Refractive Index of Common Alkynes
The refractive index of alkynes generally falls within the range of 1.35 to 1.50, depending on factors such as molecular structure, substitution, and the wavelength of light being considered.
The following table provides a curated list of refractive index values for different alkynes measured at wavelength (λ) of 589 nm.
| Temperature | ||
|---|---|---|
| Acetylene (C2H2) | 20 | 1.00061 |
| Propyne (C3H4) | -40 | 1.3863 |
| 1-Butyne (C4H6) | 20 | 1.3962 |
| 1-Pentyne (C5H8) | 25 | 1.3822 |
| 1-Hexyne (C6H10) | 25 | 1.3957 |
| 1-Heptyne (C7H12) | 25 | 1.4060 |
| 1-Octyne (C8H14) | 25 | 1.4138 |
| 1-Nonyne (C9H16) | 25 | 1.4195 |
| 1-Decyne (C10H18) | 25 | 1.4249 |
| 1-Undecyne (C11H20) | 25 | 1.4292 |
| 1-Dodecyne (C12H22) | 25 | 1.4328 |
| 1-Tridecyne (C13H24) | 25 | 1.4359 |
| 1-Tetradecyne (C14H26) | 25 | 1.4387 |
| 1-Pentadecyne (C15H28) | 25 | 1.4410 |
| 1-Hexadecyne (C16H30) | 25 | 1.4430 |
| 1-Heptadecyne (C17H32) | 25 | 1.4410 |
| 1-Octadecyne (C18H34) | 25 | 1.4774 |
| 1-Nonadecyne (C19H36) | 20 | 1.4488 |
| 1-Eicosyne (C20H38) | 20 | 1.4501 |
| 1-Heneicosyne (C21H40) | 25 | 1.4542 |
| 1-Docosyne (C22H42) | 25 | 1.4566 |
| 1-Tricosyne (C23H44) | 25 | 1.4590 |
| 1-Tetracosyne (C24H46) | 25 | 1.4613 |
| 1-Pentacosyne (C25H48) | 25 | 1.4633 |
| 1-Hexacosyne (C26H50) | 25 | 1.4653 |
| 1-Heptacosyne (C27H52) | 25 | 1.4673 |
| 1-Octacosyne (C28H54) | 25 | 1.4692 |
| 1-Nonacosyne (C29H56) | 25 | 1.4710 |
| 1-Triacontyne (C30H58) | 25 | 1.4728 |
| 1-Hentriacontyne (C31H60) | 25 | 1.4747 |
| 1-Dotriacontyne (C32H62) | 25 | 1.4763 |
| 1-Tritriacontyne (C33H64) | 25 | 1.4779 |
| 1-Tetratriacontyne (C34H66) | 25 | 1.4793 |
| 1-Pentatriacontyne (C35H68) | 25 | 1.4810 |
| 1-Hexatriacontyne (C36H70) | 25 | 1.4824 |
| 1-Heptatriacontyne (C37H72) | 25 | 1.4838 |
| 1-Octatriacontyne (C38H74) | 25 | 1.4853 |
| 1-Nonatriacontyne (C39H76) | 25 | 1.4865 |
| 1-Tetracontyne (C40H78) | 25 | 1.4880 |
Related Tables
References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018. 2) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016-2017. 3) Yaws, Carl L. The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals. Netherlands: Elsevier Science, 2015. 4) Occupational Safety and Health Administration (OSHA): The National Institute for Occupational Safety and Health (NIOSH).