Abstract
Background: The valency of an atom in a molecular structure is the number of its
neighboring atoms. A large number of valency based molecular invariants have been conceived,
which correlate certain physio-chemical properties like boiling point, stability, strain energy and
many more chemical compounds.
Objective: Our aim is to study the valency based molecular invariants for four hexa chemical
structures, namely hexagonal network, honeycomb network, oxide network and silicate sheet
network.
Methods: We use the technique of atom-bonds partition according to the valences of atoms to find
results.
Results and Conclusion: Exact values of valency-based molecular invariants, namely the Randi
index, atom bond connectivity index, geometric arithmetic index, harmonic index, Zagreb indices,
Zagreb polynomials, F-index and F-polynomial, are found for four hexa chemical structures.
Keywords:
Valency, Randić index, harmonic index, ABC index, GA index, Zagreb index, forgotten index, network
Graphical Abstract
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