Coordination Reactions of 3,3'-Bis(dipyrrolylmethene) with Co(II), Cu(II), and Zn(II) Acetylacetonates, Valinates, and Dipyrrolylmethenates

摘要

Using spectrophotometry we found that ligand exchange in the systems of H2Ln[MX2]nDMF, where M denotes Co~(2+), Cu~(2+), and Zn~(2+); X means Acac~n, Val~n, dpm~n; Hdpm~n is hexamethyldipyrrolylmethene, H2L is bis(2,4,7,8,9-pentamethyldipyrrolylmethene-3-yl)methane, proceeds through successive stages of formation of hetero- and homoleptic binuclear complexes. Conventional sensitivity of the spectrophotometric determination of Co~(2+), Cu~(2+), and Zn~(2+) reaches 10~(n9) M.