Sami Publishing Company (SPC)Eurasian Chemical Communications2717-05352720200701F-leap index of some special classes of bridge and chain graphs82783310756010.33945/SAMI/ECC.2020.7.10ENMohanad AliMohammedDepartment of Mathematics, Open Educational College, Ministry of Education, Al-Qadisiya Centre, Iraq0000-0002-7507-1212Raad SehenHaoerDepartment of Mathematics, Open Educational College, Ministry of Education, Al-Qadisiya Centre, IraqJanetRobertDepartment of Mathematics, Srinivasa Ramanujan Centre, SASTRA Deemed University, Kumbakonam, Tamil Nadu, India0000-0002-2340-9840NatarajanChidambaramDepartment of Mathematics, Srinivasa Ramanujan Centre,
SASTRA Deemed University, Kumbakonam, Tamil Nadu, India0000-0002-1001-3556NarasimhanDevadossDepartment of Mathematics, Srinivasa Ramanujan Centre, SASTRA Deemed University, Kumbakonam, Tamil Nadu, India0000-0001-9375-3754Journal Article20200428The 2-degree of a vertex v in a (molecular) graph G is the number of vertices which are at distance two from v in G. The F-leap index of a molecular graph G is the sum of cubes of the 2-degree of every vertex v in G. In this research study, we have computed the F-leap index of some special classes of bridges and chain graphs. We also have determined the F-leap index of some chemical structures including polyphenyl chains and spiro chains.http://www.echemcom.com/article_107560_e5c6041e9d70a7c630ab2bbf2e8a90b8.pdf