.000
O4 -0.714 -1.270 0.000
H5 1.975 1.301 0.000
H6 1.550 -0.199 0.888
H7 1.550 -0.199 -0.888
H8 -1.923 0.378 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.43032.33172.66081.08991.09301.09303.2754
O21.43031.33522.25812.02122.08302.08301.9854
C32.33171.33521.19913.21722.63292.63291.1015
O42.66082.25811.19913.72032.65772.65772.0443
H51.08992.02123.21723.72031.79401.79404.0059
H61.09302.08302.63292.65771.79401.77693.6311
H71.09302.08302.63292.65771.79401.77693.6311
H83.27541.98541.10152.04434.00593.63113.6311

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 114.899 O2 C1 H5 105.855
O2 C1 H6 110.574 O2 C1 H7 110.574
O2 C3 O4 125.916 O2 C3 H8 108.748
O4 C3 H8 125.336 H5 C1 H6 110.541
H5 C1 H7 110.541 H6 C1 H7 108.746
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.291      
2 O -0.213      
3 C 0.197      
4 O -0.318      
5 H 0.160      
6 H 0.166      
7 H 0.166      
8 H 0.132      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.918 1.562 0.000 1.811
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.123 -1.133 0.000
y -1.133 -27.329 0.000
z 0.000 0.000 -22.492
Traceless
 xyz
x 5.787 -1.133 0.000
y -1.133 -6.522 0.000
z 0.000 0.000 0.734
Polar
3z2-r21.468
x2-y28.206
xy-1.133
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.066 0.346 0.000
y 0.346 4.452 0.000
z 0.000 0.000 3.134


<r2> (average value of r2) Å2
<r2> 70.476
(<r2>)1/2 8.395