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

using model chemistry: PBEPBE/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBE/6-31G(2df,p)
 hartrees
Energy at 0K-228.820830
Energy at 298.15K-228.825588
Nuclear repulsion energy121.592420
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 PBEPBE/6-31G(2df,p)
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' 3108 3076 10.98      
2 A' 2989 2958 16.94      
3 A' 2952 2921 64.48      
4 A' 1773 1754 222.03      
5 A' 1444 1430 9.52      
6 A' 1411 1396 4.84      
7 A' 1350 1336 0.75      
8 A' 1181 1169 152.05      
9 A' 1139 1127 87.29      
10 A' 922 912 16.31      
11 A' 752 744 6.72      
12 A' 291 288 12.58      
13 A" 3068 3036 15.50      
14 A" 1429 1414 7.89      
15 A" 1134 1123 0.71      
16 A" 992 982 0.00      
17 A" 350 347 19.30      
18 A" 94 93 0.14      

Unscaled Zero Point Vibrational Energy (zpe) 13188.7 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 13052.9 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 PBEPBE/6-31G(2df,p)
ABC
0.65636 0.22884 0.17537

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.360 0.404 0.000
O2 0.000 0.887 0.000
C3 -0.933 -0.090 0.000
O4 -0.716 -1.281 0.000
H5 1.993 1.300 0.000
H6 1.552 -0.209 0.894
H7 1.552 -0.209 -0.894
H8 -1.935 0.389 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.44372.34562.67411.09741.10101.10103.2950
O21.44371.35082.28342.03542.10032.10031.9977
C32.34561.35081.21043.23922.64362.64361.1104
O42.67412.28341.21043.74212.66362.66362.0669
H51.09742.03543.23923.74211.80901.80904.0320
H61.10102.10032.64362.66361.80901.78853.6490
H71.10102.10032.64362.66361.80901.78853.6490
H83.29501.99771.11042.06694.03203.64903.6490

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 114.100 O2 C1 H5 105.641
O2 C1 H6 110.527 O2 C1 H7 110.527
O2 C3 O4 126.040 O2 C3 H8 108.120
O4 C3 H8 125.840 H5 C1 H6 110.756
H5 C1 H7 110.756 H6 C1 H7 108.629
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.282      
2 O -0.156      
3 C 0.145      
4 O -0.276      
5 H 0.147      
6 H 0.155      
7 H 0.155      
8 H 0.113      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.942 1.477 0.000 1.752
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.486 -1.049 0.000
y -1.049 -27.213 0.000
z 0.000 0.000 -22.663
Traceless
 xyz
x 5.452 -1.049 0.000
y -1.049 -6.139 0.000
z 0.000 0.000 0.687
Polar
3z2-r21.374
x2-y27.727
xy-1.049
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.368 0.384 0.000
y 0.384 4.593 0.000
z 0.000 0.000 3.196


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000