chemistry adda

TERPENE AND TERPENOIDS are the natural products or secondary metabolites. These are produced by living organism so belongs to the category of natural products.  Terpenes are hydrocarbon in nature.  While terpenoids are oxygenated hydrocarbon or de - hydrogenated derivative of terpene.  ISOPRENE RULE GIVEN BY- ruzicka and wallach in 1887. According to this rule thermal decomposition of almost all terpene give isoprene as one of product.  Head-branched end of isoprene Tail-unbranched end of isoprene It is a carbon-5 unit.  According to this rule maximum number of terpene are formed by linking of isoprene unit in head to tail linkage.  [1,4 linkage]  But it is not a fixed rule it is just the guiding principle. Has many exceptions like carotenoid, lavandulol.  CLASSIFICATION OF TERPENE Similarly terpenoids can be classified  Properties  They are volatile in nature.  Colourless, non polar, highly flamm...