
What does the letter R represent in chemical structures?
2017年8月4日 · Here, R will be the amino acid's side chain (such as -H for glycine, - $\ce{CH3}$ for alanine, etc.). The R group here essentially says, "and so on, and will differ depending on …
What is R-CH3? - Answers
2025年1月18日 · R-CH3 is an organic composite obtained starting from methane (CH4) and substituting one of the hydrogen atoms with an organic radical, generally indicated with R. …
What is the R-group of Alanine? - Answers
An R group is the chemical group attached to the alpha carbon in an amino acid. In proteins all amino acids have the same basic structure and vary only in their R group. There are 20 …
What amino acid has a methyl group as its R group? - Answers
2024年6月12日 · An R group is the chemical group attached to the alpha carbon in an amino acid. In proteins all amino acids have the same basic structure and vary only in their R group. There …
Why and when is lysine charged - Chemistry Stack Exchange
2015年2月6日 · The alpha amino group is about 99% protonated (+1 charge). The side chain amino group is fully protonated (+1 charge). You need to look at the pK of each ionizable …
Why is +M effect of OH greater than OR?
2024年1月27日 · First of all, you must understand that the reactivity of OR changes as you change the alkyl group (-R). For example, consider, the methoxy group (-OCH 3), as per …
organic chemistry - Reactivity order of electrophilic addition ...
2018年2月26日 · The carbocation position may vary depending upon the $\ce{R}$ group. When the $\ce{R}$ is $\ce{CH3-O}$, there is a positive mesomeric effect (+M or +R effect) of the …
Why are Tyrosine and Tryptophan considered hydrophobic?
2020年8月9日 · All polar amino acids have either an $\ce{OH}$ or $\ce{NH2}$ group (when in aqueous environment), and can therefore make hydrogen bonds with other suitable groups. …
organic chemistry - Why Acid chloride does not react with tertiary ...
2024年8月8日 · This is why acids often donate hydrogen ions - they would never be able to donate R group or Carbon atoms. Linking to this, R groups also form a much stronger bond …
How is the amino group basic? - Chemistry Stack Exchange
2020年4月14日 · One can titrate an amine with an acid, by this experimentally observed fact, exactly just like we titrate NaOH with HCl. So an amine group is indeed a base or say it …