Tripropylene

Tripropylene, also known as propylene trimer, is usually sold as a mixture of structural isomers of nonene.^[2] This mixture is obtained by oligomerization of propene:

3 C₃H₆ → C₉H₁₈

Tripropylene

Identifiers
CAS Number	13987-01-4 Y 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[1] °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). Y verify (what is YN ?) Infobox references

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 alkenes, propylene trimer is used as an alkylating agent. A number of surfactants and lubricants are produced by alkylation of aromatic substrates.

See also

• 1-Nonene - the linear analogue