Triazene

About: Triazene is a research topic. Over the lifetime, 759 publications have been published within this topic receiving 8714 citations. The topic is also known as: Triazene cleavage & 1-triazene.

Spectrophotometric Studies and Application of a New Asymmetric Triazene Ligand for Solid Phase Extraction of Ultratrace Copper and Determination by Flame Atomic Absorption Spectrometry

Abstract: A new triazene ligand, ((1-(ortoacyl benzene)3-(3,4-dichlorobenzene)triazene)) has been synthesized and k f value of it is complexes with Hg 2+ ‚ Ni 2+ ‚ Cd 2+ ‚ Pb 2+ ‚Cu 2+ ‚Ag + has been determined spectrophometrically. Because this ligand have good selectivity to copper ion, a simple, reliable and rapid method for preconcentration and determination of the ultratrace amount of copper using octadecyl silica membrane disk modified by this ligand, and determination by flame atomic absorption has been presented. Various parameters including pH of aqueous solution (7-8), flow rates (10 ml. min -1 ), the amount of ligand (6.0 mg) and the type of stripping solvent (0.1M nitric acid) have been optimized. The breakthrough volume was greater than 500 ml with an enrichment factor of more than 220 and 50ng ml -1 detection limit. The capacity of the membrane disks modified by 6mg of the ligand was found to be 220g of copper. The effects of various cationic interferences on the percent recovery of copper ion were studied. The method was successfully applied to the determination of copper ion in different samples.

Synthesis of Fused Heterocyclic Ring Systems Related to 6‐Amino‐1,4‐dihydro‐3‐methyl‐1‐phenyl‐4‐thioxothiopyrano [4,3‐c]pyrazole‐7‐carbonitrile.

Abstract: The title compound (1) was prepared and reacted with some reagents e.g Ac 2 O, HC(OC 2 H 5 ) 3 to give thiopyrano[4,3-c]pyrazole derivatives (2,10); PhNH 2 , NaOH, AcONH 4 /AcOH, H 2 NNH 2 .H 2 O to afford pyrazolo[4,3-c]pyridinederivatives (4,5,13,14). Also 1 reacted with CS 2 /CH 3 I, PhNCS, CCl 3 CN and H 2 NHNCSNH 2 to provide the pyrazolo[3',4':4,5]thiopyrarto[2,3-d]pyrimidine derivatives (7,9,12) and pyrazolo[4,3-c][1,2,4]triazolo[1,5-a]pyridine derivative (8). On the other hand the o-diamino compound (14) was used for building up a third heterocyclic ring [eg. triazene (15-17), triazole (18,19) and tetrazole (20)] through its interaction with some electrophilic reagents.

3,5-dimethylthio-2,4-bis(4,4'-dinitroazophenylaminoazo)toluene, preparation method and applications thereof

Abstract: The invention belongs to the technical field of bis triazene compounds. In the prior art, the reagent for heavy metal ion detection has low sensitivity and the selectivity is not ideal. With the present invention, the problems in the prior art can be solved. According to the present invention, with the diazotization reaction and the coupling reaction, 3,5-dimethylthio-2,4-diaminotoluene and p-aminonitro azobenzene are adopted as the raw materials to synthesize the novel bis triazene reagent, wherein the synthesized bis triazene reagent is the luminosity analysis reagent with characteristics of high sensitivity and good selectivity, and is the fluorescent reagent having the strong fluorescence characteristic.

Synthesis and Crystal Structure of cis-Bis[1,3-bis(4-nitrophenyl)-triazenido κ2N1N3]bis(pyridine-κN)cadmium(II), [Cd(O2NC6H4NNNC6H4NO2)2(C5H5N)2]

Abstract: The title complex was prepared by reaction of 1,3-bis(4-nitrophenyl)triazene with Cd(II) acetate in methanol/NaOH. Single crystals were obtained from pyridine and belong to the monoclinic space group C2/c with the lattice constants a = 20.086(1), b = 16.600(1), c = 11.250(1)A, β = 102.122(1)°. The crystal structure consists of discrete mononuclear complexes of C2 symmetry, in which the Cd(II) ions have a distorted octahedral coordination environment. Two deprotonated 1,3-bis(4-nitrophenyl)triazenide ions act as N11-η1, N13-η1 bidentate ligands. Two neutral pyridine molecules in the cis position complete the coordination sphere of the metal ion. The complexes are linked to chains via intermolecular non-classical C-H…O hydrogen bonds.