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In organic chemistry and biochemistry, the symbol R denotes a side chain. (The symbol in fact stands for radical.) This is useful when you wish to write a single formula to denote a number of different compounds with a certain structure in common.
Example
All the amino acids that are encoded by DNA have this component: -CH(NH2).CO2H
A convenient way to write the formula for all these amino acids is:
R-CH(NH2).CO2H
where
R = hydrogen (H-) in the amino acid glycine
R = a methyl group (CH3-) in alanine
and so on.
Wiki User
∙ 15y ago
Wiki User
∙ 11y agoIn organic chemistry R means hydrocarbon Alkyl group, such as methly, ethyl, propyl, butyl, (straight or branched chains) or possibly rings such as cycloalkyl, In physical chemistry "R" means Gas constant .
Wiki User
∙ 11y agoFor chemists, the R / S system is the most important nomenclature system for denoting enantiomers, which does not involve a reference molecule such as glyceraldehyde. It labels each chiral center R or S according to a system by which its substituents are each assigned a priority, according to the Cahn-Ingold-Prelog priority rules (CIP), based on atomic number. If the center is oriented so that the lowest-priority of the four is pointed away from a viewer, the viewer will then see two possibilities: If the priority of the remaining three substituents decreases in clockwise direction, it is labeled R (for Rectus, Latin for right), if it decreases in counterclockwise direction, it is S (for Sinister, Latin for left).
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What is R-CHO in chemistry?
An aldehyde
What does the subscript r stand for in chemistry qr?
reaction
Is it ether or aether?
In Organic Chemistry an oxygen containing compound such as R-O-R' is known Ether.
Why did Richard R. Schrock win The Nobel Prize in Chemistry in 2005?
The Nobel Prize in Chemistry 2005 was awarded jointly to Yves Chauvin, Robert H. Grubbs and Richard R. Schrock for the development of the metathesis method in organic synthesis.
Who was the winner of noble prize in chemistry in 2005?
It is shared by Yves Chauvin, Robert H. Grubbs and Richard R. Schrock.
What has the author R A Witthaus written?
R. A. Witthaus has written: 'Essentials of chemistry' -- subject(s): Organic Chemistry, Chemistry, Pharmaceutical chemistry
What is R O R in chemistry?
Ether
What has the author William R Robinson written?
William R. Robinson has written: 'Chemistry' -- subject(s): Chemistry 'General chemistry with qualitative analysis' -- subject(s): Analytic Chemistry, Chemistry, Chemistry, Analytic, Qualitative
What has the author John R Amend written?
John R. Amend has written: 'General, organic, and biological chemistry' -- subject(s): Biochemistry, Chemistry, Chemistry, Organic, Organic Chemistry
What has the author R Nelson Smith written?
R. Nelson Smith has written: 'Chemistry; a quantitative approach' -- subject(s): Analytic Chemistry, Chemistry, Quantitative
What is R-O-R in chemistry?
R-O-R' is the general structure for an ether.
What has the author R T Sanderson written?
R. T. Sanderson has written: 'Inorganic chemistry' -- subject(s): Inorganic Chemistry 'Teaching chemistry with models' 'Simple inorganic substances' -- subject(s): Inorganic Chemistry 'Fundamentals of modern chemistry' -- subject(s): Chemistry
What has the author Stephen R Byrn written?
Stephen R. Byrn has written: 'Solid state chemistry of drugs' -- subject(s): Pharmaceutical chemistry, Solid state chemistry
What has the author R J W Cremlyn written?
R. J. W. Cremlyn has written: 'A college organic chemistry' -- subject(s): Chemistry, Organic, Organic Chemistry
What is R-CHO in chemistry?
An aldehyde
What does R-134A stand for?
In chemistry, this chemical compound, R-134A is the symbol for tetrafluoroethane. Tetrafluoroethane can be used as a solvent in organic chemistry.
What has the author Paul R Loconto written?
Paul R. Loconto has written: 'Trace environmental quantitative analysis' -- subject(s): Analytic Chemistry, Chemistry, Analytic, Environmental chemistry, Quantitative, Trace analysis
