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

using model chemistry: mPW1PW91/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/3-21G
 hartrees
Energy at 0K-227.731886
Energy at 298.15K-227.736658
Nuclear repulsion energy120.726527
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 mPW1PW91/3-21G
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' 3220 3073 8.98      
2 A' 3113 2972 46.32      
3 A' 3096 2955 21.28      
4 A' 1768 1688 188.27      
5 A' 1566 1495 11.64      
6 A' 1494 1426 8.20      
7 A' 1409 1345 2.53      
8 A' 1210 1155 178.53      
9 A' 1175 1122 89.15      
10 A' 925 883 11.36      
11 A' 767 732 10.47      
12 A' 289 276 17.73      
13 A" 3171 3027 17.29      
14 A" 1552 1481 12.58      
15 A" 1174 1121 0.12      
16 A" 1059 1011 0.18      
17 A" 344 328 34.79      
18 A" 82 79 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 13706.0 cm-1
Scaled (by 0.9546) Zero Point Vibrational Energy (zpe) 13083.7 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 mPW1PW91/3-21G
ABC
0.64194 0.22602 0.17260

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.384 0.393 0.000
O2 0.000 0.892 0.000
C3 -0.953 -0.083 0.000
O4 -0.724 -1.281 0.000
H5 2.002 1.287 0.000
H6 1.570 -0.214 0.888
H7 1.570 -0.214 -0.888
H8 -1.936 0.394 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.47102.38532.69161.08721.09181.09183.3195
O21.47101.36352.28982.04092.11572.11571.9985
C32.38531.36351.21933.25782.67812.67811.0922
O42.69162.28981.21933.74522.68082.68082.0674
H51.08722.04093.25783.74521.79731.79734.0378
H61.09182.11572.67812.68081.79731.77573.6671
H71.09182.11572.67812.68081.79731.77573.6671
H83.31951.99851.09222.06744.03783.66713.6671

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 114.551 O2 C1 H5 104.848
O2 C1 H6 110.418 O2 C1 H7 110.418
O2 C3 O4 124.791 O2 C3 H8 108.432
O4 C3 H8 126.776 H5 C1 H6 111.152
H5 C1 H7 111.152 H6 C1 H7 108.824
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.412      
2 O -0.505      
3 C 0.438      
4 O -0.474      
5 H 0.241      
6 H 0.241      
7 H 0.241      
8 H 0.230      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.006 1.285 0.000 1.632
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.368 -1.143 0.000
y -1.143 -28.337 0.000
z 0.000 0.000 -22.731
Traceless
 xyz
x 7.166 -1.143 0.000
y -1.143 -7.787 0.000
z 0.000 0.000 0.621
Polar
3z2-r21.243
x2-y29.969
xy-1.143
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> 72.209
(<r2>)1/2 8.498