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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.
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.
This page contains tables of azeotrope data for various binary and ternary mixtures of solvents. The data include the composition of a mixture by weight (in binary azeotropes, when only one fraction is given, it is the fraction of the second component), the boiling point (b.p.) of a component, the boiling point of a mixture, and the specific gravity of the mixture.
Coefficients for partition between water and solvents wet/dry solvent c e s a b v source w 1-butanol: 0.376 0.434 -0.718 -0.097 -2.350 2.682 [1]w
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
[3] [4] The average C-N-C angle was claimed to be 119.2°, [2] much closer to the 120° of the flat configuration than to the 111.8° of trimethylamine. This peculiarity was attributed to steric hindrance by the bulky isopropyl radicals.
Isopropylamine can be obtained by reaction of isopropyl alcohol with ammonia in presence of a catalyst: [3] (CH 3) 2 CHOH + NH 3 → (CH 3) 2 CHNH 2 + H 2 O. Isopropylamine is a building block for the preparation of many herbicides and pesticides including atrazine, bentazon, glyphosate, imazapyr, ametryne, desmetryn, prometryn, pramitol, dipropetryn, propazine, fenamiphos, and iprodione. [3]
Diisopropanolamine is a chemical compound with the molecular formula C 6 H 15 NO 2, used as an emulsifier, stabilizer, and chemical intermediate. [2] Diisopropanolamine can be prepared by the reaction of isopropanolamine or ammonia with propylene oxide. [3] Synthesis of diisopropanolamine from isopropanolamine