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

using model chemistry: BLYP/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 BLYP/6-31G(2df,p)
 hartrees
Energy at 0K-229.020266
Energy at 298.15K-229.024997
Nuclear repulsion energy120.928254
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 BLYP/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' 3088 3071 14.27      
2 A' 2980 2964 18.81      
3 A' 2939 2923 67.89      
4 A' 1746 1736 221.25      
5 A' 1455 1447 8.49      
6 A' 1423 1415 2.59      
7 A' 1360 1353 1.04      
8 A' 1173 1167 67.45      
9 A' 1123 1117 188.39      
10 A' 885 880 16.36      
11 A' 745 741 6.49      
12 A' 287 285 11.86      
13 A" 3051 3034 19.54      
14 A" 1442 1434 6.00      
15 A" 1138 1132 1.10      
16 A" 992 987 0.03      
17 A" 342 340 19.58      
18 A" 94 93 0.13      

Unscaled Zero Point Vibrational Energy (zpe) 13131.1 cm-1
Scaled (by 0.9945) Zero Point Vibrational Energy (zpe) 13058.9 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 BLYP/6-31G(2df,p)
ABC
0.65632 0.22399 0.17251

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.377 0.413 0.000
O2 0.000 0.886 0.000
C3 -0.940 -0.095 0.000
O4 -0.729 -1.289 0.000
H5 1.996 1.318 0.000
H6 1.575 -0.195 0.895
H7 1.575 -0.195 -0.895
H8 -1.937 0.388 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.45622.37202.70821.09621.09951.09953.3148
O21.45621.35832.29372.04202.10902.10902.0004
C32.37201.35831.21223.25782.67062.67061.1085
O42.70822.29371.21223.77122.70292.70292.0666
H51.09622.04203.25783.77121.80741.80744.0416
H61.09952.10902.67062.70291.80741.78943.6708
H71.09952.10902.67062.70291.80741.78943.6708
H83.31482.00041.10852.06664.04163.67083.6708

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 114.827 O2 C1 H5 105.397
O2 C1 H6 110.444 O2 C1 H7 110.444
O2 C3 O4 126.237 O2 C3 H8 107.949
O4 C3 H8 125.814 H5 C1 H6 110.805
H5 C1 H7 110.805 H6 C1 H7 108.922
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.221      
2 O -0.140      
3 C 0.150      
4 O -0.268      
5 H 0.123      
6 H 0.133      
7 H 0.133      
8 H 0.092      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.977 1.480 0.000 1.773
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.581 -1.041 0.000
y -1.041 -27.408 0.000
z 0.000 0.000 -22.689
Traceless
 xyz
x 5.468 -1.041 0.000
y -1.041 -6.274 0.000
z 0.000 0.000 0.806
Polar
3z2-r21.612
x2-y27.827
xy-1.041
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.406 0.395 0.000
y 0.395 4.605 0.000
z 0.000 0.000 3.177


<r2> (average value of r2) Å2
<r2> 72.345
(<r2>)1/2 8.506