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

using model chemistry: B1B95/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/6-31G
 hartrees
Energy at 0K-228.893258
Energy at 298.15K-228.897893
Nuclear repulsion energy120.556773
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 B1B95/6-31G
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' 3240 3090 8.61      
2 A' 3158 3012 39.05      
3 A' 3096 2952 17.09      
4 A' 1738 1658 238.36      
5 A' 1532 1461 11.16      
6 A' 1484 1415 7.87      
7 A' 1401 1336 6.17      
8 A' 1221 1165 182.67      
9 A' 1177 1122 104.76      
10 A' 910 868 15.68      
11 A' 759 724 10.55      
12 A' 282 269 17.11      
13 A" 3188 3040 17.52      
14 A" 1520 1450 13.37      
15 A" 1170 1116 0.72      
16 A" 1029 981 0.07      
17 A" 347 331 38.92      
18 A" 24 23 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 13637.4 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 13006.0 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 B1B95/6-31G
ABC
0.65461 0.22172 0.17097

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.390 0.421 0.000
O2 0.000 0.879 0.000
C3 -0.953 -0.090 0.000
O4 -0.729 -1.295 0.000
H5 1.986 1.328 0.000
H6 1.585 -0.180 0.889
H7 1.585 -0.180 -0.889
H8 -1.942 0.372 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.46342.39812.72611.08551.09051.09053.3317
O21.46341.35922.29272.03592.10352.10352.0068
C32.39811.35921.22573.26322.69152.69151.0905
O42.72612.29271.22573.77462.71852.71852.0608
H51.08552.03593.26323.77461.79541.79544.0421
H61.09052.10352.69152.71851.79541.77823.6789
H71.09052.10352.69152.71851.79541.77823.6789
H83.33172.00681.09052.06084.04213.67893.6789

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 116.294 O2 C1 H5 105.051
O2 C1 H6 110.046 O2 C1 H7 110.046
O2 C3 O4 124.904 O2 C3 H8 109.523
O4 C3 H8 125.573 H5 C1 H6 111.200
H5 C1 H7 111.200 H6 C1 H7 109.239
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.234      
2 O -0.479      
3 C 0.363      
4 O -0.407      
5 H 0.191      
6 H 0.193      
7 H 0.193      
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
  1.118 1.493 0.000 1.865
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.332 -1.158 0.000
y -1.158 -29.209 0.000
z 0.000 0.000 -22.868
Traceless
 xyz
x 7.707 -1.158 0.000
y -1.158 -8.609 0.000
z 0.000 0.000 0.902
Polar
3z2-r21.804
x2-y210.877
xy-1.158
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.620 0.389 0.000
y 0.389 4.361 0.000
z 0.000 0.000 2.565


<r2> (average value of r2) Å2
<r2> 72.941
(<r2>)1/2 8.541