Gravimetric determination of copper, iron, aluminium and titanium with N-benzoylphenylhydroxylamine

Shome, S.C.

doi:10.1039/an9507500027

Cited by 118 publications

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“…Zirconium forined a complex with the empirical formula [Zr(C13H10N02)4] that can be dried a t 110'. Titanium was completely precipitated by N-benzoylphenylhydroxylamine in a solution 5% in concentrated hydrochloric acid (4); with the other compounds complete precipitation occurred in sol~rtions only as high as 270 in hydrochloric acid. The complex of titanium was of a variable composition and it is thus not possible to dry t o constant weight.…”

Section: Clzernicalt Propertiesmentioning

confidence: 99%

Aromatic Hydroxylamines as Organo-Analytical Reagents

Lutwick¹,

Ryan²

1954

Can. J. Chem.

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'The investigation of the use, as analytical precipitants, of a number of aromatic phenyll~ydrosylamines is described. In general they react similarly, increasing in selectivity with an increase in acidity of the oxime group. In acid solutions (lye or more) only vanadium, tin, titanium, and zirconiun~ are precipitated. Their variation in reaction with copper and the nature of their reaction with tin are described. All conlpounds can act as osidants or reductants with an oxidation potential of approsimately -1.2 volts. INTRODUCTIONT h e use of cupferron [C6H5NO(NH4)NO] as an analytical precipitant was first proposed by Baudisch (1). I t is most useful in acid medium for the quantitative precipitation of iron, titanium, zirconium, vanadium, and tin; elements such as aluminum, chromium, manganese, nickel, cobalt, and the alkaline metals with which they are usually associated do not interfere. A marked disadvantage of cupferron, however, is its instability. In addition, complexes precipitated by this reagent cannot be weighed as such but must be ignited t o the oxides.* Schonle (4), by substituting a benzoyl for the nitroso group of cupferron, obtained a co~npound that was stable, and formed conlplexes with iron, alunlinum, and copper that could be dried a t llO°C. Ryan and Lutwick (3) extended the use of N-benzoylphenylhydroxylamine to the gravimetric determination of tin. The tin complex was dried a t llO°C. and weighed as [ ( C~~H~O N O Z ) Z S~C I ? I .The low solubility of the N-benzoyl derivative of phenylhydroxylamine in water necessitates close control of excess reagent and its basicity prevents the preparation of an ammonium salt. For these reasons a number of N-substituted phenylhydroxylan~ine compounds, containing a carbonyl alpha t o the oxime, were prepared and their reactivities investigated. COMPOUNDS INVESTIGATEDT h e following (mono-) N-derivatives of phenylhydroxylamine were pre-0 0 11 Il

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Section: Clzernicalt Propertiesmentioning

confidence: 99%

Aromatic Hydroxylamines as Organo-Analytical Reagents

Lutwick¹,

Ryan²

1954

Can. J. Chem.

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“…(EL K H A D E M~~) fand in den Chelaten des Eisens C=O-Absorption bci 1565-1 606 em-l). 6.3. pu' -B e n z o y 1pu' -p h e n y 1 -11 y d r o x y 1 a mi n Dieser Komplexbildner wird zur gravimetrischen Bestimmung verschiedeiier Schwermetalle eingesetzt [23][24][25], wobei eine Chelatisierung unter Einbeziehung der C=O-Gruppe diskut,iert wird26). Dies konntc auch durch unsere Versuche bestktigt werden, es gelang die Isolierung der Substanzen [Si(bpha),]Cl und C1-CH,--Si(bpha), .…”

Section: O -N I T R O S O -N a P H T H O L Eunclassified

Silicium‐Komplexe. VII. Chelat‐Komplexe des Siliciums mit Keto‐enolaten und ähnlichen Liganden

Schott

Golz

1973

Zeitschrift anorg allge chemie

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Durch Umsetzung von Organo‐trichlor‐silanen mit β‐Diketonen konnten Chelat‐Komplexe der Zusammensetzung RSi(diket)2X dargestellt werden. . Die Austauschbarkeit der Anionen X− und die Auswertung von Spektren sprechen für die Formulierung [RSi(diket)2]+X− mit 5‐koordiniertem Silicium. Die Komplexbildung von SiCl4 bzw. RSiCl3 mit 2‐Hydroxy‐acetophenon, o‐Nitroso‐n aphthol sowie N‐Benzoyl‐N‐phenyl‐hydroxylamin wurde untersucht.

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“…per 100 ml. Tlle reagent reacts much the same as does cupferron but it is more stable towards heat, light, and air; it has been used by Shome ( 3 ) to precipitate iron, copper, alunlinunl, and titanium but the complexes are more easily decomposed by acids than the cupferron derivatives. Reaction occurs, in these compounds, by replacement of the hydrogen of the oxime by the metal and co-ordination to the oxygen of the carbonyl grouping; such is not the case with tin, however, in which an addition rather than an inner complex coinpo~ii~d is formed.…”

Section: Propertiesmentioning

confidence: 99%

N-Benzoylphenylhydroxylamine as a Reagent for Tin

Ryan¹,

Lutwick²

1953

Can. J. Chem.

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N-Benzoylphenylhydroxylamine precipitates tin quantitatively from stannic chloride solutions; complete precipitation is obtained in solutions varying from 1 to 8% in concentrated hydrochloric acid. The reagent reduces stannic to stannous tin before forming the addition compound (C13H11O2N)2 SnCl2; this compound is stable and may be used as a weighing form for tin. Tin can be determined readily in brasses; copper, lead, and zinc do not interfere.

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Gravimetric determination of copper, iron, aluminium and titanium with N-benzoylphenylhydroxylamine

Cited by 118 publications

References 0 publications

Aromatic Hydroxylamines as Organo-Analytical Reagents

Aromatic Hydroxylamines as Organo-Analytical Reagents

Silicium‐Komplexe. VII. Chelat‐Komplexe des Siliciums mit Keto‐enolaten und ähnlichen Liganden

N-Benzoylphenylhydroxylamine as a Reagent for Tin

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