仲丁基（sec-butyl group），又称第二丁基或二级丁基。丁烷分子中任何一个甲叉基(二级碳原子，CH2=)上去掉一个氢原子后，剩下的一价基团。

Butan-2-yl (sec-butyl) group is chiral. The carbon atom at position 2 is a stereocenter . It has four different groups attached: −H , −CH 3 , −CH 2 −CH 3 , and −R (the R group is not equal to those three groups).

Secondary (Sec) With butyl straight-chain alkyl groups there is the possibility of a connection on the second carbon from the end of the chain. These alkyl groups are given the prefix "Sec." This is not used for pentyl or hexyl groups because there is more than one structure that are not identical that could be named as sec-pentyl or sec-hexyl.

sec-Butyl acetate, or s-butyl acetate, is an ester commonly used as a solvent in lacquers and enamels, where it is used in the production of acyclic polymers, vinyl resins, and nitrocellulose. [3] It is a clear flammable liquid with a sweet smell.

Sec-butyl (sec-butyl group): A portion of molecular structure equivalent to butane minus one hydrogen atom from carbon 2.

A Sec-Butyl Group is defined as a steric hindrance group that can be attached to a molecule, providing increased steric bulk and influencing the reactivity and selectivity of chemical reactions. AI generated definition based on: Comprehensive Organic Synthesis (Second Edition), 2014

The sec-butyl group is a branched alkyl substituent with a methyl group attached to the second carbon of a four-carbon chain. It is a structural isomer of the primary butyl group, where the substituent is attached to the terminal carbon.

Isobutyl vs. Sec-butyl What's the Difference? Isobutyl and sec-butyl are both alkyl groups that differ in their branching structure. Isobutyl has a branched structure with a methyl group attached to the second carbon atom, while sec-butyl has a straight chain structure with a methyl group attached to the second carbon atom.

2020年1月2日 · The butyl functional group can have four different conformations: n-butyl, s-butyl, t-butyl, and isobutyl. This article helps name the different forms.

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