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

using model chemistry: HF/daug-cc-pVTZ

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/daug-cc-pVTZ
 hartrees
Energy at 0K-227.882750
Energy at 298.15K-227.887793
HF Energy-227.882750
Nuclear repulsion energy124.021338
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/daug-cc-pVTZ
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' 3297 2982 21.84      
2 A' 3231 2923 49.08      
3 A' 3201 2895 36.58      
4 A' 1965 1778 422.87      
5 A' 1621 1466 12.25      
6 A' 1604 1451 4.48      
7 A' 1531 1385 4.38      
8 A' 1376 1244 376.42      
9 A' 1308 1184 85.08      
10 A' 1025 928 33.13      
11 A' 846 766 10.28      
12 A' 323 292 17.05      
13 A" 3274 2962 26.41      
14 A" 1612 1458 8.43      
15 A" 1287 1165 3.15      
16 A" 1187 1073 1.78      
17 A" 342 309 34.34      
18 A" 159 144 0.30      

Unscaled Zero Point Vibrational Energy (zpe) 14594.9 cm-1
Scaled (by 0.9046) Zero Point Vibrational Energy (zpe) 13202.5 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/daug-cc-pVTZ
ABC
0.70795 0.23155 0.18031

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/daug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.354 0.423 0.000
O2 0.000 0.841 0.000
C3 -0.920 -0.094 0.000
O4 -0.722 -1.256 0.000
H5 1.942 1.325 0.000
H6 1.567 -0.164 0.881
H7 1.567 -0.164 -0.881
H8 -1.908 0.353 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.41762.33212.67031.07711.07951.07953.2634
O21.41761.31202.21822.00162.05982.05981.9698
C32.33211.31201.17853.19472.63922.63921.0850
O42.67032.21821.17853.70972.68492.68491.9990
H51.07712.00163.19473.70971.77061.77063.9713
H61.07952.05982.63922.68491.77061.76133.6225
H71.07952.05982.63922.68491.77061.76133.6225
H83.26341.96981.08501.99903.97133.62253.6225

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 117.339 O2 C1 H5 105.900
O2 C1 H6 110.423 O2 C1 H7 110.423
O2 C3 O4 125.835 O2 C3 H8 110.165
O4 C3 H8 124.000 H5 C1 H6 110.369
H5 C1 H7 110.369 H6 C1 H7 109.321
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -1.261      
2 O -0.913      
3 C -0.098      
4 O -1.189      
5 H 0.619      
6 H 0.711      
7 H 0.711      
8 H 1.420      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.876 1.899 0.000 2.091
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.077 -1.429 0.000
y -1.429 -28.815 0.000
z 0.000 0.000 -22.901
Traceless
 xyz
x 6.780 -1.429 0.000
y -1.429 -7.825 0.000
z 0.000 0.000 1.045
Polar
3z2-r22.090
x2-y29.737
xy-1.429
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.115 0.257 0.000
y 0.257 4.818 0.000
z 0.000 0.000 3.634


<r2> (average value of r2) Å2
<r2> 70.214
(<r2>)1/2 8.379