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

using model chemistry: B3PW91/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/3-21G
 hartrees
Energy at 0K-227.708463
Energy at 298.15K-227.713203
Nuclear repulsion energy120.385611
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 B3PW91/3-21G
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' 3200 3076 9.74      
2 A' 3086 2967 41.24      
3 A' 3077 2958 30.39      
4 A' 1750 1682 182.58      
5 A' 1557 1496 11.27      
6 A' 1484 1426 7.88      
7 A' 1399 1345 2.46      
8 A' 1195 1148 136.69      
9 A' 1162 1117 123.18      
10 A' 911 876 10.52      
11 A' 759 730 10.01      
12 A' 286 274 17.18      
13 A" 3151 3029 18.43      
14 A" 1543 1483 12.14      
15 A" 1164 1119 0.09      
16 A" 1048 1007 0.30      
17 A" 342 329 33.41      
18 A" 76 73 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 13594.5 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 13067.0 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 B3PW91/3-21G
ABC
0.63928 0.22437 0.17147

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.389 0.395 0.000
O2 0.000 0.894 0.000
C3 -0.955 -0.085 0.000
O4 -0.728 -1.285 0.000
H5 2.006 1.292 0.000
H6 1.576 -0.212 0.889
H7 1.576 -0.212 -0.889
H8 -1.938 0.397 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.47562.39252.70231.08891.09341.09343.3267
O21.47561.36792.29782.04502.12132.12132.0009
C32.39251.36791.22173.26572.68602.68601.0945
O42.70232.29781.22173.75702.69232.69232.0722
H51.08892.04503.26573.75701.80001.80004.0443
H61.09342.12132.68602.69231.80001.77883.6757
H71.09342.12132.68602.69231.80001.77883.6757
H83.32672.00091.09452.07224.04433.67573.6757

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 114.521 O2 C1 H5 104.766
O2 C1 H6 110.444 O2 C1 H7 110.444
O2 C3 O4 124.974 O2 C3 H8 108.185
O4 C3 H8 126.840 H5 C1 H6 111.142
H5 C1 H7 111.142 H6 C1 H7 108.870
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.409      
2 O -0.491      
3 C 0.425      
4 O -0.466      
5 H 0.239      
6 H 0.239      
7 H 0.239      
8 H 0.225      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.029 1.277 0.000 1.640
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.423 -1.126 0.000
y -1.126 -28.268 0.000
z 0.000 0.000 -22.736
Traceless
 xyz
x 7.080 -1.126 0.000
y -1.126 -7.689 0.000
z 0.000 0.000 0.609
Polar
3z2-r21.219
x2-y29.846
xy-1.126
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> 72.574
(<r2>)1/2 8.519