𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Rapid reactions of phthalocyanines with tellurium tetrachloride in non-aqueous solutions

✍ Scribed by Yutaka Kagaya; Hiroaki Isago

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
86 KB
Volume
03
Category
Article
ISSN
1088-4246

No coin nor oath required. For personal study only.

✦ Synopsis

Rapid reactions of tetra(tert-butyl)phthalocyanine, H ~2~( tbpc ), and its zinc complex, [ Zn ( tbpc )], with tellurium tetrachloride ( TeCl ~4~) in non-aqueous solutions have been investigated. Upon mixing respective solutions containing the reactants, drastic spectral changes occurred in chloroform and toluene even at room temperature. The electronic spectra of the products indicated that the reactions involved an acid-base equilibrium where the phthalocyanines and tellurium tetrachloride acted as a Lewis base and a Lewis acid respectively. By monitoring the spectral changes based on various initial molar ratios of the reactants, the compositions of the products for each system have been determined. [ Zn ( tbpc )] formed a 1:1 ( tbpc : TeCl ~4~) adduct in both chloroform and toluene, showing the same spectra close to those of the known monoprotonated phthalocyanines. On the other hand, H ~2~( tbpc ) formed a 1:1 adduct in chloroform but a 1:3 adduct in toluene even though both products showed essentially the same spectra close to those of the known diprotonated phthalocyanines. Equilibrium constants have been calculated for the four systems. Magnetic circular dichroism (MCD) spectra of conjugated acids of phthalocyanines have been studied for the first time.

πŸ“œ SIMILAR VOLUMES

Reactions of 1,Ο‰-bis(2-bromopyridinium)a
Reactions of 1,Ο‰-bis(2-bromopyridinium)alkanes with hydroxide ion in aqueous solutions
✍ Carmen Fernandez; Vicente G. Toscano; Hernan Chaimovich; Mario J. Politi; Noboru πŸ“‚ Article πŸ“… 1998 πŸ› John Wiley and Sons 🌐 English βš– 161 KB

The reaction of OH Γ€ ion with 1,o-bis(2-bromopyridinium)alkanes, where the reaction centers are separated by a varying number of methylene groups, was investigated to model the increased velocity of OH Γ€ attack on premicellar aggregated N-alkylpyridinium compounds. 1,o-Bis(2-bromopyridinium)alkanes

Kinetics and mechanisms of the reactions
Kinetics and mechanisms of the reactions of aluminium(III) with Ξ²-diketones in aqueous solution
✍ Claire T. Tomany; Michael J. Hynes; Thomas Schmid πŸ“‚ Article πŸ“… 1998 πŸ› John Wiley and Sons 🌐 English βš– 162 KB

The kinetics and mechanisms of the reactions of aluminium(III) with pentane-2,4dione (Hpd), 1,1,1-trifluoro pentane-2,4-dione (Htfpd) and heptane-3,5-dione (Hhptd) have been investigated in aqueous solution at and ionic strength sodium per-Οͺ3 25ЊC 0.5 mol dm chlorate. The kinetic data are consistent

Studies on toluidine blue reaction with
Studies on toluidine blue reaction with sulfite in aqueous solution and role of Cu(II) as promoter
✍ S. B. Jonnalagadda; N. R. Gollapalli πŸ“‚ Article πŸ“… 1999 πŸ› John Wiley and Sons 🌐 English βš– 188 KB πŸ‘ 1 views

The kinetic and mechanistic details of the reaction between toluidine blue and sulfite were studied spectrophotometrically by monitoring the depletion of toluidine blue at 633 nm. The reaction had first-order dependence on both the reactants, a stoichiometric ratio of 1:1 and a negative salt effect