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

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
 hartrees
Energy at 0K-227.672809
Energy at 298.15K-227.677738
Nuclear repulsion energy121.586924
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
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' 3374 3047 13.55      
2 A' 3361 3035 34.43      
3 A' 3245 2930 20.69      
4 A' 1874 1692 341.47      
5 A' 1658 1497 10.22      
6 A' 1621 1464 6.16      
7 A' 1526 1378 12.59      
8 A' 1350 1219 317.71      
9 A' 1297 1171 144.75      
10 A' 968 874 27.00      
11 A' 818 739 16.20      
12 A' 297 268 22.12      
13 A" 3334 3010 23.99      
14 A" 1651 1491 10.16      
15 A" 1282 1157 2.96      
16 A" 1159 1047 3.08      
17 A" 336 303 62.01      
18 A" 129 116 0.08      

Unscaled Zero Point Vibrational Energy (zpe) 14639.8 cm-1
Scaled (by 0.9029) Zero Point Vibrational Energy (zpe) 13218.3 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/6-31G
ABC
0.69646 0.21807 0.17136

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.398 0.457 0.000
O2 0.000 0.839 0.000
C3 -0.951 -0.102 0.000
O4 -0.742 -1.291 0.000
H5 1.941 1.384 0.000
H6 1.622 -0.121 0.882
H7 1.622 -0.121 -0.882
H8 -1.929 0.344 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.44892.41382.76331.07431.07831.07833.3283
O21.44891.33752.25592.01622.08102.08101.9914
C32.41381.33751.20743.25102.71932.71931.0749
O42.76332.25591.20743.78902.78122.78122.0200
H51.07432.01623.25103.78901.77351.77354.0073
H61.07832.08102.71932.78121.77351.76403.6879
H71.07832.08102.71932.78121.77351.76403.6879
H83.32831.99141.07492.02004.00733.68793.6879

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 120.001 O2 C1 H5 105.110
O2 C1 H6 109.995 O2 C1 H7 109.995
O2 C3 O4 124.781 O2 C3 H8 110.807
O4 C3 H8 124.413 H5 C1 H6 110.952
H5 C1 H7 110.952 H6 C1 H7 109.750
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.133 0.251    
2 O -0.691 -0.653    
3 C 0.586 1.017    
4 O -0.540 -0.687    
5 H 0.195 0.038    
6 H 0.188 0.048    
7 H 0.188 0.048    
8 H 0.207 -0.060    


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.082 1.816 0.000 2.114
CHELPG 1.136 1.778 0.000 2.110
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.809 -1.412 0.000
y -1.412 -30.615 0.000
z 0.000 0.000 -23.048
Traceless
 xyz
x 9.022 -1.412 0.000
y -1.412 -10.187 0.000
z 0.000 0.000 1.164
Polar
3z2-r22.329
x2-y212.806
xy-1.412
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.014 0.284 0.000
y 0.284 4.129 0.000
z 0.000 0.000 2.446


<r2> (average value of r2) Å2
<r2> 73.082
(<r2>)1/2 8.549