return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: HF/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 HF/6-31G(2df,p)
 hartrees
Energy at 0K-227.813782
Energy at 298.15K-227.818836
Nuclear repulsion energy124.072026
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 HF/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' 3307 2995 24.12      
2 A' 3229 2924 54.19      
3 A' 3206 2903 36.67      
4 A' 1998 1809 366.97      
5 A' 1623 1470 9.87      
6 A' 1606 1455 4.15      
7 A' 1535 1390 4.92      
8 A' 1378 1247 370.61      
9 A' 1313 1189 71.94      
10 A' 1035 937 29.27      
11 A' 849 769 11.04      
12 A' 326 295 16.97      
13 A" 3288 2977 27.61      
14 A" 1613 1460 5.92      
15 A" 1291 1169 3.10      
16 A" 1193 1081 3.88      
17 A" 346 313 32.85      
18 A" 158 143 0.15      

Unscaled Zero Point Vibrational Energy (zpe) 14645.3 cm-1
Scaled (by 0.9055) Zero Point Vibrational Energy (zpe) 13261.4 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 HF/6-31G(2df,p)
ABC
0.70442 0.23285 0.18089

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.350 0.418 0.000
O2 0.000 0.845 0.000
C3 -0.919 -0.094 0.000
O4 -0.719 -1.254 0.000
H5 1.947 1.317 0.000
H6 1.561 -0.173 0.882
H7 1.561 -0.173 -0.882
H8 -1.908 0.358 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.41612.32552.65991.07981.08191.08193.2589
O21.41611.31352.21912.00382.06152.06151.9696
C32.32551.31351.17763.19452.63262.63261.0879
O42.65992.21911.17763.70412.67252.67252.0035
H51.07982.00383.19453.70411.77401.77403.9733
H61.08192.06152.63262.67251.77401.76303.6185
H71.08192.06152.63262.67251.77401.76303.6185
H83.25891.96961.08792.00353.97333.61853.6185

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 116.803 O2 C1 H5 106.020
O2 C1 H6 110.521 O2 C1 H7 110.521
O2 C3 O4 125.856 O2 C3 H8 109.848
O4 C3 H8 124.296 H5 C1 H6 110.308
H5 C1 H7 110.308 H6 C1 H7 109.135
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.185      
2 O -0.384      
3 C 0.352      
4 O -0.411      
5 H 0.159      
6 H 0.159      
7 H 0.159      
8 H 0.150      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.836 1.773 0.000 1.960
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.807 -1.363 0.000
y -1.363 -28.150 0.000
z 0.000 0.000 -22.571
Traceless
 xyz
x 6.553 -1.363 0.000
y -1.363 -7.461 0.000
z 0.000 0.000 0.908
Polar
3z2-r21.816
x2-y29.342
xy-1.363
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.466 0.251 0.000
y 0.251 4.156 0.000
z 0.000 0.000 3.001


<r2> (average value of r2) Å2
<r2> 69.789
(<r2>)1/2 8.354