Related Experiment Video
Updated: Feb 16, 2026

Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
Crystal structures of N,N-dimethyl-(2-(2,2-diphen-yl)-2-prop-2-yn-yloxy)acet-oxy)ethyl-amine and
Mohammed A E Shaibah1, Hemmige S Yathirajan1, S Madan Kumar2
1Department of Studies in Chemistry, University of Mysore, Manasagangotri, Mysuru 570 006, India.
Abstract:
The N,N-di-methyl-ethylamminium unit in N,N-dimethyl-[2-(2,2-diphen-yl)-2-prop-2-ynyloxyacet-oxy]ethyl-amine, C21H23NO3 (I), is disordered over two sets of atomic sites having occupancies of 0.880 (3) and 0. 120 (3), but there are no direction-specific inter-actions between the mol-ecules of (I). The cation in N,N-dimethyl-[2-(2,2-diphen-yl)-2-prop-2-ynyloxyacet-oxy]ethyl-ammonium 2,4,6-tri-nitro-phenolate (picrate), C21H24NO3+·C6H2N3O7- (II), shows a similar type of disorder, with occupancies of 0.654 (11) and 0.346 (11), although the overall conformation of the cation in (II) is different from that in the neutral (I). The component ions are are linked by an almost planar three-centre N-H⋯(O)2 hydrogen bond, and the ion pairs are further linked by a combination of three C-H⋯O hydrogen bonds to form sheets. Comparisons are made with some related structures.
Related Concept Videos
Structure of Amines
Structures of Carboxylic Acid Derivatives
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the unhybridized p...
2° Amines to N-Nitrosamines: Reaction with NaNO2
Nomenclature of Carboxylic Acid Derivatives: Amides and Nitriles
The IUPAC and common names of amides are derived from the parent carboxylic acid, by replacing the suffix “oic acid” and “ic acid,” respectively, with “amide.” In the following example, the IUPAC name ethanamide is derived from ethanoic acid, and the common name, acetamide, is obtained from acetic acid.
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...
Nomenclature of Secondary and Tertiary Amines

