Metal Complex Formation of Some Anthryl Formazans

Abstract

1-(2-Pyridyl)-3-phenyl-5-anthryl formazan (PAnthPF), 1-(2-quinolyl)-3-phenyl-5-anthryl formazan (QAnthPF) and 1-(2-quinolyl)-3, 5-Biphenyl formazan (QPPF) were prepared and their acid dissociation constants and metal complex stability constants were investigated. The investigation involved the following metal ions: copper(II), zinc(II) and cadmium(II). QAnthPF reacts with metal ions to form complexes with intense color. The zinc(II) complex is red whereas the cadmium(II) complex is bluish green, the difference in their absorption maximum wavelength (Δλmax) is remarkably large (110nm).