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

using model chemistry: HSEh1PBE/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HSEh1PBE/3-21G
 hartrees
Energy at 0K-227.560088
Energy at 298.15K-227.564863
HF Energy-227.560088
Nuclear repulsion energy120.722948
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 HSEh1PBE/3-21G
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' 3214 3096 8.72      
2 A' 3106 2992 46.00      
3 A' 3090 2976 21.90      
4 A' 1768 1703 186.09      
5 A' 1561 1504 11.80      
6 A' 1489 1435 8.45      
7 A' 1405 1354 2.39      
8 A' 1207 1163 180.06      
9 A' 1172 1129 83.88      
10 A' 925 891 11.23      
11 A' 768 739 10.29      
12 A' 291 281 17.69      
13 A" 3165 3049 17.09      
14 A" 1547 1490 12.82      
15 A" 1171 1128 0.10      
16 A" 1057 1018 0.19      
17 A" 345 333 34.04      
18 A" 83 80 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 13681.4 cm-1
Scaled (by 0.9633) Zero Point Vibrational Energy (zpe) 13179.2 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 HSEh1PBE/3-21G
ABC
0.64053 0.22643 0.17275

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.383 0.391 0.000
O2 0.000 0.893 0.000
C3 -0.953 -0.082 0.000
O4 -0.723 -1.280 0.000
H5 2.004 1.285 0.000
H6 1.568 -0.218 0.888
H7 1.568 -0.218 -0.888
H8 -1.937 0.396 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.47112.38362.68821.08821.09291.09293.3195
O21.47111.36372.28992.04222.11692.11691.9994
C32.38361.36371.21963.25802.67642.67641.0936
O42.68822.28991.21963.74342.67652.67652.0693
H51.08822.04223.25803.74341.79921.79924.0398
H61.09292.11692.67642.67651.79921.77663.6671
H71.09292.11692.67642.67651.79921.77663.6671
H83.31951.99941.09362.06934.03983.66713.6671

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 114.406 O2 C1 H5 104.882
O2 C1 H6 110.439 O2 C1 H7 110.439
O2 C3 O4 124.763 O2 C3 H8 108.410
O4 C3 H8 126.827 H5 C1 H6 111.160
H5 C1 H7 111.160 H6 C1 H7 108.736
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.412      
2 O -0.499      
3 C 0.435      
4 O -0.470      
5 H 0.240      
6 H 0.240      
7 H 0.240      
8 H 0.227      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.002 1.274 0.000 1.620
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.457 -1.134 0.000
y -1.134 -28.335 0.000
z 0.000 0.000 -22.772
Traceless
 xyz
x 7.097 -1.134 0.000
y -1.134 -7.721 0.000
z 0.000 0.000 0.624
Polar
3z2-r21.249
x2-y29.878
xy-1.134
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.409 0.325 0.000
y 0.325 3.897 0.000
z 0.000 0.000 2.338


<r2> (average value of r2) Å2
<r2> 72.194
(<r2>)1/2 8.497