The definition of the graph isomorphism has been generalized for a more precise description of molecular structure. The adjacency matrix and different topological indices were modified with the help of the complex numbers. Some of the compounds were characterized. The obtained indices were substantiated to be more isomer sensitive than the 2D ones. The quantitative structure−property relationship was ascertained in an alkene series (r > 0.99).

We have developed novel antibiocorrosive multifunctional hybrid materials based on functionalizedperfluoroalkylmethacrylate copolymerswith epoxy groups in main chainsand selected biologically active compounds.The hybrids are transparent, showgood adhesion to various surfaces (plastic, wood),high viscoelastic recovery in scratch testing,low wear rates and glass transitions above 323 K. No phase separation is seen in scanning electron micrography. Enhanced mechanical strength and good abrasion resistance are advantages for uses of our protective and antibiocorrosive coatings in various applications including protection of cultural heritage.

A simple graph-theory-based model is put forward, by means of which it is possible to express the energy difference between geometrically non-equivalent forms of a conjugated polyene. This is achieved by modifying the adjacency matrix of the molecular graph, and including into it information on cis/trans constellations. The total ?-electron energy thus calculated is in excellent agreement with the enthalpies of the underlying isomers and conformers. [Projekat Ministarstva nauke Republike Srbije, br. 174033]

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New silicon-organic polyepoxides containing epoxy side groups attached to their main chains have been synthesised by hydride addition (hydrosilylation) of dihydrosiloxanes with the diallyl ether of an epoxidised glycerol group situated at the tertiary carbon atom. General features of the reaction were studied and its kinetic rate constants and reaction order determined. The relative reactivities of various dihydridesiloxanes in the hydrosilylation reaction were determined. The modification of the polyepoxides introduced chelates containing Cu, Ni, Mn and Co atoms into the main chain. The composition and structure of the synthesised polymers were established from elemental, IR and NMR spectral analyses and from DSC, DTA and TGA data. It was established that the glass transition temperature (Tg) and thermo-oxidative stability of the chelate-containing polymers considerably exceeded those of the unmodified polyepoxides.