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

using model chemistry: PBE1PBE/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 PBE1PBE/6-31G*
 hartrees
Energy at 0K-228.807499
Energy at 298.15K-228.812400
HF Energy-228.807499
Nuclear repulsion energy122.672402
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 PBE1PBE/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' 3217 3057 12.58      
2 A' 3100 2946 16.29      
3 A' 3096 2942 66.49      
4 A' 1869 1776 277.71      
5 A' 1524 1448 10.91      
6 A' 1491 1417 5.38      
7 A' 1419 1348 1.66      
8 A' 1278 1215 269.41      
9 A' 1208 1148 31.99      
10 A' 986 937 22.44      
11 A' 791 752 9.19      
12 A' 306 290 15.24      
13 A" 3181 3023 17.39      
14 A" 1514 1439 8.63      
15 A" 1191 1132 0.82      
16 A" 1048 996 0.41      
17 A" 357 339 26.74      
18 A" 130 124 0.07      

Unscaled Zero Point Vibrational Energy (zpe) 13852.9 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 13164.4 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 PBE1PBE/6-31G*
ABC
0.67148 0.23220 0.17835

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.349 0.406 0.000
O2 0.000 0.873 0.000
C3 -0.925 -0.088 0.000
O4 -0.711 -1.271 0.000
H5 1.972 1.300 0.000
H6 1.545 -0.199 0.889
H7 1.545 -0.199 -0.889
H8 -1.924 0.374 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.42832.32742.65621.08971.09311.09313.2737
O21.42831.33402.25942.01782.08082.08081.9879
C32.32741.33401.20293.21252.62812.62811.1005
O42.65622.25941.20293.71592.65142.65142.0442
H51.08972.01783.21253.71591.79441.79444.0049
H61.09312.08082.62812.65141.79441.77863.6272
H71.09312.08082.62812.65141.79441.77863.6272
H83.27371.98791.10052.04424.00493.62723.6272

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 114.778 O2 C1 H5 105.735
O2 C1 H6 110.527 O2 C1 H7 110.527
O2 C3 O4 125.823 O2 C3 H8 109.109
O4 C3 H8 125.067 H5 C1 H6 110.576
H5 C1 H7 110.576 H6 C1 H7 108.883
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.301      
2 O -0.408      
3 C 0.374      
4 O -0.424      
5 H 0.196      
6 H 0.199      
7 H 0.199      
8 H 0.165      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.947 1.563 0.000 1.827
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.001 -1.134 0.000
y -1.134 -27.734 0.000
z 0.000 0.000 -22.662
Traceless
 xyz
x 6.196 -1.134 0.000
y -1.134 -6.902 0.000
z 0.000 0.000 0.706
Polar
3z2-r21.412
x2-y28.733
xy-1.134
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.657 0.328 0.000
y 0.328 4.282 0.000
z 0.000 0.000 2.790


<r2> (average value of r2) Å2
<r2> 70.473
(<r2>)1/2 8.395