University of Kashan Iranian Journal of Mathematical Chemistry 2228-6489 9 4 2018 12 01 An Application of Geometrical Isometries in Non-planar Molecules 255 261 45090 10.22052/ijmc.2017.51462.1186 EN A. A. Rezaei University of Kashan A. Reisi-Vanani University of Kashan S. Masoum University of Kashan Journal Article 2016 04 06 In this paper we introduce a novel methodology to transmit the origin to the center of a polygon in a molecule structure such that the special axis be perpendicular to the plane containing the polygon. The<br /> mathematical calculation are described completely and the algorithm will be showed as a computer program. frame isometry orthogonal transformation polygon Non-planar polycyclic molecule https://ijmc.kashanu.ac.ir/article_45090_b0e5726e71cd6e6f99f64bd79fa9d5a6.pdf