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

using model chemistry: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-228.974081
Energy at 298.15K-228.978948
Nuclear repulsion energy122.322537
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 B3PW91/6-31G*
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' 3201 3063 13.87      
2 A' 3085 2952 3.15      
3 A' 3079 2946 84.27      
4 A' 1850 1770 272.44      
5 A' 1520 1455 10.25      
6 A' 1486 1422 4.54      
7 A' 1415 1354 1.65      
8 A' 1260 1206 252.41      
9 A' 1200 1149 47.01      
10 A' 967 926 21.76      
11 A' 784 750 8.89      
12 A' 300 287 14.91      
13 A" 3167 3030 19.04      
14 A" 1511 1446 8.16      
15 A" 1185 1134 0.82      
16 A" 1039 994 0.31      
17 A" 354 338 26.47      
18 A" 122 117 0.07      

Unscaled Zero Point Vibrational Energy (zpe) 13763.7 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 13167.7 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 B3PW91/6-31G*
ABC
0.67051 0.22995 0.17697

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.356 0.410 0.000
O2 0.000 0.874 0.000
C3 -0.928 -0.090 0.000
O4 -0.716 -1.276 0.000
H5 1.974 1.308 0.000
H6 1.554 -0.193 0.890
H7 1.554 -0.193 -0.890
H8 -1.926 0.375 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.43342.33832.67121.09001.09331.09333.2825
O21.43341.33802.26592.02132.08502.08501.9897
C32.33831.33801.20493.22122.63922.63921.1009
O42.67122.26591.20493.72992.66812.66812.0467
H51.09002.02133.22123.72991.79481.79484.0103
H61.09332.08502.63922.66811.79481.78013.6371
H71.09332.08502.63922.66811.79481.78013.6371
H83.28251.98971.10092.04674.01033.63713.6371

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 115.025 O2 C1 H5 105.644
O2 C1 H6 110.493 O2 C1 H7 110.493
O2 C3 O4 125.944 O2 C3 H8 108.957
O4 C3 H8 125.099 H5 C1 H6 110.591
H5 C1 H7 110.591 H6 C1 H7 109.005
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.292     -0.052
2 O -0.404     -0.343
3 C 0.373     0.600
4 O -0.423     -0.481
5 H 0.192     0.094
6 H 0.196     0.094
7 H 0.196     0.094
8 H 0.162     -0.007


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.978 1.565 0.000 1.845
CHELPG        
AIM        
ESP 1.017 1.556 0.000 1.859


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.945 -1.123 0.000
y -1.123 -27.698 0.000
z 0.000 0.000 -22.611
Traceless
 xyz
x 6.210 -1.123 0.000
y -1.123 -6.921 0.000
z 0.000 0.000 0.711
Polar
3z2-r21.421
x2-y28.754
xy-1.123
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> 70.861
(<r2>)1/2 8.418