(1,4,8,11‐Tetraazacyclotetradecane)Nickel(II) Perchlorate and 1,4,8,11‐Tetraazacyclotetradecane

Abstract

A large number of complexes of tetraaza macrocyclic ligands is known. These ligands have from 12 to 16 atoms in the ring, and the most common structure is a 14-membered ring. The simplest of the ligands is 1,4,8,1 l-tetraazacyclotetradecane :A variety of metal complexes of this ligand have been prepared, including the metals C O ,~ Ni,2 and Rh.3 Coordination is generally in a planar fashion, although cis coordination to CO(III)~ has been reported. These complexes were first prepared by direct interaction of the ligand with the metal salt. Unfortunately, this ligand, unlike others of its class,5 has previously been available only through laborious organic syntheses.V Recently an in situ preparation of the nickel(I1) complex was reported.7 The ligand can easily be removed from the nickel(I1) and used in the preparation of other metal complexes.Given here is an improved version of this in situ synthesis which provides high yields of the nickel(I1) perchlorate complex. Procedures for removing the ligand from the metal and for its purification are also given.

Electrocatalytic Oxidation of Amines by Ni­(1,4,8,11‐tetraazacyclotetradecane)2+ Entrapped in Sol–Gel Electrodes

“…The ligand, L = 1,4,8,11-tetraazacyclotetradecane, and the complex, Ni II L(Cl 2 ) 2 , were synthesized by a previously reported method. [25] This complex was transformed into Ni II L(PF 6 ) 2 by adding an equivalent amount of AgPF 6 and recrystallizing.…”

Multifunctional Fourfold Interpenetrating Diamondoid Network: Gas Separation and Fabrication of Palladium Nanoparticles

“…MTB [41] and [42] were prepared according to the methods previously reported. Infrared spectra were recorded with a Perkin-Elmer Spectrum One FT-IR spectrophotometer.…”

Living in a Cage Is a Restricted Privilege

“…6, takes place in water, open air, at room temperature. The Ni 2+ ion, on coordination of the linear tetramine 3.2.3-tet (3), places the two primary amine groups in the positions (the adjacent corners of a square) [12,13]. This was the natural evolution of the pioneering work on the template synthesis of tetra-aza macrocycles carried out by Busch and Curtis during the preceding decade [14,15].…”