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

using model chemistry: PBEPBE/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 PBEPBE/cc-pVTZ
 hartrees
Energy at 0K-228.892543
Energy at 298.15K-228.897317
Nuclear repulsion energy121.524612
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-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' 3097 3075 11.07      
2 A' 2985 2964 17.42      
3 A' 2948 2928 64.78      
4 A' 1749 1737 252.38      
5 A' 1445 1435 9.28      
6 A' 1408 1398 5.59      
7 A' 1341 1332 0.87      
8 A' 1174 1166 133.58      
9 A' 1130 1122 123.68      
10 A' 907 901 19.14      
11 A' 751 746 6.85      
12 A' 290 288 12.78      
13 A" 3057 3036 16.81      
14 A" 1429 1419 9.90      
15 A" 1129 1121 0.70      
16 A" 986 979 0.14      
17 A" 346 344 21.65      
18 A" 104 103 0.17      

Unscaled Zero Point Vibrational Energy (zpe) 13138.0 cm-1
Scaled (by 0.9931) Zero Point Vibrational Energy (zpe) 13047.3 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 PBEPBE/cc-pVTZ
ABC
0.65959 0.22730 0.17467

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.367 0.408 0.000
O2 0.000 0.883 0.000
C3 -0.934 -0.091 0.000
O4 -0.721 -1.282 0.000
H5 1.990 1.307 0.000
H6 1.560 -0.200 0.893
H7 1.560 -0.200 -0.893
H8 -1.935 0.382 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.44732.35482.68611.09371.09741.09743.3022
O21.44731.35042.28232.03412.09922.09921.9990
C32.35481.35041.20933.24112.65202.65201.1073
O42.68612.28231.20933.74832.67832.67832.0599
H51.09372.03413.24113.74831.80351.80354.0322
H61.09742.09922.65202.67831.80351.78573.6546
H71.09742.09922.65202.67831.80351.78573.6546
H83.30221.99901.10732.05994.03223.65463.6546

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 114.592 O2 C1 H5 105.513
O2 C1 H6 110.407 O2 C1 H7 110.407
O2 C3 O4 126.068 O2 C3 H8 108.444
O4 C3 H8 125.488 H5 C1 H6 110.797
H5 C1 H7 110.797 H6 C1 H7 108.899
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.114      
2 O -0.166      
3 C 0.199      
4 O -0.275      
5 H 0.108      
6 H 0.098      
7 H 0.098      
8 H 0.053      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.970 1.563 0.000 1.840
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.684 -1.106 0.000
y -1.106 -28.040 0.000
z 0.000 0.000 -23.175
Traceless
 xyz
x 5.924 -1.106 0.000
y -1.106 -6.611 0.000
z 0.000 0.000 0.687
Polar
3z2-r21.374
x2-y28.356
xy-1.106
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.769 0.349 0.000
y 0.349 5.063 0.000
z 0.000 0.000 3.570


<r2> (average value of r2) Å2
<r2> 71.910
(<r2>)1/2 8.480