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

using model chemistry: mPW1PW91/6-31+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 mPW1PW91/6-31+G**
 hartrees
Energy at 0K-229.015081
Energy at 298.15K-229.019962
Nuclear repulsion energy122.474572
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 mPW1PW91/6-31+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' 3216 3061 9.84      
2 A' 3108 2959 39.62      
3 A' 3093 2943 32.02      
4 A' 1837 1749 347.07      
5 A' 1505 1433 12.59      
6 A' 1478 1407 6.42      
7 A' 1406 1338 1.11      
8 A' 1269 1208 280.61      
9 A' 1199 1141 38.89      
10 A' 969 922 26.86      
11 A' 783 746 8.46      
12 A' 298 284 15.53      
13 A" 3180 3027 14.80      
14 A" 1495 1423 11.22      
15 A" 1183 1126 1.02      
16 A" 1047 997 0.00      
17 A" 353 336 30.45      
18 A" 124 118 0.11      

Unscaled Zero Point Vibrational Energy (zpe) 13771.6 cm-1
Scaled (by 0.9518) Zero Point Vibrational Energy (zpe) 13107.8 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 mPW1PW91/6-31+G**
ABC
0.67457 0.22991 0.17721

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.357 0.413 0.000
O2 0.000 0.868 0.000
C3 -0.929 -0.089 0.000
O4 -0.716 -1.275 0.000
H5 1.968 1.313 0.000
H6 1.556 -0.188 0.889
H7 1.556 -0.188 -0.889
H8 -1.926 0.370 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.43182.34092.67321.08771.09111.09113.2839
O21.43181.33392.25922.01792.08032.08031.9896
C32.34091.33391.20463.21862.64152.64151.0977
O42.67322.25921.20463.72812.67122.67122.0419
H51.08772.01793.21863.72811.79191.79194.0070
H61.09112.08032.64152.67121.79191.77813.6373
H71.09112.08032.64152.67121.79191.77813.6373
H83.28391.98961.09772.04194.00703.63733.6373

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 115.600 O2 C1 H5 105.624
O2 C1 H6 110.359 O2 C1 H7 110.359
O2 C3 O4 125.662 O2 C3 H8 109.432
O4 C3 H8 124.906 H5 C1 H6 110.663
H5 C1 H7 110.663 H6 C1 H7 109.140
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.288      
2 O -0.251      
3 C 0.288      
4 O -0.441      
5 H 0.177      
6 H 0.185      
7 H 0.185      
8 H 0.145      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.009 1.705 0.000 1.981
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.160 -1.251 0.000
y -1.251 -28.868 0.000
z 0.000 0.000 -23.118
Traceless
 xyz
x 6.833 -1.251 0.000
y -1.251 -7.730 0.000
z 0.000 0.000 0.896
Polar
3z2-r21.793
x2-y29.709
xy-1.251
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> 71.183
(<r2>)1/2 8.437