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

using model chemistry: HF/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/cc-pVTZ
 hartrees
Energy at 0K-227.878912
Energy at 298.15K-227.883973
Nuclear repulsion energy124.052468
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/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' 3295 2999 23.86      
2 A' 3228 2938 54.99      
3 A' 3199 2912 36.59      
4 A' 1976 1798 400.06      
5 A' 1623 1477 11.15      
6 A' 1606 1462 4.25      
7 A' 1533 1396 4.47      
8 A' 1377 1253 379.03      
9 A' 1310 1193 82.43      
10 A' 1028 935 32.43      
11 A' 849 773 10.79      
12 A' 324 295 16.98      
13 A" 3273 2979 29.13      
14 A" 1613 1468 7.74      
15 A" 1290 1174 3.15      
16 A" 1189 1082 2.26      
17 A" 343 312 34.22      
18 A" 160 145 0.25      

Unscaled Zero Point Vibrational Energy (zpe) 14608.1 cm-1
Scaled (by 0.9101) Zero Point Vibrational Energy (zpe) 13294.8 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/cc-pVTZ
ABC
0.70061 0.23189 0.18006

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.353 0.421 0.000
O2 0.000 0.842 0.000
C3 -0.920 -0.094 0.000
O4 -0.721 -1.255 0.000
H5 1.944 1.322 0.000
H6 1.566 -0.166 0.880
H7 1.566 -0.166 -0.880
H8 -1.908 0.354 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.41702.33052.66721.07731.07971.07973.2621
O21.41701.31242.21792.00222.06022.06021.9697
C32.33051.31241.17803.19462.63792.63791.0853
O42.66722.21791.17803.70762.68172.68171.9994
H51.07732.00223.19463.70761.77041.77043.9719
H61.07972.06022.63792.68171.77041.76053.6216
H71.07972.06022.63792.68171.77041.76053.6216
H83.26211.96971.08531.99943.97193.62163.6216

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 117.219 O2 C1 H5 105.978
O2 C1 H6 110.483 O2 C1 H7 110.483
O2 C3 O4 125.812 O2 C3 H8 110.118
O4 C3 H8 124.070 H5 C1 H6 110.321
H5 C1 H7 110.321 H6 C1 H7 109.226
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.055 0.132 0.712 0.038
2 O -0.280 -0.443 -1.389 -0.416
3 C 0.323 0.787 2.016 0.754
4 O -0.389 -0.592 -1.384 -0.581
5 H 0.111 0.047 -0.004 0.071
6 H 0.093 0.050 0.001 0.076
7 H 0.093 0.050 0.001 0.076
8 H 0.104 -0.031 0.039 -0.018


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.864 1.868 0.000 2.058
CHELPG        
AIM 0.280 -0.562 0.000 0.628
ESP 0.903 1.853 0.000 2.061


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.925 -1.418 0.000
y -1.418 -28.594 0.000
z 0.000 0.000 -22.787
Traceless
 xyz
x 6.765 -1.418 0.000
y -1.418 -7.738 0.000
z 0.000 0.000 0.972
Polar
3z2-r21.945
x2-y29.669
xy-1.418
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.713 0.228 0.000
y 0.228 4.442 0.000
z 0.000 0.000 3.236


<r2> (average value of r2) Å2
<r2> 70.059
(<r2>)1/2 8.370