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

using model chemistry: HF/STO-3G

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/STO-3G
 hartrees
Energy at 0K-224.799383
Energy at 298.15K-224.804188
Nuclear repulsion energy121.114615
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/STO-3G
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' 3732 3047 0.16      
2 A' 3583 2925 7.42      
3 A' 3535 2886 2.90      
4 A' 2102 1717 117.60      
5 A' 1805 1474 6.49      
6 A' 1743 1423 10.24      
7 A' 1581 1291 30.55      
8 A' 1436 1173 117.76      
9 A' 1363 1113 3.73      
10 A' 1113 909 29.92      
11 A' 806 658 12.51      
12 A' 335 274 9.46      
13 A" 3704 3025 2.10      
14 A" 1791 1462 3.01      
15 A" 1318 1076 4.59      
16 A" 1080 881 1.09      
17 A" 291 238 19.41      
18 A" 162 132 0.17      

Unscaled Zero Point Vibrational Energy (zpe) 15740.1 cm-1
Scaled (by 0.8165) Zero Point Vibrational Energy (zpe) 12851.8 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/STO-3G
ABC
0.64096 0.23018 0.17493

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.344 0.402 0.000
O2 0.000 0.914 0.000
C3 -0.947 -0.102 0.000
O4 -0.690 -1.288 0.000
H5 2.011 1.265 0.000
H6 1.544 -0.206 0.887
H7 1.544 -0.206 -0.887
H8 -1.959 0.339 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.43802.34492.64411.09101.09361.09363.3028
O21.43801.38842.30752.04112.10382.10382.0412
C32.34491.38841.21353.25782.64622.64621.1039
O42.64412.30751.21353.71652.63652.63652.0630
H51.09102.04113.25783.71651.77971.77974.0758
H61.09362.10382.64622.63651.77971.77373.6544
H71.09362.10382.64622.63651.77971.77373.6544
H83.30282.04121.10392.06304.07583.65443.6544

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 112.113 O2 C1 H5 106.818
O2 C1 H6 111.685 O2 C1 H7 111.685
O2 C3 O4 124.824 O2 C3 H8 109.434
O4 C3 H8 125.742 H5 C1 H6 109.110
H5 C1 H7 109.110 H6 C1 H7 108.376
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.064      
2 O -0.245      
3 C 0.257      
4 O -0.247      
5 H 0.079      
6 H 0.074      
7 H 0.074      
8 H 0.072      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.403 0.721 0.000 0.826
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.632 -0.732 0.000
y -0.732 -25.899 0.000
z 0.000 0.000 -20.928
Traceless
 xyz
x 4.782 -0.732 0.000
y -0.732 -6.119 0.000
z 0.000 0.000 1.337
Polar
3z2-r22.674
x2-y27.268
xy-0.732
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.671 0.214 0.000
y 0.214 2.481 0.000
z 0.000 0.000 1.170


<r2> (average value of r2) Å2
<r2> 70.653
(<r2>)1/2 8.406