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N,N-Diisopropylethylamine, or Hünig's base, is an organic compound that is a tertiary amine. It is named after the German chemist Siegfried Hünig . It is used in organic chemistry as a non-nucleophilic base. It is commonly abbreviated as DIPEA, DIEA, or i-Pr 2 NEt.
As a result of these and other synthetic difficulties, the authors of a 2018 study predict that the even more crowded tri-tert-butylamine (t Bu 3 N, unknown as of 2023) will likely remain a longstanding unsolved synthetic challenge, even though ab initio calculations indicate that it would be of reasonable stability if it could be prepared. [7]
It is also used to prepare N,N-diisopropylethylamine (Hünig's base) by alkylation with diethyl sulfate. [8] The bromide salt of diisopropylamine, diisopropylammonium bromide, is a room-temperature organic ferroelectric material. [9]
A variety of amines and nitrogen heterocycles are useful bases of moderate strength (pK a of conjugate acid around 10-13) . N,N-Diisopropylethylamine (DIPEA, also called Hünig's Base [1]), pK a = 10.75
The molecular formula C 8 H 19 N (molar mass: ... N,N-Diisopropylethylamine, or Hünig's base; Octodrine; Oenethyl This page was last edited on 17 January 2025, at 01 ...
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Another non-nucleophilic base is N,N-diisopropylethylamine. Its aqueous p K aH (conjugate acid dissociation constant, a measure of basicity) is 11.07 at 25 °C, [ 1 ] while its p K a (acid dissociation constant, a measure of acidity) is approximately 37.