The thermal and photochemical stability of PVC samples stabilised by a combination of dibutyl tin bis iso-octyl thioglycollate (DOTG) and dibutyl tin maleate (DBM) has been studied.Their behaviour shows that: (i) The system is neither synergistic nor antagonistic with regard to thermal degradati...
The reaction between dibutyl tin maleate or dibutyl tin bisbutylmaleate and chlorohexene as a model compound for allylic chloride in PVC was studied at 80°C in dichlorobutane solution. From kinetic studies by gas chromatographic analysis of the reaction medium, and also spectroscopic data (infr...
Poly(2-(diisopropylamino)ethyl methacrylate) (PDPAEMA) thin films were deposited on low temperature substrates by initiated chemical vapor deposition (iCVD) method using tertbutyl peroxide as an initiator. Very high deposition rates up to 38 nm/min were observed at low filament temperatures due ...
The role of amine groups in the phase separation of thermoresponsive poly(2-dialkylaminoethyl methacrylate)s with dimethyl-, diethyl-, and diisopropylaminoethyl substituents has been studied by atomistic molecular dynamics simulations. The polymer chains present a more compact conformation at hi...
Improved syntheses of o-aminobenzaldoxime, o-azidobenzaldehyde, and 2-substituted indazoles are described. An unequivocal synthesis of 2-(2-dimethylaminoethyl)indazole is reported.
3-O-(6-O-Acetyl-2,3-anhydro-4-deoxy-α-l-ribo-hexopyranosyl)-1,2:5,6-di-O-isopropylidene-α-d-glucofuranose has been synthesised and its monocrystal investigated by X-ray diffraction methods. The compound crystallises in the orthorhombic system, space group P212121, with cell constants a = 8.790...
α,β-Unsaturated hydrazones can be easily converted into N-allyl hydrazines by reaction with dimethylamine–borane/p-toluenesulfonic acid under mild reaction conditions. The reduction works well for N′-allylhydrazides but N′-allyl-N,N-dimethylhydrazines are rapidly reoxidised by air and so ne...
Nucleophilic addition of organometallics to N,N-dimethyl-glyoxal-monohydrazone occurs smoothly to give the corresponding α-hydroxy hydrazones in high yields. From these compounds, polyfunctional derivatives such as protected α-hydroxy aldehydes and α-hydroxy nitriles can be easily obtained in...
Intermolecular carbon radical addition to the carbon-nitrogen double bond of oxime ethers and hydrazones was studied. The reaction of unactivated aldoxime ethers proceeded smoothly in the presence of BF3·OEt2 to give the alkylated products in high yields via the free radical-mediated carbon-car...
A series of 6-aryl-4-isopropyl-2-[2-(1-phenylalkylidene)hydrazino]-1,4-dihydropyrimidine hydrochlorides was prepared and tested for antibacterial and antifungal effects. The title compounds were synthesized by cyclocondensation of N2-(1-phenylalkylideneamino)guanidines with 1-aryl-4-methyl-2-pen...
Hexafluoroacetone hydrazone condenses with ketones and aldehydes to give azines. β-Diketones give either azino-enols or hydrazino-ketones depending on the substrate. Aldehydes capable of aldol condensation and some α, β-unsaturated carbonyl compounds give pyrazoles. Isocyanates yield semicarb...
Carbanions derived from hydrazones are primarily used as equivalents of carbanions derived from ketones and aldehydes. Reactions that ultimately lead to electrophilically substituted carbonyl derivatives through hydrazone anions proceed through four separate steps. First, the hydrazone has to be...
Two triphenylamine-based hydrazones with reactive vinyl groups were synthesized and characterized. The optical, thermal, electrochemical and photoelectrical properties of the obtained compounds were studied. All the synthesized hydrazone monomers form glasses with the glass transition temperatur...
A new type of dendrimer-like hydrazone hole transporting materials have been reported and their thermal, optical, electrochemical and photophysical properties are investigated and applicability in construction of hybrid solar cells is evaluated. It was found that hole mobility in these hydrazone...
[Cu(HL)2Cl2] complexes (1–6) were prepared with trans-4-stilbenecarboxaldehyde-para-tolyl-hydrazone HStpT (HL1), trans-4-stilbenecarboxaldehyde-para-chloro-phenylhydrazone HStpClPh (HL2), trans-4-stilbenecarboxaldehyde-para-hydroxy-phenylhydrazone HStpOHPh (HL3), trans-4-stilbenecarboxaldehyde-...
Herein we present the syntheses of two types of two-site symmetric bis(hydrazone) ligands (1 and 2) which contain two tridentate subunits suitable for metal ion complexation, with remarkable solubility in most organic solvents, contrary to other pyrimidine-based bis(hydrazones) used for the prep...
A new, dual function colorimetric chemosensor and turn-off fluorescent probe based on pyrrolinone esters hydrazone dye bearing a terminal thiophene moiety (TPESHD) was designed, synthesized and investigated. The sensor exhibited highly selective and sensitive detection toward Cu2+ in ethanol aqu...
A series of new hydrazone mononuclear complexes of the type [(arene)MLCl]PF6 (M = Ru, Rh, Ir) have been synthesized in this study. All these complexes were fully characterized with the help of FT-IR, UV–Vis, mass and NMR spectroscopy. The molecular structures of representative complexes (1, 2, ...
Metal precursors of the type [(p-cymene)RuCl2]2 and [Cp*MCl2]2 (M = Rh/Ir) on reacting with benzothiazole hydrazones ligands (L1 = benzylidenehydrazinyl benzothiazole, L2 = 4-flourobenzylidenehydrazinyl benzothiazole and L3 = 4-methylbenzylidenehydrazinyl benzothiazole) in the ratio of 1:2 (M:L)...
Reactions of Cp*Rh and Cp*Ir dimers with the dipyridyl hydrazones such as picolinic (L1), nicotinic (L2) and isonicotinic (L3) have been reported here with the formulations [Cp*MClL3](PF6) {where M = Rh (5) and Ir (6)}, [(Cp*MCl)2L1](PF6) {where M = Rh (7) and Ir (8)}, [(Cp*MCl)2L2Cl](PF6) {wher...
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