Neighborhood M-polynomial of titanium compounds

The neighborhood M-polynomial is effective in recovering neighborhood degree sum based topological indices that predict different physical, chemical and biological characteristics of material under investigation. In this work, the neighborhood M-polynomial of Titania nanotube TiO2 and the crystallographic structure of TiF2 are obtained. From the neighborhood M-polynomial, some neighborhood degree sum based topological indices are recovered. Effect of oxygen vacancies on outcomes is discussed. A comparative study among the findings and some well-established degree-based indices is performed.