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

using model chemistry: B3PW91/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-311G*
 hartrees
Energy at 0K-229.032792
Energy at 298.15K-229.037664
Nuclear repulsion energy122.553551
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 B3PW91/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3182 3064 16.71      
2 A' 3066 2952 12.42      
3 A' 3053 2939 82.14      
4 A' 1834 1766 302.52      
5 A' 1512 1456 11.75      
6 A' 1479 1424 5.92      
7 A' 1408 1355 1.34      
8 A' 1248 1201 221.05      
9 A' 1195 1150 89.99      
10 A' 957 921 24.70      
11 A' 787 758 8.43      
12 A' 300 289 14.45      
13 A" 3144 3027 24.17      
14 A" 1500 1444 10.82      
15 A" 1185 1141 0.71      
16 A" 1036 997 0.08      
17 A" 352 338 27.57      
18 A" 121 117 0.08      

Unscaled Zero Point Vibrational Energy (zpe) 13679.2 cm-1
Scaled (by 0.9627) Zero Point Vibrational Energy (zpe) 13169.0 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 B3PW91/6-311G*
ABC
0.67644 0.22984 0.17729

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.358 0.412 0.000
O2 0.000 0.869 0.000
C3 -0.927 -0.092 0.000
O4 -0.718 -1.272 0.000
H5 1.969 1.311 0.000
H6 1.559 -0.189 0.888
H7 1.559 -0.189 -0.888
H8 -1.924 0.373 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.43252.33962.67331.08761.09121.09123.2815
O21.43251.33552.25862.01832.08282.08281.9865
C32.33961.33551.19833.21852.64152.64151.1000
O42.67332.25861.19833.72802.67372.67372.0398
H51.08762.01833.21853.72801.79111.79114.0044
H61.09122.08282.64152.67371.79111.77703.6376
H71.09122.08282.64152.67371.79111.77703.6376
H83.28151.98651.10002.03984.00443.63763.6376

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 115.351 O2 C1 H5 105.614
O2 C1 H6 110.508 O2 C1 H7 110.508
O2 C3 O4 126.014 O2 C3 H8 108.915
O4 C3 H8 125.071 H5 C1 H6 110.581
H5 C1 H7 110.581 H6 C1 H7 109.024
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.483      
2 O -0.275      
3 C 0.187      
4 O -0.336      
5 H 0.233      
6 H 0.238      
7 H 0.238      
8 H 0.197      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.975 1.582 0.000 1.858
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.087 -1.145 0.000
y -1.145 -28.080 0.000
z 0.000 0.000 -22.815
Traceless
 xyz
x 6.360 -1.145 0.000
y -1.145 -7.129 0.000
z 0.000 0.000 0.769
Polar
3z2-r21.537
x2-y28.993
xy-1.145
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> 70.921
(<r2>)1/2 8.421