Undecane

The Undecane are a group of substances from the group of alkanes . It consists of 159 isomeric compounds with the empirical formula C ₁₁ H ₂₄ .

The linear representative is the n -undecane .

The following table gives an overview of all constitutionally isomeric undecanes, grouped according to the number of carbon atoms in the main chain or according to the substituents:

Substituents	Number of carbon atoms in the main chain
	11	10	9	8th	7th	6th	5
---	n -Undecane
methyl		2-methyldecane 3-methyldecane 4-methyldecane 5-methyldecane	2,2-dimethylnonane 2,3-dimethylnonane 2,4-dimethylnonane 2,5-dimethylnonane 2,6-dimethylnonane 2,7-dimethylnonane 2,8-dimethylnonane 3,3-dimethylnonane 3,4-dimethylnonane 3,5-dimethylnonane 3,6-dimethylnonane 3,7-dimethylnonane 4,4-dimethylnonane 4,5-dimethylnonane 4,6-dimethylnonane 5,5-dimethylnonane	2,2,3-trimethyloctane 2,2,4-trimethyloctane 2,2,5-trimethyloctane 2,2,6-trimethyloctane 2,2,7-trimethyloctane 2,3,3-trimethyloctane 2,3,4-trimethyloctane 2 , 3,5-trimethyloctane 2,3,6-trimethyloctane 2,3,7-trimethyloctane 2,4,4-trimethyloctane 2,4,5-trimethyloctane 2,4,6-trimethyloctane 2,4,7-trimethyloctane 2, 5,5-trimethyloctane 2,5,6-trimethyloctane 2,6,6-trimethyloctane 3,3,4-trimethyloctane 3,3,5-trimethyloctane 3,3,6-trimethyloctane 3,4,4-trimethyloctane 3,4 , 5-trimethyloctane 3,4,6-trimethyloctane 3,5,5-trimethyloctane 4,4,5-trimethyloctane	2,2,3,3-tetramethylheptane 2,2,3,4-tetramethylheptane 2,2,3,5-tetramethylheptane 2,2,3,6-tetramethylheptane 2,2,4,4-tetramethylheptane 2,2,4 , 5-tetramethylheptane 2,2,4,6-tetramethylheptane 2,2,5,5-tetramethylheptane 2,2,5,6-tetramethylheptane 2,2,6,6-tetramethylheptane 2,3,3,4-tetramethylheptane 2 , 3,3,5-tetramethylheptane 2,3,3,6-tetramethylheptane 2,3,4,4-tetramethylheptane 2,3,4,5-tetramethylheptane 2,3,4,6-tetramethylheptane 2,3,5, 5-tetramethylheptane 2,3,5,6-tetramethylheptane 2,4,4,5-tetramethylheptane 2,4,4,6-tetramethylheptane 2,4,5,5-tetramethylheptane 3,3,4,4-tetramethylheptane 3, 3,4,5-tetramethylheptane 3,3,5,5-tetramethylheptane 3,4,4,5-tetramethylheptane	2,2,3,3,4-pentamethylhexane 2,2,3,3,5-pentamethylhexane 2,2,3,4,4-pentamethylhexane 2,2,3,4,5-pentamethylhexane 2,2,3, 5,5-pentamethylhexane 2,2,4,4,5-pentamethylhexane 2,3,3,4,4-pentamethylhexane 2,3,3,4,5-pentamethylhexane	2,2,3,3,4,4- hexamethylpentane
Ethyl			3-ethylnonane 4-ethylnonane 5-ethylnonane		3,3-diethylheptane 3,4-diethylheptane 3,5-diethylheptane 4,4-diethylheptane
