The organic compound responsible for the the earthy odour to soil after rain is….. a. Geosmin b. Pruteen c. Tetracycline d. Polysaccharides
Answers
Answer:
Geosmin is an irregular sesquiterpene, produced from the universal sesquiterpene precursor farnesyl pyrophosphate (also known as farnesyl diphosphate), in a two-step Mg2+-dependent reaction.[1] Geosmin, along with the irregular monoterpene 2-methylisoborneol, together account for the majority of biologically-caused taste and odor outbreaks in drinking water worldwide.[2] Geosmin has a distinct earthy or musty odor, which most people can easily smell. The geosmin odor detection threshold in humans is very low, ranging from 0.006 to 0.01 micrograms per liter in water.[2] Geosmin is also responsible for the earthy taste of beetroots and a contributor to the strong scent (petrichor) that occurs in the air when rain falls after a dry spell of weather or when soil is disturbed.[3]
Geosmin
Geosmin
Names
Preferred IUPAC name
(4S,4aS,8aR)-4,8a-Dimethyloctahydronaphthalen-4a(2H)-ol
Other names
(4S,4aS,8aR)-4,8a-Dimethyl-1,2,3,4,5,6,7,8-octahydronaphthalen-4a-ol; 4,8a-Dimethyl-decahydronaphthalen-4a-ol; Octahydro-4,8a-dimethyl-4a(2H)-naphthalenol
Identifiers
CAS Number
19700-21-1 check
3D model (JSmol)
Interactive image
ChEBI
CHEBI:46702 check
ChemSpider
27642 check
ECHA InfoCard
100.039.294 Edit this at Wikidata
PubChem CID
29746
UNII
MYW912WXJ4 check
InChI
InChI=1S/C12H22O/c1-10-6-5-8-11(2)7-3-4-9-12(10,11)13/h10,13H,3-9H2,1-2H3/t10-,11+,12-/m0/s1 check
Key: JLPUXFOGCDVKGO-TUAOUCFPSA-N check
InChI=1/C12H22O/c1-10-6-5-8-11(2)7-3-4-9-12(10,11)13/h10,13H,3-9H2,1-2H3 /t10-,11+,12-/m0/s1
SMILES
O[C@]12[C@H](CCC[C@]2(CCCC1)C)C
Properties
Chemical formula
C12H22O
Molar mass
182.307 g·mol−1
Melting point
78 to 82 °C (172 to 180 °F; 351 to 355 K)
Boiling point
270 to 271 °C (518 to 520 °F; 543 to 544 K)
Hazards
Flash point
104 °C (219 °F; 377 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
In chemical terms, it is a bicyclic alcohol with formula C12H22O, a derivative of decalin. Its name is derived from the Ancient Greek γεω- geō- "earth" and ὀσμή osmḗ "smell". The word was coined in 1965 by the American biochemist Nancy N. Gerber (1929–1985) and the French-American biologist Hubert A. Lechevalier (1926–2015).[4][5]
Production
Effects
See also
References
Further reading
Answer :
option a ). GEOSMIN
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