Current Organic Chemistry - Volume 19, Issue 4, 2015

The present status of what has been known and understood about the concept of cross-conjugation is reviewed first and it has been shown how the structure-activity relationship in acyclic and monocyclic conjugated systems can be understood without elaborated formalism but by gathering the knowledge of the basic HMO of linear polyenes. Then it is shown that the mode of electron flow caused by hetero-atom substitution to th Read More

A graph property P(G), written as a sequence of numbers counting its local partitions, can be expressed as a counting polynomial P(G,x) with the exponents of the indeterminate x showing the extent of partitions p(G), υ p(G) = P(G) while the coefficients are related to the number of partitions occurrence. Definitions and properties of Cluj CJ(G, x) and Ω(G, x) polynomials and their relation with other topological descriptors are pr Read More

Polycyclic aromatic compounds ( PAC ) are a huge class of organic molecules that can be found everywhere. They called attention of scientists by their interesting and sometimes peculiar physical and chemical properties. That is why, there are a number of research articles and books in which their synthesis, properties, reactions, and theoretical investigations have been communicated. In this survey will be outlined several sim Read More

The cut method is a powerful tool for the investigation of distance-based (and some other) molecular structure-descriptors. In this paper a survey on the recent developments of the method is given. The instances of the standard cut method for the Wiener index, the Szeged index, the PI index, the generalized terminal Wiener index, the Gutman index, the edge-Wiener index, and the edge-Szeged index are described, where a st Read More

With the rise of the nanoscience era in general and that of graphene structure and nanopatterns especially their precursors by organic compounds and specifically the benzenoid systems become most regarded due to the benchmarking information they provide and transfer from nano-to-macro chemistry and materials. In this context, chemical graph theory and methodology are reviewed from the fundaments, via a histo Read More

The distinction between interdisciplinarity, multidisciplinarity, and transdisciplinarity is emphasized. Chemistry evolved later as a science than physics, so that in the early 19th century renowned philosophers denied the possibility of mathematics being useful for chemical problems. Later, with the advent of quantum mechanics, chemistry was viewed as reducible to physics. It is argued, however, that mathematical chemist Read More