## The interatomic distance between the different atoms of (PEG)200, (PEG)_{300} and (PEG)_{600} at liquid state.

r_{m}: The position of the peaks maxima in the total radial distribution function, *W(r)*, r_{m}/r_{1},: geometrical factor (g.f).

The variation of g.f conserves the singularity of D.R.P. In this model; three atoms *(*** trio**) are in hard contact, the forth one (

**) is free to find its exact position. In these liquids the different values of (g.f) of single bond; C-C, C-O and double bond C = C in a pentagonal chain is shown.**

*the apex*The experiment indicates the fluctuation of the values of the geometrical factors between √3 = (1.7320) (singularity of regular tetrahedron) and √8**/**√3 = 1.6329 diameter (bi-pyramid configuration). The r_{3}/r_{1} shows the effect of medium range order on the local topology of the atomic network for each sample.

The interatomic distance between the different atoms of (PEG)200, (PEG)_{300} and (PEG)_{600} at liquid state.