Analytical formula for calculating transmission coefficient of one-dimensional molecules with single impurity

We have derived a new analytical formula to calculate the transmission coefficient of one-dimensional molecular wires with a single impurity in a convenient and practical way. Such desirable properties can be instantly noticed in the detailed number of adjustable parameters and in the adequately flexible controlling of the chosen position of the impurity in the wire. Furthermore, it is elegantly simple, readily programmable, and reliable. This reasonable conclusion is gained by carefully testing the formula on a considerable number of structures ranging from very simple and basic units and ending with large and complicated systems. As a result, an impressive matching has been found between our analytical model and numerical and analytical calculations of other academic researchers. Such practical comparison supports its undeniable success and reasonable efficiency.