Related Experiment Video
Updated: Jun 26, 2026

Preparation of Stable Bicyclic Aziridinium Ions and Their Ring-Opening for the Synthesis of Azaheterocycles
Published on: August 22, 2018
Diversity of azido magnetic chains constructed with flexible ligand 2,2'-dipyridylamine
Xiu-Teng Wang1, Xiao-Hua Wang, Zhe-Ming Wang
1Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China.
Abstract:
By employing a flexible molecule, 2,2'-dipyridylamine (dpa), as a bidentate coligand, three azide-bridged one-dimensional coordination polymers, [M(dpa)(N(3))(2)](n) (M = Cu, 1.Cu; Co, 2.Co) and [Ni(dpa)(OAc)(0.5)(N(3))(1.5)(H(2)O)](n) (3.Ni), have been successfully synthesized and structurally and magnetically characterized. They show versatile one-dimensional chain structures. 1.Cu is an EO-N(3) bridged uniform chain; 2.Co is an alternative chain linked by two EO-N(3) and two EE-N(3) bridges. Interestingly, 3.Ni is a zigzag chain linked alternatively by one EE-N(3) and a novel 3-fold bridge, which is composed of two EO-N(3) and one acetate group. This series of azido complexes demonstrates that the flexibility of the dpa ligand plays an important role in directing the structures of the final products. Magnetic studies reveal dominant intrachain antiferromagnetic couplings in compound 1.Cu. Compounds 2.Co and 3.Ni are weak ferromagnets due to the spin canting, with critical temperatures of 12.4 and 32.5 K, respectively.
More Related Videos
09:22Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
Published on: February 7, 2017
07:20Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents
Published on: May 28, 2014
Related Concept Videos
Aryldiazonium Salts to Azo Dyes: Diazo Coupling
Preparation of 1° Amines: Azide Synthesis
Azide ions act as good nucleophiles and react with unhindered alkyl halides to form alkyl azides. Alkyl azides do not participate in further nucleophilic substitution reactions, thereby eliminating the chances of polyalkylated products. Alkyl azides are reduced by hydride-based reducing agents, like lithium aluminum...
EDTA: Chemistry and Properties
Valence Bond Theory
Structure of Amines
Structural Isomerism
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...