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

using model chemistry: HF/6-31G*

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/6-31G*
 hartrees
Energy at 0K-227.789420
Energy at 298.15K 
HF Energy-227.789420
Nuclear repulsion energy123.802102
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/6-31G*
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' 3356 3015 26.00      
2 A' 3304 2968 63.01      
3 A' 3253 2923 32.32      
4 A' 2012 1808 389.92      
5 A' 1649 1481 8.67      
6 A' 1628 1463 2.41      
7 A' 1550 1392 6.29      
8 A' 1393 1252 399.12      
9 A' 1324 1189 68.78      
10 A' 1039 934 33.54      
11 A' 851 764 12.23      
12 A' 326 293 18.37      
13 A" 3335 2996 30.95      
14 A" 1644 1477 4.73      
15 A" 1299 1167 3.76      
16 A" 1186 1066 5.80      
17 A" 348 313 39.31      
18 A" 167 150 0.11      

Unscaled Zero Point Vibrational Energy (zpe) 14831.1 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 13325.8 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 HF/6-31G*
ABC
0.70081 0.23189 0.18007

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.353 0.419 0.000
O2 0.000 0.847 0.000
C3 -0.921 -0.093 0.000
O4 -0.719 -1.259 0.000
H5 1.947 1.319 0.000
H6 1.562 -0.170 0.882
H7 1.562 -0.170 -0.882
H8 -1.910 0.354 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.41922.33122.66601.07821.08041.08043.2631
O21.41921.31652.22562.00312.06172.06171.9722
C32.33121.31651.18353.19682.63612.63611.0846
O42.66602.22561.18353.70822.67672.67672.0050
H51.07822.00313.19683.70821.77231.77233.9752
H61.08042.06172.63612.67671.77231.76313.6196
H71.08042.06172.63612.67671.77231.76313.6196
H83.26311.97221.08462.00503.97523.61963.6196

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 116.848 O2 C1 H5 105.852
O2 C1 H6 110.412 O2 C1 H7 110.412
O2 C3 O4 125.725 O2 C3 H8 110.077
O4 C3 H8 124.198 H5 C1 H6 110.380
H5 C1 H7 110.380 H6 C1 H7 109.365
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.192      
2 O -0.569      
3 C 0.542      
4 O -0.524      
5 H 0.188      
6 H 0.187      
7 H 0.187      
8 H 0.181      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.877 1.783 0.000 1.987
CHELPG 0.908 1.778 0.000 1.997
AIM        
ESP 0.909 1.772 0.000 1.992


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.653 -1.385 0.000
y -1.385 -28.725 0.000
z 0.000 0.000 -22.724
Traceless
 xyz
x 7.071 -1.385 0.000
y -1.385 -8.036 0.000
z 0.000 0.000 0.965
Polar
3z2-r21.930
x2-y210.072
xy-1.385
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.110 0.249 0.000
y 0.249 4.029 0.000
z 0.000 0.000 2.665


<r2> (average value of r2) Å2
<r2> 70.121
(<r2>)1/2 8.374