return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3OCH2 (methoxymethyl radical)

using model chemistry: G3B3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 2A
Energy calculated at G3B3
 hartrees
Energy at 0K-154.237051
Energy at 298.15K-154.231650
HF Energy-154.361822
Nuclear repulsion energy77.190729
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 B3LYP/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 3262 3133 25.24      
2 A 3155 3030 24.04      
3 A 3112 2989 27.27      
4 A 3079 2957 55.53      
5 A 3020 2900 53.55      
6 A 1531 1470 12.57      
7 A 1521 1461 2.95      
8 A 1515 1455 3.91      
9 A 1478 1420 7.45      
10 A 1300 1249 138.08      
11 A 1264 1214 26.44      
12 A 1182 1135 1.39      
13 A 1150 1105 6.33      
14 A 975 936 31.37      
15 A 681 654 37.05      
16 A 431 414 3.92      
17 A 303 291 8.98      
18 A 174 167 1.69      

Unscaled Zero Point Vibrational Energy (zpe) 14567.1 cm-1
Scaled (by 0.9603) Zero Point Vibrational Energy (zpe) 13988.8 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 B3LYP/6-31G*
ABC
1.57378 0.35474 0.30836

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.090 -0.541 -0.046
C2 -1.138 0.168 0.016
C3 1.204 0.229 0.081
H4 -1.935 -0.559 -0.154
H5 -1.272 0.638 0.999
H6 -1.183 0.945 -0.761
H7 2.122 -0.337 -0.029
H8 1.152 1.260 -0.270

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7 H8
O11.42031.35982.02882.08322.08422.04212.1029
C21.42032.34381.09201.09771.09963.29972.5531
C31.35982.34383.24502.67212.63061.08431.0904
H42.02881.09203.24501.78901.78774.06553.5850
H52.08321.09772.67211.78901.78863.67812.8055
H62.08421.09962.63061.78771.78863.62022.4069
H72.04213.29971.08434.06553.67813.62021.8841
H82.10292.55311.09043.58502.80552.40691.8841

picture of methoxymethyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H4 107.245 O1 C2 H5 111.259
O1 C2 H6 111.322 O1 C3 H7 113.204
O1 C3 H8 118.132 C2 O1 C3 115.374
H4 C2 H5 109.273 H4 C2 H6 109.001
H5 C2 H6 108.693 H7 C3 H8 119.786
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.385      
2 C -0.205      
3 C -0.136      
4 H 0.165      
5 H 0.153      
6 H 0.144      
7 H 0.143      
8 H 0.122      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.851 0.994 -0.305 1.344
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


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> 48.687
(<r2>)1/2 6.978