Document Type : Research Paper
Institute of Engineering and Technology, India
IPS Academy, India
Technische Universitat Iimenau, Ilmenau
The Sadhana index (Sd) is a newly introduced cyclic index. Efficient formulae for calculating the Sd (Sadhana) index of linear phenylenes are given and a simple relation is established between the Sd index of phenylenes and of the corresponding hexagonal sequences.