If I got it properly: make simple research, on spare time, accessing a lab.
Take pure n-alkanes: for instance pentane to decane. freeze them with liquid nitrogen, measure accurately the density at 77K. Check if any odd-even effect exists on the solid density at identical temperature.
We need alkanes with a very wide liquid range as computer cooling fluids, transformer oil, airliner hydraulic fluid...https://www.chemicalforums.com/index.php?topic=56069
One strategy would take a jerrycan of petrol distillate like heating oil, then successively distil and freeze the candidates until the remaining mixture stays liquid from, say, -100°C to +240°C. If enough liquid is obtained that way, it can be the industrial process. If not, analyse to tell what molecules (and possibly categories of molecules, but that's badly difficult) are interesting for future synthesis.
Synthesize diazetidylcyclopropane, say from dibromocyclopropane and azetidinehttps://www.chemicalforums.com/index.php?topic=86972.0
tell how easily this runs, what are the melting point, boiling point, density, flash point.
Does that fit the difficulty and equipment?