Hydriodic acid reduces it to hexamethylene" (cyclo-hexane or hexa-hydro-benzene); chlorine and bromine form substitution and addition products, but the action is slow unless some carrier such as iodine, molybdenum chloride or ferric chloride for chlorine, and aluminium bromide for bromine, be present.
Similarly, pentane, C 5 H 12, and hexane, C6H14, may exist in three and five theoretically isomeric forms respectively; confirmation of this theory is supplied by the fact that all these compounds have been obtained, but no more.
The third most valuable indication which molecular structure gives about these isomers is how to prepare them, for instance, that normal hexane, represented by CH 3 CH 2 CH 2 CH 2 CH 2 CH3, may be obtained by action of sodium on propyl iodide, CH 3 CH 2 CH 2 I, the atoms of iodine being removed from two molecules of propyl iodide, with the resulting fusion.
POLYMETHYLENES, in chemistry, cyclic compounds, the simplest members of which are saturated hydrocarbons of general formula C 7, H 2nj where n may be r to 9, and known as tri-, tetra-, penta-, hexa-, and hepta-methylene, &c., or cyclo- propane, -butane, -pentane, -hexane, -heptane, &c.: - CH 21 CH 2 CH 2 CH2.CH2 CH2 CH2 CH2?C1H,, I I H ?
Blanc (Comptes rendus, 1903, 136, p. 1460), prepared hydrocarbons of the cyclo-pentane series from cyclo- hexane compounds by the exhaustive methylation process of A.
Stobbe, Ann., 1901, 314, p. III; 315, p. 219 seq.; 1903, 326, p. 347 Cyclo-hexane Group. Hydrocarbons.
- Cyclo-hexane, or hexahydro benzene, C 6 H 121 is obtained by the action of sodium on a boiling alcoholic solution of I.
Hexahydrocymene (methyl-i-isopropyl-4-cyclo-hexane), C10H20, is important since it is the parent substance of many terpenes (q.v.).
Baeyer by removing the elements of hydriodic acid from iodocyclo-hexane on boiling it with quinoline.
4 dibrom-cyclo-hexane with quinoline.
Inosite (cyclo-hexane-hexol), C 6 H 6 (OH) 6.
Cyclo-hexane-dione-i 3 (dihydroresorcin), C 6 H 8 O 2, was obtained by G.
Triquinoyl (hexaketo-cyclo-hexane) C 6 0 6.8H 2 O, is formed on oxidizing rhodizonic acid or hexa-oxybenzene.
Hexahydroisophthalic acids (cyclo-hexane-i.
Hexahydroterephthalic acids (cyclo-hexane-I.
The Hydrobromide A' acid results on boiling the A 2 acid on reduction with alkalis, or on eliminating hydroHEXAHYDRO bromic acid from i-brom-cyclo-hexane carboxylic acid-I.
The A 3 acid is Sodium obtained by eliminating the elements of amalgam water from 4-oxy-cyclo-hexane-i-carb- p1.4 Dihydro oxylic acid (W.