Cyclic wave functions, molecular systems

Fourier transform, molecular systems, component amplitude analysis cyclic wave functions, 224-228 reciprocal relations, 216-217 Four-state system loop construction ... 

Quantum chemistry aims to understand a large variety of chemical facts. In some systems an interesting feature was obtained whose study and whose application can help to reduce the computational effort considerably this is the transferability. Transfer-ability can be interpreted in several ways. The orbitals, on the one hand, may be considered transferable in the case when certain properties of these orbitals are close to each other to a certain extent (Rothenberg, 1971). The transferability of orbitals can be discussed directly on the other hand too. Orbitals of small molecules can be used for constructing the wave-function of related, larger molecules. This can be done with or without further optimizations. In this interpretation the orbitals are transferable if the molecular properties calculated with and without optimizations are close to each other (O Leary et al, 1975). The transferability of orbitals for cyclic hydrocarbons was discussed exhaustively (Edmiston et al., 1963). 

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