Reaction of [M(ppn)2]X2 (where M = Cu(II), Ni(II), Co(II) and ppn = 1,3-diaminopropane) with formaldehyde and ethylenediamine in methanol results in the ready formation of a 16-membered macrocyclic complex. The complexes were characterized by elemental analysis, IR, EPR, electronic spectral data magnetic moments and conductance measurements. The Cu(II), Ni(II) and Co(III) complexes are coordinated axially with both pendant groups of the hexadentate macrocycle. These pendant donors are attached to the macrocycle by a carbon chain. The electrical conductivities of the Cu(II) and Ni(II) chelates indicated them to be 1:2 electrolytes whilst those of Co(III) is a 1:3 electrolyte in DMSO. The EPR spectrum of the copper complex exhibited G at 3.66, which indicates a considerable exchange interaction in the complex. Spectroscopic evidence suggests that in all of the complexes the metal ion is in an octahedral environment.

Descrevem-se neste trabalho, a síntese e a caracterização de uma série de complexos hexaazamacrocíclicos com anéis de 14 e 16 membros, obtidos pela condensação de 1,2-diaminometano ou 1,3-diaminopropano, formaldeído e hidrato de hidrazina, na presença de sais de metais do primeiro período de transição. ]Cl 2 (where M = Co(II), Ni(II) and Zn(II)), were obtained. Elemental analyses, IR spectra, 1 H NMR, EPR, UV-Vis, magnetic susceptibility and conductivity measurements have ascertained the overall geometry and stereochemistry of the complexes. An octahedral geometry has been suggested for all the complexes, except for copper compounds, in which the metal centre coordinates to the four nitrogen atoms of macrocyclic ligand in a square planar fashion. These complexes were screened against different fungi and bacteria in vitro and were found to be potentially active in the concentration 5 mg mL -1 .

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Reactions of [M2HgI4] with excess of HSO3Cl afford M2[Hg(SO3Cl)4] (M=Cu(I), K). However, the reactions of K2HgI4 with stoichiometric amounts of HSO3Cl, i.e., in 1 : 3, 1 : 2, and 1 : 1 molar ratios, yield K2[Hg(SO3Cl)nI4−n](n=3,2,1). In these reactions HSO3Cl acts as both chlorosulfating agent as well as medium of the reaction. Et4NI reacts with CuI2[Hg(SO3Cl)4] suspended in CH2Cl2 affording (Et4N)2[Hg(SO3Cl)2I2] and [CuSO3Cl]x. All these compounds have been characterized by elemental analysis, electrical conductivity measurements, IR and electronic spectral studies.

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