Composed of 2 isoprene units
MONOTERPENES
Molecular formula
C10H16
They can occur in____ forms as hydrocarbons
acyclic, monocyclic, and bicyclic,
as oxygenated derivatives such as
alcohols, aldehydes, ketones, phenols, oxides and esters.
TYPES OF MONOTERPENES
acyclic (linear) monoterpenes
monocyclic monoterpenes -
bicyclic monoterpenes
mercenes, geraniol, citral, citronellal, citronellol, linalool, halomon
acyclic (linear) monoterpenes- ex:
p- cymene, menthol, thymol, carvacrol
monocyclic monoterpenes - ex:
pinene, carene, sabinene, camphene, thujone, camphor, borneo, eucalyptol
bicyclic monoterpenes - ex
a class of terpenes that consist of 3 isoprene units
SESQUITERPENES
molecular formula
C15H24
SESQUITERPENES
1. acyclic - ex:
farnesene
monocyclic - ex:
zingiberene, humulene
bicyclic - ex:
cardinenes, caryophyllene
tricyclic - ex:
longifolene, copaene, patchoulol
these are compounds that consists of 1 or more rings that contains alternating single and double bonds in its chemical structure
AROMATIC COMPOUNDS
another major group of volatile oil constituents
PHENYLPROPANOID
they contain the C6 phenyl ring with an attached C3 propane side chain
PHENYLPROPANOID
PHENYLPROPANOID ex.
phenols, phenol ethers