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

using model chemistry: mPW1PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/6-31G*
 hartrees
Energy at 0K-229.000063
Energy at 298.15K-229.004958
Nuclear repulsion energy122.661715
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 mPW1PW91/6-31G*
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' 3222 3055 13.27      
2 A' 3108 2947 27.82      
3 A' 3102 2942 56.28      
4 A' 1868 1771 279.87      
5 A' 1530 1450 10.70      
6 A' 1497 1419 4.88      
7 A' 1424 1350 1.77      
8 A' 1278 1212 268.64      
9 A' 1211 1149 37.33      
10 A' 983 932 22.68      
11 A' 791 750 9.22      
12 A' 304 288 15.26      
13 A" 3187 3022 18.20      
14 A" 1521 1442 8.41      
15 A" 1195 1133 0.89      
16 A" 1051 996 0.43      
17 A" 355 337 27.19      
18 A" 128 122 0.07      

Unscaled Zero Point Vibrational Energy (zpe) 13875.2 cm-1
Scaled (by 0.9483) Zero Point Vibrational Energy (zpe) 13157.9 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 mPW1PW91/6-31G*
ABC
0.67272 0.23171 0.17814

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.351 0.407 0.000
O2 0.000 0.872 0.000
C3 -0.926 -0.088 0.000
O4 -0.712 -1.272 0.000
H5 1.971 1.302 0.000
H6 1.548 -0.196 0.889
H7 1.548 -0.196 -0.889
H8 -1.923 0.373 0.000

Atom - Atom Distances (Å)
  C1 O2 C3 O4 H5 H6 H7 H8
C11.42902.33012.65991.08831.09171.09173.2744
O21.42901.33412.25922.01702.08012.08011.9869
C32.33011.33411.20253.21272.63052.63051.0988
O42.65992.25921.20253.71762.65602.65602.0421
H51.08832.01703.21273.71761.79201.79204.0031
H61.09172.08012.63052.65601.79201.77703.6277
H71.09172.08012.63052.65601.79201.77703.6277
H83.27441.98691.09882.04214.00313.62773.6277

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 114.933 O2 C1 H5 105.701
O2 C1 H6 110.503 O2 C1 H7 110.503
O2 C3 O4 125.836 O2 C3 H8 109.127
O4 C3 H8 125.037 H5 C1 H6 110.577
H5 C1 H7 110.577 H6 C1 H7 108.957
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.296      
2 O -0.413      
3 C 0.381      
4 O -0.429      
5 H 0.195      
6 H 0.198      
7 H 0.198      
8 H 0.166      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.955 1.572 0.000 1.840
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.913 -1.139 0.000
y -1.139 -27.720 0.000
z 0.000 0.000 -22.603
Traceless
 xyz
x 6.249 -1.139 0.000
y -1.139 -6.962 0.000
z 0.000 0.000 0.713
Polar
3z2-r21.426
x2-y28.807
xy-1.139
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> 70.496
(<r2>)1/2 8.396