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

using model chemistry: B3PW91/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-229.062671
Energy at 298.15K-229.067532
Nuclear repulsion energy122.629451
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/cc-pVTZ
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' 3168 3046 11.54      
2 A' 3057 2940 15.07      
3 A' 3038 2921 63.63      
4 A' 1819 1749 292.95      
5 A' 1492 1435 10.69      
6 A' 1463 1407 5.88      
7 A' 1395 1341 1.17      
8 A' 1239 1192 237.91      
9 A' 1186 1140 67.01      
10 A' 953 916 22.64      
11 A' 780 750 8.22      
12 A' 298 287 13.99      
13 A" 3133 3013 16.78      
14 A" 1479 1422 9.98      
15 A" 1173 1128 0.98      
16 A" 1043 1003 0.00      
17 A" 347 334 24.83      
18 A" 115 111 0.16      

Unscaled Zero Point Vibrational Energy (zpe) 13588.6 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 13066.8 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 B3PW91/cc-pVTZ
ABC
0.67675 0.23024 0.17753

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.357 0.411 0.000
O2 0.000 0.869 0.000
C3 -0.927 -0.091 0.000
O4 -0.718 -1.271 0.000
H5 1.972 1.307 0.000
H6 1.557 -0.190 0.887
H7 1.557 -0.190 -0.887
H8 -1.923 0.373 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.43232.33862.67101.08641.08971.08973.2805
O21.43231.33422.25672.01972.08132.08131.9860
C32.33861.33421.19813.21802.63932.63931.0987
O42.67102.25671.19813.72532.67012.67012.0378
H51.08642.01973.21803.72531.78871.78874.0051
H61.08972.08132.63932.67011.78871.77363.6351
H71.08972.08132.63932.67011.78871.77363.6351
H83.28051.98601.09872.03784.00513.63513.6351

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 115.365 O2 C1 H5 105.796
O2 C1 H6 110.488 O2 C1 H7 110.488
O2 C3 O4 125.952 O2 C3 H8 109.051
O4 C3 H8 124.998 H5 C1 H6 110.559
H5 C1 H7 110.559 H6 C1 H7 108.932
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.079      
2 O -0.199      
3 C 0.240      
4 O -0.308      
5 H 0.101      
6 H 0.091      
7 H 0.091      
8 H 0.062      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.948 1.653 0.000 1.905
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.272 -1.190 0.000
y -1.190 -28.001 0.000
z 0.000 0.000 -22.868
Traceless
 xyz
x 6.163 -1.190 0.000
y -1.190 -6.931 0.000
z 0.000 0.000 0.768
Polar
3z2-r21.536
x2-y28.729
xy-1.190
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> 70.877
(<r2>)1/2 8.419