%A LI Jing-jing, BIAN Hong, YU Hai-zheng %T Maximum matching forcing number in some special graphs %0 Journal Article %D 2020 %J JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) %R 10.6040/j.issn.1671-9352.0.2019.613 %P 71-76 %V 55 %N 10 %U {http://lxbwk.njournal.sdu.edu.cn/CN/abstract/article_3350.shtml} %8 2020-10-20 %X The topological index of chemical molecule is a kind of numerical invariant, which can predict indirectly the physical and chemical properties of the corresponding chemical. The reformulated reciprocal degree distance index is a generalized of reciprocal degree distance, defined as:(-overR)t(G)=∑{u,v}⊆V(G)(dG(u)+dG(v))/(dG(u,v)+t), t≥0[1]. Phenylene chain is a kind of important aromatic chemical molecule, which have strongly chemical background. We determined extremal phenylene chains with minimum and maximum reformulated reciprocal degree distance indices in all phenylene chains with n hexagons.