Abstract
The synthesis and characterization of a seriesof 4 - (4′- n -alkoxybenzylideneimino)phenyl-mercury (II) dithizonates, [CnH2n+1OC6H4CHNC6H4Hg (Hdptc)] (H2dptc = 1,5-diphenylthiocarbazone = dithizone; n = 1, 4, 12, 14 or 18), is described. The intermediate long-chain organomercury(II) acetates were obtained by condensation of 4-aminophenylmercury(II) acetate with the appropriate 4-n-alkoxybenzaldehydes. The thermal behaviour of the complexes was studied by polarized optical microscopy and differential scanning calorimetry but revealed no mesophases. All of the complexes, however, were reversibly photochromic (yellow ⇌ blue) upon irradiation of chloroform solutions with visible light, and the half-lives of the metastable blue forms were substantially increased relative to that of the parent mercury(II) bis(dithizonate). The compounds were not photochromic in the solid state. Copyright © 2000 John Wiley & Sons, Ltd.
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