Turbidimetric analysis of amine oxides and amine oxide-anionic surfactant mixtures

2-Methylpapaverinium iodide (1) reacted with hydroxylamine to papaverine-N-oxide (2), but without a detectable intermediate and only in moderate yield, caused by the steric hindrance of the 1-substituent. The ring opened product of 2-dinitrophenylisoquinolinium salt with hydroxylamine, the enamine-oxime 3b gave rise to a 3-substituted cyclic nitrone (6), when heated with triethylamine. This alkali-stable compound was transformed with acid quantitatively to isoquinoline-N-oxide (4). The enaminonitrile 9c, treated with triethylamine showed cyclization to the iminoisoquinoline 10, which by loss of nitrous acid produced the tetracyclic azaindole 11. The 2-methoxyisoquinolinium salt 16 was cleaved with O-methylhydroxylamine to the resistant di(O-methyloximes) (20a/b), unable to form the amine oxide 4. From these and former results, a mechanism for the ring opening of cycliminium salts and the recyclization to amine oxides was proposed.

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Multivalent electrolyte induced surface ordering and solution self-assembly in anionic surfactant mixtures: Sodium dodecyl sulfate and sodium diethylene glycol monododecyl sulfate

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2020.01.032 ◽

2020 ◽

Vol 565 ◽

pp. 567-581 ◽

Cited By ~ 2

Author(s):

Peixun Li ◽

Zi Wang ◽

Kun Ma ◽

Yao Chen ◽

Zifeng Yan ◽

...

Keyword(s):

Sodium Dodecyl Sulfate ◽

Anionic Surfactant ◽

Diethylene Glycol ◽

Self Assembly ◽

Sodium Dodecyl ◽

Surfactant Mixtures ◽

Surface Ordering ◽

Dodecyl Sulfate

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Phase behavior and properties of salt-free cationic/anionic surfactant mixtures of oleic acid and stearic acid

Chinese Science Bulletin ◽

10.1007/s11434-009-0510-y ◽

2009 ◽

Vol 54 (21) ◽

pp. 3953-3957 ◽

Cited By ~ 4

Author(s):

DianYing Zhao ◽

HongGuang Li ◽

AiXin Song ◽

JingCheng Hao

Keyword(s):

Oleic Acid ◽

Stearic Acid ◽

Phase Behavior ◽

Anionic Surfactant ◽

Surfactant Mixtures

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Surfactants, its applications and effects on environment

BIBECHANA ◽

10.3126/bibechana.v7i0.4047 ◽

1970 ◽

Vol 7 ◽

pp. 61-64 ◽

Cited By ~ 2

Author(s):

SK Shah ◽

A Bhattarai ◽

SK Chatterjee

Keyword(s):

Critical Micelle Concentration ◽

Interfacial Tension ◽

Nonionic Surfactant ◽

Anionic Surfactant ◽

Surfactant Mixtures

Surfactant is being considered as a very demandable molecule in the field of chemistry. This paper reviews most important factors especially the uses of surfactants and their effects on environment. Evaluation of surfactants are based on examining the ability of the surfactant to maintain lower interfacial tension between target contaminant and water, satisfying lower CMCs, and sustaining lower sorption and precipitation to target substrate. Surfactant mixtures of anionic and nonionic surfactant are shown to be excellent candidates for robust surfactant cleaners. Keywords: Surfactant; Interfacial tension; Critical micelle Concentration; Anionic surfactant; Nonionic surfactant DOI: 10.3126/bibechana.v7i0.4047BIBECHANA 7 (2011) 61-64

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