A Critical Review of Equilibrium Data for Proton- and Metal Complexes of 1,10-Phenanthroline, 2,2'-Bipyridyl and Related Compounds

A Critical Review of Equilibrium Data for Proton- and Metal Complexes of 1,10-Phenanthroline, 2,2'-Bipyridyl and Related Compounds is a compilation of acidity constants for the 1,10-phenanthrolinium and 2,2'-bipyridinium ions and their derivatives, as well as stability constants for metal complexes formed by the conjugate bases of these. These equilibrium data are critically examined.
This monograph includes values determined in non-aqueous or mixed solvents, as well as those for a large number of ""mixed"" metal complexes incorporating these bases and a second ligand. The survey also contains known values for the enthalpies and entropies of formation for the proton- and metal-ion complexes. The compilation indicates the conditions under which the equilibrium constants apply and the methods by which they were determined. The acid-base properties of the compounds are represented by the acidity constant of the phenanthrolinium or bipyridinium ion expressed as a pK value. Nearly all the values listed were obtained either potentiometrically or spectrophotometrically, both of which depend fundamentally on measurements of pH or hydrogen-ion concentration. This book will be of value to chemists.

Introduction

Acidity Constants

Stability Constants of Metal Complexes

Mixed Complexes

Other Ternary or Higher Complexes

Enthalpies and Entropies of Formation

Table I.1 Acidity Constants for the Phenanthrolinium Ion

Table I.2 Acidity Constants for the Bipyridinium Ion

Table I.3 Acidity Constants for Substituted Phenanthrolinium Ion

Table I.4 Acidity Constants for Substituted Bipyridinium Ion

Table I.5 Second Stage Protonation of Phenanthroline and Bipyridyl

Table II.1 Stability Constants of Metal Complexes (Single Ligand), 1,10-Phenanthroline

Table II.2 Stability Constants of Metal Complexes (Single Ligand), 2,2'-Bipyridyl

Table II.3 Stability Constants of Metal Complexes (Single Ligand), Substituted Phenanthrolines

Table II.4 Stability Constants of Metal Complexes (Single Ligand), Substituted Bipyridyls

Table III.1 Acidity Constants of Phenanthrolines, Mixed or Non-Aqueous Solvents

Table III.2 Acidity Constants of Bipyridyls, Mixed or Non-Aqueous Solvents

Table III.3 Stability Constants of Phenanthroline Metal Complexes (Mixed or Non-Aqueous Solvents)

Table III.4 Stability Constants of Bipyridyl Metal Complexes (Mixed or Non-Aqueous Solvents)

Table IV.1 Equilibrium Constants of Mixed Complexes with 1,10-Phenanthroline

Table IV.2 Equilibrium Constants of Mixed Complexes with 2,2'-Bipyridyl

Table V.1 Equilibrium Constants for Complex Adducts, etc. with 1,10-Phenanthroline

Table V.2 Equilibrium Constants of Complex Adducts, etc. with 2,2'-Bipyridyl

Table VI.1 Enthalpies and Entropies of Complex Formation, 1,10-Phenanthroline

Table VI.2 Enthalpies and Entropies of Complex Formation, 2,2'-Bipyridyl

Table VI.3 Enthalpies and Entropies of Complex Formation, Substituted Phenanthrolines

Table VI.4 Enthalpies and Entropies of Complex Formation, Substituted Bipyridyls