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

rm: The position of the peaks maxima in the total radial distribution function, W(r), rm/r1,: 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 (the apex) 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 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 r3/r1 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.