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

using model chemistry: B1B95/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/3-21G
 hartrees
Energy at 0K-227.705270
Energy at 298.15K-227.710109
Nuclear repulsion energy120.806758
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 B1B95/3-21G
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' 3212 3073 9.35      
2 A' 3102 2967 44.49      
3 A' 3087 2954 22.29      
4 A' 1757 1681 181.46      
5 A' 1559 1491 11.07      
6 A' 1486 1422 8.25      
7 A' 1399 1338 2.33      
8 A' 1201 1149 168.39      
9 A' 1165 1115 95.38      
10 A' 920 880 11.52      
11 A' 764 731 10.03      
12 A' 294 282 17.53      
13 A" 3161 3024 17.83      
14 A" 1544 1477 12.29      
15 A" 1166 1115 0.15      
16 A" 1051 1006 0.26      
17 A" 346 331 33.60      
18 A" 121 115 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 13666.6 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 13074.9 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 B1B95/3-21G
ABC
0.63721 0.22792 0.17335

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.381 0.384 0.000
O2 0.000 0.896 0.000
C3 -0.955 -0.080 0.000
O4 -0.718 -1.276 0.000
H5 2.007 1.272 0.000
H6 1.560 -0.226 0.887
H7 1.560 -0.226 -0.887
H8 -1.938 0.395 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.47242.38122.67661.08651.09121.09123.3187
O21.47241.36472.28742.04222.11582.11582.0013
C32.38121.36471.21953.25572.67032.67031.0920
O42.67662.28741.21953.73132.66092.66092.0690
H51.08652.04223.25573.73131.79731.79734.0412
H61.09122.11582.67032.66091.79731.77403.6613
H71.09122.11582.67032.66091.79731.77403.6613
H83.31872.00131.09202.06904.04123.66133.6613

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 114.074 O2 C1 H5 104.882
O2 C1 H6 110.352 O2 C1 H7 110.352
O2 C3 O4 124.442 O2 C3 H8 108.593
O4 C3 H8 126.965 H5 C1 H6 111.240
H5 C1 H7 111.240 H6 C1 H7 108.747
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.396      
2 O -0.496      
3 C 0.431      
4 O -0.464      
5 H 0.234      
6 H 0.235      
7 H 0.235      
8 H 0.222      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.980 1.240 0.000 1.581
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.388 -1.117 0.000
y -1.117 -28.239 0.000
z 0.000 0.000 -22.713
Traceless
 xyz
x 7.088 -1.117 0.000
y -1.117 -7.689 0.000
z 0.000 0.000 0.601
Polar
3z2-r21.201
x2-y29.851
xy-1.117
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.437 0.324 0.000
y 0.324 3.899 0.000
z 0.000 0.000 2.338


<r2> (average value of r2) Å2
<r2> 71.942
(<r2>)1/2 8.482