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

using model chemistry: B3PW91/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 B3PW91/cc-pVDZ
 hartrees
Energy at 0K-228.989121
Energy at 298.15K-228.993963
Nuclear repulsion energy122.258964
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 B3PW91/cc-pVDZ
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' 3189 3078 10.55      
2 A' 3060 2953 13.31      
3 A' 3044 2938 73.11      
4 A' 1838 1774 283.92      
5 A' 1467 1416 12.29      
6 A' 1444 1394 5.56      
7 A' 1382 1333 1.01      
8 A' 1240 1197 265.80      
9 A' 1178 1137 34.03      
10 A' 961 928 22.67      
11 A' 778 751 8.70      
12 A' 301 290 13.61      
13 A" 3149 3039 17.25      
14 A" 1452 1401 9.29      
15 A" 1159 1119 0.78      
16 A" 1034 997 0.13      
17 A" 348 336 24.00      
18 A" 108 104 0.13      

Unscaled Zero Point Vibrational Energy (zpe) 13566.1 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 13091.3 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 B3PW91/cc-pVDZ
ABC
0.66838 0.23032 0.17709

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.355 0.408 0.000
O2 0.000 0.874 0.000
C3 -0.929 -0.090 0.000
O4 -0.714 -1.274 0.000
H5 1.979 1.310 0.000
H6 1.557 -0.200 0.894
H7 1.557 -0.200 -0.894
H8 -1.932 0.383 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.43282.33812.66681.09601.09991.09993.2873
O21.43281.33932.26362.02602.09202.09201.9936
C32.33811.33931.20303.22742.64432.64431.1091
O42.66682.26361.20303.73182.66652.66652.0567
H51.09602.02603.22743.73181.80431.80434.0192
H61.09992.09202.64432.66651.80431.78773.6487
H71.09992.09202.64432.66651.80431.78773.6487
H83.28731.99361.10912.05674.01923.64873.6487

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 114.973 O2 C1 H5 105.719
O2 C1 H6 110.695 O2 C1 H7 110.695
O2 C3 O4 125.759 O2 C3 H8 108.665
O4 C3 H8 125.576 H5 C1 H6 110.505
H5 C1 H7 110.505 H6 C1 H7 108.713
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.051      
2 O -0.257      
3 C 0.238      
4 O -0.254      
5 H 0.061      
6 H 0.063      
7 H 0.063      
8 H 0.034      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.928 1.529 0.000 1.788
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.139 -1.125 0.000
y -1.125 -27.510 0.000
z 0.000 0.000 -22.627
Traceless
 xyz
x 5.930 -1.125 0.000
y -1.125 -6.627 0.000
z 0.000 0.000 0.697
Polar
3z2-r21.395
x2-y28.371
xy-1.125
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 70.883
(<r2>)1/2 8.419