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

using model chemistry: HF/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/CEP-31G
 hartrees
Energy at 0K-44.579575
Energy at 298.15K-44.584498
Nuclear repulsion energy67.749099
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 HF/CEP-31G
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' 3404 3068 41.81      
2 A' 3388 3054 49.79      
3 A' 3262 2940 43.73      
4 A' 1818 1639 400.37      
5 A' 1634 1473 12.47      
6 A' 1599 1442 8.14      
7 A' 1495 1348 10.95      
8 A' 1336 1204 327.91      
9 A' 1288 1161 137.21      
10 A' 962 867 36.64      
11 A' 797 719 15.39      
12 A' 293 264 22.86      
13 A" 3365 3034 57.18      
14 A" 1629 1469 11.87      
15 A" 1276 1150 4.11      
16 A" 1137 1025 1.08      
17 A" 333 301 66.14      
18 A" 140 127 0.34      

Unscaled Zero Point Vibrational Energy (zpe) 14578.0 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 13140.6 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 HF/CEP-31G
ABC
0.68031 0.21596 0.16915

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.392 0.408 0.000
O2 0.000 0.843 0.000
C3 -0.985 -0.078 0.000
O4 -0.805 -1.287 0.000
H5 1.972 1.319 0.000
H6 1.593 -0.183 0.888
H7 1.593 -0.183 -0.888
H8 -1.958 0.394 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.45892.42612.77501.08041.08471.08473.3500
O21.45891.34882.27792.02842.09252.09252.0086
C32.42611.34881.22243.27022.72832.72831.0817
O42.77502.27791.22243.80862.78542.78542.0389
H51.08042.02843.27023.80861.78541.78544.0369
H61.08472.09252.72832.78541.78541.77523.7052
H71.08472.09252.72832.78541.78541.77523.7052
H83.35002.00861.08172.03894.03693.70523.7052

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 119.508 O2 C1 H5 105.057
O2 C1 H6 109.833 O2 C1 H7 109.833
O2 C3 O4 124.652 O2 C3 H8 110.985
O4 C3 H8 124.363 H5 C1 H6 111.099
H5 C1 H7 111.099 H6 C1 H7 109.822
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.205      
2 O -0.320      
3 C 0.080      
4 O -0.273      
5 H 0.186      
6 H 0.168      
7 H 0.168      
8 H 0.195      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.110 1.954 0.000 2.248
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.894 -2.056 0.000
y -2.056 -31.210 0.000
z 0.000 0.000 -23.069
Traceless
 xyz
x 9.246 -2.056 0.000
y -2.056 -10.728 0.000
z 0.000 0.000 1.483
Polar
3z2-r22.965
x2-y213.316
xy-2.056
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.879 0.299 0.000
y 0.299 4.041 0.000
z 0.000 0.000 2.535


<r2> (average value of r2) Å2
<r2> 61.783
(<r2>)1/2 7.860