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

using model chemistry: BLYP/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-229.022336
Energy at 298.15K-229.027073
Nuclear repulsion energy120.263104
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/6-31+G**
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' 3104 3087 11.91      
2 A' 2992 2976 15.52      
3 A' 2980 2965 63.00      
4 A' 1712 1703 306.30      
5 A' 1459 1451 9.02      
6 A' 1422 1414 3.53      
7 A' 1350 1343 1.29      
8 A' 1172 1166 85.50      
9 A' 1118 1112 200.01      
10 A' 868 863 22.95      
11 A' 738 734 6.69      
12 A' 282 281 13.27      
13 A" 3069 3052 17.81      
14 A" 1449 1441 9.16      
15 A" 1131 1125 0.96      
16 A" 977 972 0.22      
17 A" 341 339 26.98      
18 A" 111 110 0.10      

Unscaled Zero Point Vibrational Energy (zpe) 13136.1 cm-1
Scaled (by 0.9947) Zero Point Vibrational Energy (zpe) 13066.5 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/6-31+G**
ABC
0.65432 0.21999 0.17004

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.391 0.423 0.000
O2 0.000 0.884 0.000
C3 -0.947 -0.095 0.000
O4 -0.737 -1.299 0.000
H5 1.993 1.339 0.000
H6 1.590 -0.180 0.898
H7 1.590 -0.180 -0.898
H8 -1.947 0.379 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.46562.39452.73751.09601.09941.09943.3383
O21.46561.36192.30402.04452.11292.11292.0113
C32.39451.36191.22193.27092.69192.69191.1070
O42.73752.30401.22193.79632.73372.73372.0687
H51.09602.04453.27093.79631.80941.80944.0554
H61.09942.11292.69192.73371.80941.79593.6913
H71.09942.11292.69192.73371.80941.79593.6913
H83.33832.01131.10702.06874.05543.69133.6913

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 115.694 O2 C1 H5 104.986
O2 C1 H6 110.110 O2 C1 H7 110.110
O2 C3 O4 126.090 O2 C3 H8 108.666
O4 C3 H8 125.244 H5 C1 H6 111.017
H5 C1 H7 111.017 H6 C1 H7 109.529
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.230      
2 O -0.248      
3 C 0.293      
4 O -0.422      
5 H 0.154      
6 H 0.167      
7 H 0.167      
8 H 0.120      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.118 1.640 0.000 1.985
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.677 -1.177 0.000
y -1.177 -29.344 0.000
z 0.000 0.000 -23.577
Traceless
 xyz
x 6.784 -1.177 0.000
y -1.177 -7.716 0.000
z 0.000 0.000 0.933
Polar
3z2-r21.865
x2-y29.667
xy-1.177
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 73.757
(<r2>)1/2 8.588