Some nickel(II) and cobalt(III) complexes of two isomeric Tetraethyl-dimethyl-1,4,8,11-tetraazacyclotetradecadienes

Abstract

Preparations of N-rac- and N-meso-[Ni(l)][C1O4]2, N-meso-[Ni(l)(NCS)]2, N-rac-[{Ni(l)}2C2O4]-[ClO4]2, N-rac-[Co(l)acac][ClO4]2 and trans-N-rac-[Co(l)X2] ClO4, X = Cl-, Br-, OAc-, NO2- are reported [where (1)= C-meso-(5,7,12,14-tetraethyl-7,14-dimethyl-l,4,8,ll-tetraazacyclotetradeca-4,ll-diene)]. The p.m.r. spectra of N-rac- and N-meso-[Ni(l)]2+, some cobalt(111) derivatives of (1), and of [Ni (2)]2+, where (2) = C-meso-(5,7,12,14-tetraethyl-7,12-dimethyl-l,4,8,1l-tetraazacyclotetradeca-4,14-diene), a geometrical isomer of (1), are described. The configurational assignments are deduced from the chemical properties and p.m.r, spectra.