Cobalt and nickel complexes of open-chain thioether ligands terminated by salicylaldimine functionality*This article has a companion paper in this issue (doi: 10.1139/v11-083).

Abstract

Syntheses of 1,11-bis(salicylaldimine)-3,6,9-trithiaundecane (H2L1), 1,11-bis(salicylaldimine)-6-oxa-3,9-dithiaundecane (H2L2), and 1,8-bis(salicylaldimine)-3,6-dithiaundecane (H2L3), their nickel complexes [Ni(L1)]·H2O (I), [Ni(HL2)][OAc] (II), [Ni(L3)·HOAc]2[Ni(L3)·2HOAc]·3H2O (III), [Ni(HL1-sal)]Cl2·H2O (IV), [Ni(HL2-sal)]Cl2·CH3OH (V), [Ni(L3-sal)Cl]·H2O (VI), {[Ni(HL1-sal)]Br2}2{[Ni(L1-sal)]Br}·H2O (VII), {[Ni(HL2-sal)]Br2}2{[Ni(L2-sal)]Br}·2CH3OH (VIII), {[Ni(HL3-sal)Br]Br}[Ni(L3-sal)Br]·2CH3OH (IX), [Ni(HL3-sal)Br]Br·CH3OH (X), [Ni(HL3)Br]·2H2O (XI), [Ni(HL1)]2[BF4]2·5H2O (XII), [Ni(HL2)]2[BF4]2·3H2O (XIII), [Ni(HL3)]2[BF4]2·CH3CN (XIV), and [Ni(HL3)]2[BF4]2·3H2O (XV) and their cobalt complexes [Co(L1-sal)][BF4]2 (XVI), [Co(L2)][OAc]·3H2O (XVII), [Co(L3)][OAc]·3H2O (XVIII), [Co(L3)][BF4] (XIX), and [Co(L3-sal)(CH3OH)][BF4]2·CH3OH (XX) are reported. Single crystal X-ray structural studies for III, XIV, XVI, and XIX are described. Cyclic voltammograms of the ligands and of I, II, III, VII, VIII, X, XIV, and XIX are discussed. Electronic spectra of the ligands and complexes are discussed.