Spectrophotometric study of complexes of mercury(II) with mono- and dithiosemicarbazones

Add time:07/26/2019    Source:sciencedirect.com

The formation of complexes at pH 4.7 of the Hg(II) with five monothiosemicarbazone and two dithiosemicarbazone has been studied. The mercury(II) reacts with monothiosemicarbazones of salicylaldehyde (λmax = 363 nm, E = 1.69 × 104liters · mol−1cm−1), pi-colinadehyde (λmax = 363 nm, E = 2.38 × 104liters · mol−1cm−1), 6-methyl-picolinaldehyde (λmax = 363 nm, E = 2.28 × 104liters · mol−1cm−1), di-2-pyridylketone (λmax = 380 nm, E = 2.08 × 104liters · mol−1cm−1), and o-naphthoquinone (λmax = 540 nm, E = 1.03 × 104liters · mol−1cm−1) and with dithiosemicarbazones of 1,4-dihydroxyphthalimide (λmax = 430 nm, E = 2.56 × 104liters · mol−1cm−1) and dipyridylglyoxal (λmax = 363 nm, E = 2.37 × 104liters · mol−1cm−1). A critical comparison of the stoichiometry and apparent stability constant of complexes with mono- and dithiosemicarbazones is given.

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