Eugene Babaev "Intuitive Chemical Topology Concepts" (c)## Table of contents

2. Some Useful Concepts of Visual Topology2.1. Graphs3. Explicit Concepts of Molecular Topology3.1. Classical Chemical Models3.2. Graphs and Surfaces in Physical ModelsMolecular graph

Homeomorphism in C_{n}H_{2n+x series}Molecular graphs in physical models4. Intuitive Chemical Concepts Related to TopologyIntuitive cut-and-paste5. Topology of Lewis Formula: Pseudographs, Graphoids and Topoids5.1. Molecular Pseudograph(i)5.2. Molecular GraphoidCycles and electron count6. Some Properties of Molecular Topoids6.1. Overview and Manipulations with Topoids7. Invariance of the Euler Characteristic in Chemical ReactionsLoss of connectedness (case of boa and elephant)8. Homeomorphism of TopoidsCH_{2}group9. Surfaces with Jordan Curves as Exact Images of Graphs9.1. Idea and Algorithm of Representing Graph by Labeled Surface10. Chemical Applications of Surfaces with Embedded Jordan Curves10.1. Chemical Isomerism and Homology: a Novel Viewpoint11. Delocalized Bonds and Hypertopoids11.1. Attempts to Use Molecular Graphs and Hypergraphs11.2. Pseudomanifolds and Their Euler Characteristic

11.3. Molecular Hypertopoids and their Homeomorphism

11.4. Interconversion of Molecular Hypertopoids

Heterolytic processes

Topological design of reaction mechanisms12. Orientation, Spin and Nonorientable Surfaces of Free Radicals