Usefulness of combinations of vertex-degree weighted path indices 
and elements of a Universal matrix 
 
Anton Perdih 
Faculty of Chemistry and Chemical Technology, University of Ljubljana (retired) 
Večna pot 113, 1000 Ljubljana, Slovenia 
*Corresponding author: E-mail: a.perdih@gmail.com 
 
Appendix 1 
 
Boiling points of octanes were taken from Li and converted °C to K. 
Octane isomer Abbrev. BP (K) 
n-octane Oct 398.805 
2-methylheptane 2M7 390.797 
3-methylheptane 3M7 392.075 
4-methylheptane 4M7 390.859 
3-ethylhexane 3Et6 391.684 
2,5-dimethylhexane 25M6 382.253 
2,3-dimethylhexane 24M6 382.579 
2,3-dimethylhexane 23M6 388.757 
3,4-dimethylhexane 34M6 390.875 
3-ethyl-2-methylpentane 3Et2M5 388.800 
2,2-dimethylhexane 22M6 379.990 
3,3-dimethylhexane 33M6 385.119 
3-ethyl-3-methylpentane 3Et3M5 391.409 
2,3,4-trimethylpentane 234M5 386.617 
2,2,4-trimethylpentane 224M5 372.388 
2,2,3-trimethylpentane 223M5 382.990 
2,3,3-trimethylpentane 233M5 387.910 
2,2,3,3-tetramethylbutane 2233M4 379.620 
 
X. H. Li, Chem. Phys. Lett. 2002, 365, 135–139.