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/6-311G**

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/6-311G**
 hartrees
Energy at 0K-227.851295
Energy at 298.15K-227.856359
Nuclear repulsion energy123.954547
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/6-311G**
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' 3311 3008 26.29      
2 A' 3243 2946 60.32      
3 A' 3206 2913 35.53      
4 A' 1990 1808 413.87      
5 A' 1624 1475 11.47      
6 A' 1606 1459 3.55      
7 A' 1533 1392 4.72      
8 A' 1377 1251 391.27      
9 A' 1311 1191 85.44      
10 A' 1030 936 34.95      
11 A' 852 774 11.34      
12 A' 326 297 17.48      
13 A" 3283 2982 34.05      
14 A" 1613 1466 7.76      
15 A" 1288 1170 3.29      
16 A" 1187 1078 3.83      
17 A" 345 314 38.35      
18 A" 160 145 0.18      

Unscaled Zero Point Vibrational Energy (zpe) 14642.0 cm-1
Scaled (by 0.9085) Zero Point Vibrational Energy (zpe) 13302.3 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/6-311G**
ABC
0.70488 0.23189 0.18034

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.354 0.420 0.000
O2 0.000 0.844 0.000
C3 -0.921 -0.095 0.000
O4 -0.721 -1.255 0.000
H5 1.945 1.322 0.000
H6 1.566 -0.169 0.882
H7 1.566 -0.169 -0.882
H8 -1.909 0.357 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.41882.33262.66651.07871.08171.08173.2642
O21.41881.31472.21892.00322.06292.06291.9705
C32.33261.31471.17783.19732.63982.63981.0865
O42.66652.21891.17783.70802.68062.68062.0028
H51.07872.00323.19733.70801.77381.77383.9737
H61.08172.06292.63982.68061.77381.76433.6239
H71.08172.06292.63982.68061.77381.76433.6239
H83.26421.97051.08652.00283.97373.62393.6239

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 117.103 O2 C1 H5 105.852
O2 C1 H6 110.456 O2 C1 H7 110.456
O2 C3 O4 125.722 O2 C3 H8 109.936
O4 C3 H8 124.342 H5 C1 H6 110.382
H5 C1 H7 110.382 H6 C1 H7 109.278
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.007      
2 O -0.410      
3 C 0.444      
4 O -0.437      
5 H 0.105      
6 H 0.105      
7 H 0.105      
8 H 0.095      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.872 1.783 0.000 1.985
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.698 -1.388 0.000
y -1.388 -28.778 0.000
z 0.000 0.000 -22.691
Traceless
 xyz
x 7.037 -1.388 0.000
y -1.388 -8.083 0.000
z 0.000 0.000 1.046
Polar
3z2-r22.092
x2-y210.080
xy-1.388
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.277 0.206 0.000
y 0.206 4.138 0.000
z 0.000 0.000 2.852


<r2> (average value of r2) Å2
<r2> 70.084
(<r2>)1/2 8.372