The solvolysis of 2-(ω-methylthioalkyl)- and 2-(ω-benzylthioalkyl)-3-methyl-2-cyclohexenyl p-nitrobenzoates 5 and 6 in 80 vol % ethanol includes several competitive reactions. Path k1 is a stepwise process (kH/kD = 1.18–1.20) which includes allylic cation 9 as a reaction intermediate, while p...

In an attempt to study possible n-participation in allyl derivatives, 2-(2-methoxyethyl)-3-methyl-2-cyclohexenyl p-nitrobenzoate 4 was solvolyzed in various solvents including fluorinated alcohols. Its solvolysis rate is slower than that of the 2-butyl analog 3. This rate retardation can be expl...

Despite of extensive attention on the ethanol to butadiene (ETB) conversion, the catalyst deactivation during ETB conversion is rarely investigated and poorly understood. Here, the mechanism of the catalyst deactivation during the ETB conversion over Zn-Y/Beta was investigated through several co...

In an attempt to study possible π -participation in allyl derivatives, 3-alkenyl-5,5-dimethyl-2-cyclohexenyl p-nitrobenzoates 4 and 2-alkenyl-3-methyl-2-cyclohexenyl p-nitrobenzoates 5 were solvolyzed in 97 wt % trifluoroethanol and 80 vol % ethanol. Water soluble 1-methyl-3-(3-alkenyl-5,5-dime...

Halogeno(methyl)pentafluorophenylsilanes C6F5SiMenX3−n (n=1, 2) (X=F, Cl, Br) were prepared in good yields from the corresponding phenylsilanes C6F5SiMenPh3−n by reactions with the electrophiles aHF, HCl–AlCl3, Br2–AlBr3 or AlX3 (X=Cl, Br) halogenated hydrocarbons. Additionally, reactions of C...

Poly(diarylsiloxane)s are highly crystalline, high-melting polymers with excellent high-temperature properties. As a consequence of the rigid polymer backbone, they show crystal-liquid-crystal transitions, and both nematic and smectic states have been observed by optical microscopy. The polymers...

Treatment of either RuHCl(CO)(PPh3)3 or MPhCl(CO)(PPh3)2 with HSiMeCl2 produces the five-coordinate dichloro(methyl)silyl complexes, M(SiMeCl2)Cl(CO)(PPh3)2 (1a, M = Ru; 1b, M = Os). 1a and 1b react readily with hydroxide ions and with ethanol to give M(SiMe[OH]2)Cl(CO)(PPh3)2 (2a, M = Ru; 2b, M...

Six iridium complexes with 2-(2-trifluoromethyl)pyrimidine-pyridine as the main ligand and 2-(5-phenyl-1,3,4-oxadiazol-2-yl)-phenol or 2-(5-phenyl-1,3,4-thiadiazol-2-yl)-phenol derivatives as ancillary ligands were synthesized. The crystal structures of the complexes adopted pseudo-octahedral co...

Substituted phenyl[(5-benzyl-1,3,4-oxadiazol-2-yl)sulfanyl]acetates/acetamides 9a-j were synthesized as alkaline phosphatase inhibitors. Phenyl acetic acid 1 through a series of reactions was converted into 5-benzyl-1,3,4-oxadiazole-2-thione 4. The intermediate oxadiazole 4 was then reacted with...

The replacement of dimethylacetamide with arylacetic acid esters and acetamides at the imidazo[4,5-c]pyridine 5-position of EMD 66684 2 imparts affinity for the AT2 receptor. The highest affinity was found with the phenylacetic acid isopropylester moiety, which led to compound 7c with an IC50 va...

SummaryThe synthesis and pharmacological activity of balanced high affinity non-peptide angiotensin II antagonists of the AT1 and AT2 subtype receptors have been presented. A series of previously prepared AT1 selective 4,5-dihydro-4-oxo-3H-imidazo [4,5-c]-pyridines were modified at four differen...

The results of this extensive electrochemical study of the electrochemical reactions of SnO2 electrodes in lithium-ion batteries demonstrate that the different reduction and oxidation reactions overlap significantly during the cycling and that the rates of the redox reactions are limited by the ...

Due to unique optical and electronic properties tin oxide nanoparticles (SnO2 NPs) have shown potential for various applications including solar cell, catalyst, and biomedicine. However, there is limited information concerning the interaction of SnO2 NPs with human cells. In this study, we explo...

Tin(IV) oxide catalysts, pure and surface-doped with different loading levels of sulfate, have been prepared and characterized by means of thermal analysis (TGA and DTA), X-ray powder diffraction (XRD), nitrogen adsorption at 77 K, FT-IR spectroscopy using KBr pellets and potentiometric titratio...

The pristine and (Fe and Ni)-doped tin (IV) oxide (SnO2) nanosheets were synthesized by hydrothermal method. These nanosheets were characterized in detail by UV- visible spectroscopy, fourier transform infra-red (FT-IR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) an...

Tin(IV) [email protected] graphene oxide nanocomposites are synthesized using a simple hydrothermal method. The structural and morphological characterizations indicate that the SnO2 nanoparticles fully and homogeneously anchor on both sides of cross-linked reduced graphene oxide. As an anode mat...

Sn6O4(OH)4, a hydrolysis product of Sn(NMe2)2, is transformed to tin (II) or tin (IV) oxide by solid and solution phase processing. Tin (II) oxide is formed by heating Sn6O4(OH)4 at ⩽200 °C in air or under inert atmosphere. Tin (IV) oxide nanoparticles are formed in the presence of a carboxylic...

A series of four Tin(IV)porphyrins with different substituents on meso-phenyl groups, trans-dihydroxy-5,10,15,20-tetra(p-tolyl)porphyrinatetin(IV) (Sn(IV)TTP(OH)2), trans-dihydroxy-tetra(2,4,6-trimethyl)phenylporphyrinatetin(IV) (Sn(IV)TMP(OH)2), trans-dihydroxy-5,10,15,20-tetra(p-carboxyphenyl)...

The nature of paramagnetic centers which are responsible for the EPR signal at g = 1.8–1.9 in tin (IV) oxide was studied. Polycrystalline SnO2 samples were obtained by sol–gel method and by thermal treatment of the precursors containing tin atoms in different oxidation states. The parameters o...

We report on the detailed study of wavelength tunability of passively Q-switched erbium doped fiber laser using Tin(IV) Oxide (SnO2) as saturable absorber (SA). As a typical n-type semiconductor, SnO2 has been widely used in gas sensors, oxidation catalyst, transparent conductor, and electrode m...