“…3,4 According to the IUCr definition of isostructurality, "Two crystals are said to be isostructural if they have the same structure, but not necessarily the same unitcell dimensions nor the same chemical composition, with a comparable variability in the atomic coordinates to that of the cell dimensions and chemical composition". 5 It is of interest to study the phenomenon of isostructurality in isostructural polymorphs, [6][7][8][9][10][11] isostructural co-crystals 1,12,13 and isostructural solvates 14 on account of their applications in the pharmaceutical industry. [15][16][17][18][19][20] This behaviour is very common in similar related compounds having different types of structural equivalent functionalities like -H, -CH 3 , -F, -Cl, -Br and I.…”