Multiplicative degree-Kirchhoff index and number of spanning trees of a zigzag polyhex nanotube TUHC[2n, 2]

Let L_n denote the linear hexagonal chain containing n hexagons. Then identifying the opposite lateral edges of L_n in ordered way yields TUHC[2n, 2] , the zigzag polyhex nanotube, whereas identifying those of L_n in reversed way yields M_n, the hexagonal Möbius chain. In this article, we first obtain the explicit formulae of the multiplicative degree-Kirchhoff index, the Kemeny's invariant, the total number of spanning trees of TUHC[2n, 2] , respectively. Then we show that the multiplicative degree-Kirchhoff index of TUHC[2n, 2] is approximately one-third of its Gutman index. Based on these obtained results we can at last get the corresponding results for M_n.