A carbomer in organic chemistry is an expanded molecule obtained by insertion of a C2 unit in a given molecule [1]. Carbomers differ from their templates only in size but not in symmetry or energy when each C-C single bond is replaced by at least one alkyne bond and when a double bond is replaced by an allene bond. The size of the carbomer will continue to increase when more alkyne bonds are introduced and for this reason carbomers are also called carbon-molecules with n the number of acetylene or allene groups in a n expansion unit.
Two representations exist for carbo-benzene, one with the aromatic core of benzene expanded and one with the hydrogen substituents expanded.
This concept, devised by Remi Chauvin in 1995 is aimed at introducing new chemical properties for existing chemical motives.
Other Carbomer meanings
Carbomer is also a tradename for a synthetic polymer of acrylic acid. Carbomers are used as emulsion stabilizers or thickening agents in cosmetic products. They may be homopolymers of acrylic acid, crosslinked with an allyl ether pentaerythritol, allyl ether of sucrose, or allyl ether of propylene.
External links
- www.dermaxime.com Link
References
- ^ Carbomers. I. A general concept of expanded molecules Remi Chauvin Tetrahedron Letters Volume 36, Issue 3 , 16 January 1995, Pages 397-400 doi:10.1016/0040-4039(94)02275-G