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2004•Journal of Wenzhou Teachers CollegeRequires access

Synthesis of 2-[3-(5- Nitrobenzopsendothiazole)azo]- β -Naphthol and Its Color Reaction with Bismuth

Ruping Zhang

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Abstract

The Synthesis of reagent 2-[3-(5-Nitrobenzopsendothiazole)azo]-β-Naphthol and the condition of its reaction with Bi3+ are reported. The structure of the reagent are determined by elemental analysis, UV spectrometry, IR spectroscopy and 1HNMR spectroscopy, Its dissociation constants are:pKa 6.78, λmax=420nm. The reagent reacts with Bi3+ to form a stable red complex (1∶2) in the presence of NH4 Cl-NH3 for 7.46.The apparent molar absorptivity is 5.13×104L·mol-·cm- at 1 1 λmax=540nm. Beer's law is obeyed in the range of 0~1.8mg·L- . 1

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The Synthesis of reagent 2-[3-(5-Nitrobenzopsendothiazole)azo]-β-Naphthol and the condition of its reaction with Bi3+ are reported. The structure of the reagent are determined by elemental analysis, UV spectrometry, IR spectroscopy and 1HNMR spectroscopy, Its dissociation constants are:pKa 6.78, λmax=420nm. The reagent reacts with Bi3+ to form a stable red complex (1∶2) in the presence of NH4 Cl-NH3 for 7.46.The apparent molar absorptivity is 5.13×104L·mol-·cm- at 1 1 λmax=540nm. Beer's law is obeyed in the range of 0~1.8mg·L- . 1

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Available abstract

The Synthesis of reagent 2-[3-(5-Nitrobenzopsendothiazole)azo]-β-Naphthol and the condition of its reaction with Bi3+ are reported. The structure of the reagent are determined by elemental analysis, UV spectrometry, IR spectroscopy and 1HNMR spectroscopy, Its dissociation constants are:pKa 6.78, λmax=420nm. The reagent reacts with Bi3+ to form a stable red complex (1∶2) in the presence of NH4 Cl-NH3 for 7.46.The apparent molar absorptivity is 5.13×104L·mol-·cm- at 1 1 λmax=540nm. Beer's law is obeyed in the range of 0~1.8mg·L- . 1

Key concepts: Reagent, Molar absorptivity, Chemistry, Bismuth, Color reaction, Spectrophotometry, Nuclear chemistry, Spectroscopy

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