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

using model chemistry: PBEPBE/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBE/cc-pVDZ
 hartrees
Energy at 0K-228.809950
Energy at 298.15K-228.814579
Nuclear repulsion energy118.504512
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 PBEPBE/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3044 3026 21.24      
2 A' 2951 2934 34.71      
3 A' 2828 2811 85.41      
4 A' 1815 1805 347.67      
5 A' 1430 1422 9.33      
6 A' 1399 1391 1.47      
7 A' 1331 1324 0.43      
8 A' 1204 1197 165.91      
9 A' 1070 1063 127.17      
10 A' 999 993 61.45      
11 A' 623 619 4.76      
12 A' 368 366 1.42      
13 A" 3065 3047 16.61      
14 A" 1402 1394 3.86      
15 A" 1121 1114 0.05      
16 A" 981 976 0.12      
17 A" 209 207 3.15      
18 A" 102 101 0.95      

Unscaled Zero Point Vibrational Energy (zpe) 12970.3 cm-1
Scaled (by 0.9942) Zero Point Vibrational Energy (zpe) 12895.1 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 PBEPBE/cc-pVDZ
ABC
1.55882 0.15406 0.14415

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.405 0.925 0.000
O2 0.000 0.638 0.000
C3 0.361 -0.676 0.000
O4 1.513 -1.033 0.000
H5 -2.009 -0.009 0.000
H6 -1.649 1.518 0.904
H7 -1.649 1.518 -0.904
H8 -0.535 -1.363 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.43382.38333.51401.11231.10801.10802.4477
O21.43381.36292.25432.11052.07592.07592.0714
C32.38331.36291.20672.46143.10933.10931.1285
O43.51402.25431.20673.66784.16184.16182.0747
H51.11232.11052.46143.66781.81031.81032.0013
H61.10802.07593.10934.16181.81031.80763.2180
H71.10802.07593.10934.16181.81031.80763.2180
H82.44772.07141.12852.07472.00133.21803.2180

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 116.877 O2 C1 H5 111.350
O2 C1 H6 108.837 O2 C1 H7 108.837
O2 C3 O4 122.524 O2 C3 H8 112.148
O4 C3 H8 125.328 H5 C1 H6 109.240
H5 C1 H7 109.240 H6 C1 H7 109.310
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.045      
2 O -0.191      
3 C 0.178      
4 O -0.182      
5 H 0.037      
6 H 0.060      
7 H 0.060      
8 H -0.007      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -3.616 0.749 0.000 3.693
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.880 0.682 0.000
y 0.682 -23.598 0.000
z 0.000 0.000 -22.785
Traceless
 xyz
x -1.688 0.682 0.000
y 0.682 0.234 0.000
z 0.000 0.000 1.454
Polar
3z2-r22.908
x2-y2-1.282
xy0.682
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.535 -1.178 0.000
y -1.178 4.778 0.000
z 0.000 0.000 2.984


<r2> (average value of r2) Å2
<r2> 83.302
(<r2>)1/2 9.127