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

using model chemistry: B3LYP/CEP-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 B3LYP/CEP-31G
 hartrees
Energy at 0K-45.580448
Energy at 298.15K-45.585165
Nuclear repulsion energy66.593982
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 B3LYP/CEP-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' 3209 3108 28.93      
2 A' 3128 3029 50.88      
3 A' 3068 2971 35.68      
4 A' 1644 1592 268.70      
5 A' 1496 1449 12.24      
6 A' 1462 1416 9.69      
7 A' 1370 1327 8.45      
8 A' 1193 1155 108.26      
9 A' 1148 1112 186.48      
10 A' 870 843 19.53      
11 A' 725 702 10.81      
12 A' 272 264 17.83      
13 A" 3169 3069 42.45      
14 A" 1490 1443 13.55      
15 A" 1151 1115 0.53      
16 A" 996 964 1.97      
17 A" 331 321 46.40      
18 A" 109 106 0.12      

Unscaled Zero Point Vibrational Energy (zpe) 13415.6 cm-1
Scaled (by 0.9684) Zero Point Vibrational Energy (zpe) 12991.7 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 B3LYP/CEP-31G
ABC
0.63967 0.21243 0.16455

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.404 0.392 0.000
O2 0.000 0.883 0.000
C3 -0.996 -0.076 0.000
O4 -0.808 -1.309 0.000
H5 2.017 1.301 0.000
H6 1.588 -0.215 0.900
H7 1.588 -0.215 -0.900
H8 -1.980 0.419 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.48722.44482.79061.09601.10061.10063.3841
O21.48721.38172.33572.06032.12932.12932.0336
C32.44481.38171.24763.31242.73892.73891.1016
O42.79062.33571.24763.84612.78312.78312.0878
H51.09602.06033.31243.84611.81381.81384.0935
H61.10062.12932.73892.78311.81381.79923.7334
H71.10062.12932.73892.78311.81381.79923.7334
H83.38412.03361.10162.08784.09353.73343.7334

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 116.849 O2 C1 H5 104.785
O2 C1 H6 109.835 O2 C1 H7 109.835
O2 C3 O4 125.253 O2 C3 H8 109.431
O4 C3 H8 125.316 H5 C1 H6 111.323
H5 C1 H7 111.323 H6 C1 H7 109.640
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.382      
2 O -0.151      
3 C -0.164      
4 O -0.145      
5 H 0.219      
6 H 0.201      
7 H 0.201      
8 H 0.221      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.236 1.670 0.000 2.078
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.156 -1.788 0.000
y -1.788 -30.080 0.000
z 0.000 0.000 -23.051
Traceless
 xyz
x 8.409 -1.788 0.000
y -1.788 -9.477 0.000
z 0.000 0.000 1.068
Polar
3z2-r22.135
x2-y211.924
xy-1.788
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.628 0.486 0.000
y 0.486 4.392 0.000
z 0.000 0.000 2.718


<r2> (average value of r2) Å2
<r2> 62.810
(<r2>)1/2 7.925