Synthesis, Characterisation and Anti-Fungal Activities of Some New Copper(II) Complexes of Octamethyl Tetraaza-Cyclotetradecadiene

Abstract

The ligand Me₈[14]diene, L, in its free state as well as in the dihydroperchlorate form, L.2HClO₄, coordinates copper(ll) in different salts to yield a series of [CuLX_x] X_y(H₂O)_z complexes where X = NO₃, ClO₄, NCS, Cl and Br; x and y may have values of 0 or 2 and z = 0, 1 or 2. The complex, [CuL(ClO₄)₂].2H₂O is found to undergo axial ligand substitution reactions with SCN^-, NO₃ and Cl^- to give a variety of substitution derivatives: [CuL(ClO₄)_m X_n] where X = NCS, NO₃ and Cl; m = 0 or 1, and n = 1 or 2. The complexes .have been characterised on the basis of analytical, spectroscopic, magnetic and conductance data. The anti-fungal activities of the ligand and its complexes have been investigated against a range of phytopathogenic fungi.

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