N. S. Poonia
1977
Citations
0
Influential Citations
8
Citations
Journal
Inorganica Chimica Acta
Abstract
The in vitro chemistry of sodium and potassium ions (M) has been investigated using 1,10-phenanthroline (PHEN), water, and organic anion (L) as ligands with the ultimate aim of following these cations in vivo. For L = benzoate (Benz), 2-hydroxybenzoate (Sal), 2-aminobenzoate (Anth), the acid anion of 8-hydroxyquinoline (Quin, QuinH), 1-nitroso-2-naphtholate (1N2N), 2-nitrophenolate (2-NP), 3-nitrophenolate (3-NP), 4-nitrophenolate (4-NP), 2,4-linitrophenolate (Dnp) and 2,4,6-trinitrophenolate (Pic), hydrated as well as dehydrated complexes of stoichiometries ML(PHEN), ML(PHEN)2, M(L, HL)(PHEN), and M(L, HL)(PHEN)2 were isolated; the latter two are new classes of alkali metal complexes and are isolated when MLPHEN interaction is carried out in the presence of HL and/or water. The stoichiometries of the complexes can be deliberately controlled which is, therefore, governed not by the coordinative characteristics of M but by the complexing environments. The counter anion, L, hinders MPHEN intertion in accordance with its basicity and ion-associating ability with M; for the most self-stabilized HO-Sal, MPHEN bonds appear distinctly covalent and the M[HO-Sal)(PHEN), complexes have been synthesised from pure water. Foreign protonated molecules - water and/or HL - in the reaction mixture favour MPHEN interaction, for they can stabilize L through conjugation. The conditions favouring conjugation are in turn influenced by structural aspects of L, the presence of water in the reaction medium, and the degree of stabilization of the counter cation.