SYNTHESIS AND CHARACTERIZATION OF COORDINATION COMPOUNDS OF SILVER AND TRYPTOPHAN

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Abstract

It is shown using the isomolar series method that the synthesis of coordination compounds of silver and tryptophan both by direct interaction of AgNO3 with tryptophan and via the formation of an intermediate silver hydroxide yields target compounds with silver:tryptophan molar ratios 1:2, 1:1, and 2:1. It is established by pH-titration that synthesis of coordination compounds of silver and tryptophan via the intermediate silver oxide forms four complexes with logarithms of stability constants logβ[Ag(HL±)]+ = ±5.824, logβ[Ag(HL±)2]+ = −3.523, logβ[AgL]0 = 4.103, logβ[AgL2]− = 6.805, and logβ[AgL(HL)] = 5.771.

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