Vertex-degree-based molecular structure descriptors of benzenoid systems and phenylenes

Abstract

Several recently published papers report expressions for various vertex-degree-based molecular structure descriptors of benzenoid systems and phenylenes. We deduce here the general expression for these descriptors, and show that a simple and generally valid relation exists between such structure descriptors of phenylenes and their hexagonal squeezes.

Keywords

• molecular structure descriptor
• topological index
• degree-based molecular structure descriptor
• benzenoid system
• phenylene
• hexagonal squeeze