Über die Wirkung des Lichtes auf Ferrocyankalium‐Lösung (II. Mitteil.)

Baudisch, Oskar

doi:10.1002/cber.19290621007

Cited by 16 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The substitution product from the reaction of nitrosobenzene and ferrocyanide has been known for some time1 and it also has been shown that aromatic nitroso compounds will complex ferrous hemoglobin and ferrous myoglobin.2-6 Although these last two reactions undoubtedly involve axial coordination of the heme iron by nitrosobenzene, little is known in detail about the iron-nitroso bonding. Nitrosobenzene could coordinate iron in several fashions; the most obvious are (1) through the nitrogen lone pair, (2) through an oxygen lone pair, or (3) through the nitrogen-oxygen bond. Additionally nitrosobenzene could coordinate as its dimer7 or it could act as a bridging ligand.…”

Section: Introductionmentioning

confidence: 99%

Complexes of ferrous phthalocyanine with aromatic nitroso compounds, isocyanides, and phosphites

Watkins¹,

Balch²

1975

Inorg. Chem.

View full text Add to dashboard Cite

A number of new adducts of ferrous phthalocyanine (FePc) have been isolated. These include mixed-ligand complexes LFePcL' [I-= a nitroso aromatic group, L' = n-butylamine or N-methylimidazole; L = cyclohexyl isocyanide, L' = N-methylimidazole; L = a phosphite, L' = n-butyiamine] and bis adducts LzFePc [where L is an isocyanide or a phosphite], The complexes have been characterized by elemental analysis, electronic spectra, infrared spectra, and proton magnetic resonance spectra. The ring-current-induced shifts found for coordinated nitrosobenzene have been analyzed and it is concluded that this ligand coordinates iron through the nitrogen lone pair. The rate of exchange between free and complexed nitrosotoluene in ( C H~C~H~N O ) F~P C (~-C~H~N H Z ) has been determined by observing the 'H NMR spectrum under intermediate exchange conditions. The exchange occurs via a dissociative path and the activation parameters for exchange are AH* = 20.1 f 0.2 kcal/mol and AS* = 14.2 * 0.2 eu.

show abstract

Section: Introductionmentioning

confidence: 99%

Complexes of ferrous phthalocyanine with aromatic nitroso compounds, isocyanides, and phosphites

Watkins¹,

Balch²

1975

Inorg. Chem.

View full text Add to dashboard Cite

show abstract

“…The supernatant liquids were filtered through Whatman No. 2 filter paper and the filtrate was adjusted to pH 7 before analysis.…”

mentioning

confidence: 99%

Spectrophotometric determination of cyanamide

Buyske¹,

Downing²

1960

Anal. Chem.

View full text Add to dashboard Cite

A spectrophotometric method for the quantitative determination of cyanamide in complex mixtures has been developed. This procedure measures the absorbance at 530 µ of the red complex that is formed when cyanamide and pentacyanoammineferrate interact at pH 10.5 in carbonate buffer. The lower limit of sensitivity is about 1 pg. Recoveries from blood, urine, and soil are 93% or better. Contaminants or additives often found in cyanamide preparations do not interfere with the determination. Preliminaryto studies on the pharmacology of calcium cyanamide and on the mechanism of action of this compound in the treatment of alcoholism, a simple, sensitive, and specific method of determination was desirable.

show abstract

Catalytic‐Kinetic Determination of Silver(I) Using Hexacyanoferrate(II) and 2,4,6‐Tripyridyl‐1,3,5‐Triazine(TPTZ)

2007

View full text Add to dashboard Cite

A highly sensitive and selective kinetic spectrophotometric method is proposed for the determination of silver in nanogram quantities. The method is based on catalytic activity of silver(I) in enhancing the green colour formation between potassium ferrocyanide and 2,4,6-tripyridyl-1,3,5-triazine (TPTZ) which is otherwise a very slow reaction at pH 2.0. The absorbance spectrum of the green coloured solution in presence of silver showed two peaks of almost equal intensity one at 405 nm and another at 600 nm. At both the wavelengths the absorbance of the experimental solution increased proportionally with the amount of silver(I) in the range 5 -410 ng mL -1 and 10 -610 ng mL -1 respectively. Other experimental conditions like pH, reagent concentration, ferrocyanide concentration and effect of time for obtaining maximum reaction rate were optimized. The molar absorptivity, Sandell's sensitivity, detection limit, determination limit and relative standard deviation (n = 8) were determined as 1.57 x 10 6 L mol -1 cm -1 , 0.065 ng cm -2 , 1.6 ng mL -1 , 4.8 ng mL -1 and 0.81% respectively. The effect of various diverse ions on the determination of silver was studied. The method was applied for the determination of silver in alloys, biological samples, effluents, real water and in ayurvedic medicines.

show abstract

Über die Wirkung des Lichtes auf Ferrocyankalium‐Lösung (II. Mitteil.)

Cited by 16 publications

References 8 publications

Complexes of ferrous phthalocyanine with aromatic nitroso compounds, isocyanides, and phosphites

Complexes of ferrous phthalocyanine with aromatic nitroso compounds, isocyanides, and phosphites

Spectrophotometric determination of cyanamide

Catalytic‐Kinetic Determination of Silver(I) Using Hexacyanoferrate(II) and 2,4,6‐Tripyridyl‐1,3,5‐Triazine(TPTZ)

Contact Info

Product

Resources

About