Ethyl and methyl				3-ethyl-2-methyloctane 3-ethyl-3-methyloctane 3-ethyl-4-methyloctane 3-ethyl-5-methyloctane 3-ethyl-6-methyloctane 4-ethyl-2-methyloctane 4-ethyl-3-methyloctane 4 -Ethyl-4-methyloctane 4-ethyl-5-methyloctane 5-ethyl-2-methyloctane 5-ethyl-3-methyloctane 6-ethyl-2-methyloctane	3-ethyl-2,2-dimethylheptane 3-ethyl-2,3-dimethylheptane 3-ethyl-2,4-dimethylheptane 3-ethyl-2,5-dimethylheptane 3-ethyl-2,6-dimethylheptane 3-ethyl-3 , 4-dimethylheptane 3-ethyl-3,5-dimethylheptane 3-ethyl-4,4-dimethylheptane 3-ethyl-4,5-dimethylheptane 4-ethyl-2,2-dimethylheptane 4-ethyl-2,3-dimethylheptane 4 -Ethyl-2,4-dimethylheptane 4-ethyl-2,5-dimethylheptane 4-ethyl-2,6-dimethylheptane 4-ethyl-3,3-dimethylheptane 4-ethyl-3,4-dimethylheptane 4-ethyl-3, 5-dimethylheptane 5-ethyl-2,2-dimethylheptane 5-ethyl-2,3-dimethylheptane 5-ethyl-2,4-dimethylheptane 5-ethyl-2,5-dimethylheptane 5-ethyl-3,3-dimethylheptane	3-ethyl-2,2,3-trimethylhexane 3-ethyl-2,2,4-trimethylhexane 3-ethyl-2,2,5-trimethylhexane 3-ethyl-2,3,4-trimethylhexane 3-ethyl-2, 3,5-trimethylhexane 3-ethyl-2,4,4-trimethylhexane 3-ethyl-2,4,5-trimethylhexane 3-ethyl-3,4,4-trimethylhexane 4-ethyl-2,2,3-trimethylhexane 4 -Ethyl-2,2,4-trimethylhexane 4-ethyl-2,2,5-trimethylhexane 4-ethyl-2,3,3-trimethylhexane 4-ethyl-2,3,4-trimethylhexane 3,3-diethyl-2 -methylhexane 3,3-diethyl-4-methylhexane 3,4-diethyl-2-methylhexane 3,4-diethyl-3-methylhexane 4,4-diethyl-2-methylhexane	3-ethyl-2,2,3,4-tetramethylpentane 3-ethyl-2,2,4,4-tetramethylpentane 3,3-diethyl-2,2-dimethylpentane 3,3-diethyl-2,4-dimethylpentane
Propyl				4-propyloctane
1-methylethyl (= isopropyl)				4- (1-methylethyl) octane
Methyl and 1-methylethyl (= isopropyl)					2-methyl-3- (1-methylethyl) heptane, 2-methyl-4- (1-methylethyl) heptane, 3-methyl-4- (1-methylethyl) heptane, 4-methyl-4- (1-methylethyl) heptane	2,2-dimethyl-3- (1-methylethyl) hexane 2,3-dimethyl-3- (1-methylethyl) hexane 2,4-dimethyl-3- (1-methylethyl) hexane 2,5-dimethyl-3- (1-methylethyl) hexane	2,2,4-trimethyl-3- (1-methylethyl) pentane 2,3,4-trimethyl-3- (1-methylethyl) pentane
Methyl and propyl					2-methyl-4-propylheptane, 3-methyl-4-propylheptane, 4-methyl-4-propylheptane
Butyl					4- tert -butylheptane

use

The isomers of undecane are used in the separation of alkylphenols by means of azeotropic rectification , in which the isomers are used as entrainers .

Individual evidence

1. ↑ Dieter Wolber: Chemistry is not that difficult ...: Basics . BoD - Books on Demand, 2014, p. 476 ( limited preview in Google Book search).
2. ↑ slywalaate: Constitutional isomer of Alkanes. In: Scribd. Retrieved on August 26, 2017 . 
3. ↑ Patent US4349419 : Process for separation of alkyl phenols by azeotropic distillation. Published September 14, 1982 , Inventors: Kazunori Takahata, Katsuo Taniguchi, Tadaaki Fujimoto. ‌