Tripropylene

Tripropylene
Identifiers
CAS Number	13987-01-4 ; 4,6-Dimethyl-1-heptene:: 7379-69-3;
3D model ( JSmol)	4,6-Dimethyl-1-heptene:: Interactive image;
ChemSpider	4,6-Dimethyl-1-heptene:: 10618997;
PubChem CID	4,6-Dimethyl-1-heptene:: 13437467;
UN number	2057
CompTox Dashboard (EPA)	DTXSID50540820 ;
	InChI 4,6-Dimethyl-1-heptene:: InChI=1S/C9H18/c1-5-6-9(4)7-8(2)3/h5,8-9H,1,6-7H2,2-4H3 Key: FSWNZCWHTXTQBY-UHFFFAOYSA-N;
	SMILES 4,6-Dimethyl-1-heptene:: CC(C)CC(C)CC=C;
Properties
Chemical formula	C9H18
Molar mass	126.24 g/mol
Appearance	colourless liquid
Density	1.022 g/mL
Melting point	−93.5 °C (−136.3 °F; 179.7 K)
Boiling point	156 °C (313 °F; 429 K)
Solubility in water	very low
Hazards
Flash point	23 °C (73 °F; 296 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Tripropylene, also known as propylene trimer, is usually sold as a mixture of

propene

:

3 C₃H₆ → C₉H₁₈

In this process, two double bonds are lost and one is retained as illustrated by the isomer shown in the figure. The reaction is catalyzed by acids, such as

polyphosphoric acid.^[3] A variety of catalysts have been explored.^[4]

The reaction proceeds via the formation of a carbocation ((CH₃)₂CH⁺), which attacks another propylene unit, generating a new carbocation, etc. This kind of process affords mixtures (C₃H₆)_n.

Like other

alkylating agent. A number of surfactants and lubricants

are produced by alkylation of aromatic substrates.