Extraction equilibria for the 4-(2-Pyridylazo)-Resorcinol-Nickel(II)-Quaternary-Ammonium salt system

Hitoshi Hoshino; Takao Yotsuyanagi; Kazuo Aomura

doi:10.1016/S0003-2670(01)84658-4

Extraction equilibria for the 4-(2-Pyridylazo)-Resorcinol-Nickel(II)-Quaternary-Ammonium salt system

Hitoshi Hoshino, Takao Yotsuyanagi, Kazuo Aomura

Environmental Studies

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34 Citations (Scopus)

Abstract

The extraction equilibria of nickel(II)-PAR complexes with tetradecyldimethylbenzylammonium chloride(Q⁺Cl^-) are investigated. Two kinds of nickel complex are extracted by chloroform: Ni(HR)₂,nQ⁺Cl^-₍₀₎(ε{lunate}⁵⁰⁰ = 3.73·10⁴l mol^-1cm^-1) at about pH 5 and 2Q⁺ NiR^2-_{2 (o)}(ε{lunate}⁵⁰⁰ = 8.08·10⁴ l mol^-1 cm^-1) at above pH 8.5. The extraction constant for 2Q⁺ NiR^2-_{2 (o)} was evaluated as [2Q⁺ NiR^2-₂]₀/[NiR^2-₂] [Q⁺]² = 10^11.16 at μ = 0.1 (Na₂SO₄. Synergic extraction studies of the Ni(HR)₂ species under slightly acidic conditions show that the species is Ni(HR)₂(H₂O)₂in auqeous solution and is extracted into chloroform as the adduct Ni(HR)₂(TBP)₂ (ε{lunate}⁵³⁵ = 3.57·10⁴ l mol^-1 cm^-1. Based on the extraction behavior of these complexes, the structures of the Ni²⁺-PAR complexes are discussed.

Original language	English
Pages (from-to)	317-328
Number of pages	12
Journal	Analytica Chimica Acta
Volume	83
Issue number	C
DOIs	https://doi.org/10.1016/S0003-2670(01)84658-4
Publication status	Published - 1976 May

ASJC Scopus subject areas

Analytical Chemistry
Biochemistry
Environmental Chemistry
Spectroscopy

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title = "Extraction equilibria for the 4-(2-Pyridylazo)-Resorcinol-Nickel(II)-Quaternary-Ammonium salt system",

abstract = "The extraction equilibria of nickel(II)-PAR complexes with tetradecyldimethylbenzylammonium chloride(Q+Cl-) are investigated. Two kinds of nickel complex are extracted by chloroform: Ni(HR)2,nQ+Cl- (0)(ε{lunate}500 = 3.73·104l mol-1cm-1) at about pH 5 and 2Q+ NiR2-2 (o)(ε{lunate}500 = 8.08·104 l mol-1 cm-1) at above pH 8.5. The extraction constant for 2Q+ NiR2-2 (o) was evaluated as [2Q+ NiR2-2]0/[NiR2-2] [Q+]2 = 1011.16 at μ = 0.1 (Na2SO4. Synergic extraction studies of the Ni(HR)2 species under slightly acidic conditions show that the species is Ni(HR)2(H2O)2in auqeous solution and is extracted into chloroform as the adduct Ni(HR)2(TBP)2 (ε{lunate}535 = 3.57·104 l mol-1 cm-1. Based on the extraction behavior of these complexes, the structures of the Ni2+-PAR complexes are discussed.",

author = "Hitoshi Hoshino and Takao Yotsuyanagi and Kazuo Aomura",

year = "1976",

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doi = "10.1016/S0003-2670(01)84658-4",

language = "English",

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journal = "Analytica Chimica Acta",

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T1 - Extraction equilibria for the 4-(2-Pyridylazo)-Resorcinol-Nickel(II)-Quaternary-Ammonium salt system

AU - Hoshino, Hitoshi

AU - Yotsuyanagi, Takao

AU - Aomura, Kazuo

PY - 1976/5

Y1 - 1976/5

N2 - The extraction equilibria of nickel(II)-PAR complexes with tetradecyldimethylbenzylammonium chloride(Q+Cl-) are investigated. Two kinds of nickel complex are extracted by chloroform: Ni(HR)2,nQ+Cl- (0)(ε{lunate}500 = 3.73·104l mol-1cm-1) at about pH 5 and 2Q+ NiR2-2 (o)(ε{lunate}500 = 8.08·104 l mol-1 cm-1) at above pH 8.5. The extraction constant for 2Q+ NiR2-2 (o) was evaluated as [2Q+ NiR2-2]0/[NiR2-2] [Q+]2 = 1011.16 at μ = 0.1 (Na2SO4. Synergic extraction studies of the Ni(HR)2 species under slightly acidic conditions show that the species is Ni(HR)2(H2O)2in auqeous solution and is extracted into chloroform as the adduct Ni(HR)2(TBP)2 (ε{lunate}535 = 3.57·104 l mol-1 cm-1. Based on the extraction behavior of these complexes, the structures of the Ni2+-PAR complexes are discussed.

AB - The extraction equilibria of nickel(II)-PAR complexes with tetradecyldimethylbenzylammonium chloride(Q+Cl-) are investigated. Two kinds of nickel complex are extracted by chloroform: Ni(HR)2,nQ+Cl- (0)(ε{lunate}500 = 3.73·104l mol-1cm-1) at about pH 5 and 2Q+ NiR2-2 (o)(ε{lunate}500 = 8.08·104 l mol-1 cm-1) at above pH 8.5. The extraction constant for 2Q+ NiR2-2 (o) was evaluated as [2Q+ NiR2-2]0/[NiR2-2] [Q+]2 = 1011.16 at μ = 0.1 (Na2SO4. Synergic extraction studies of the Ni(HR)2 species under slightly acidic conditions show that the species is Ni(HR)2(H2O)2in auqeous solution and is extracted into chloroform as the adduct Ni(HR)2(TBP)2 (ε{lunate}535 = 3.57·104 l mol-1 cm-1. Based on the extraction behavior of these complexes, the structures of the Ni2+-PAR complexes are discussed.

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Extraction equilibria for the 4-(2-Pyridylazo)-Resorcinol-Nickel(II)-Quaternary-Ammonium salt system

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