s. Together with 2-butyne and diphenylacetylene , it serves as a reference acetylenic ligand in organometallic chemistry . 3-Hexyne is useful because the 1 H NMR signals for the methylene groups convey stereochemical information in its octahedral complexes . Read more... Edit at Wikipedia... Other names 3-Hexyne (IUPAC Name); Diethylacetylene References