The bis (methylthio) methylene malononitrile (1) on treatment with 2-amino pyridine (2) in N,N-dimethyl formamide (DMF) and anhydrous potassium carbonate, gives 3-cyano-4-imino-2-(methylthio)-4H-pyrido[1,2-a]pyrimidine (3). The latter were further reacted with selected N-, O- and C-nucleophiles ...

Until recently, (methylthio)phenols as natural products had only been reported from bacteria. Now, four representatives of this class of sulfurous aromatic compounds have been discovered as semiochemicals in the orchid Caladenia crebra, which secures pollination by sexual deception. In this case...

Three new chiral managanese(III) porphyrins bearing chloro and glucosyl substituents have been used as catalysts for enantiomeric epoxidation of 4-chlorostyrene in the presence of diluted hydrogen peroxide as oxygen donor. With such complexes enantiomeric excesses (22%) are obtained, in the pres...

Dielectric permittivity has been measured for some ternary mixtures of poly(ε-caprolactone), poly(4-chlorostyrene) and dioxane at 25°C. The relaxation time due to the longitudinal component of the ester-group dipole in the polylactone chain increases roughly linearly with increasing total poly...

This paper reports some major improvements for the radical polymerization of 3-nitro-4-chlorostyrene (4CNS), the reactivity of which is expected to be high according to the Hammett free energy relationship. Some features of the polymerization of 4CNS have been studied; the results of bulk, solut...

Most studies of coil-to-globule transitions of macromolecules have dealt exclusively with the standard polystyrene–cyclohexane system. In this work we aim to extend such investigations to halogenated polystyrenes, namely poly(4-chlorostyrene)(PPCS), poly(2-chlorostyrene)(POCS) and poly(chlorost...

The epoxide hydrolase from Sphingomonas sp. HXN-200 catalyzed the enantioselective hydrolysis of racemic 2-, 3-, and 4-chlorostyrene oxides 1–3 to form the corresponding (R)-diols and gave the (S)-epoxides 1–3 in high ee. The reactions were examined with frozen/thawed cells as well as cell-fre...

The molecular structure and vibrational spectrum of 4-chlorostyrene have been investigated by ab initio and DFT calculations combined with infrared/Raman and Inelastic Neutron Scattering (INS) spectroscopies. The molecular geometry has been optimized at different levels of theory, RHF, MP2, B3LY...

Pressure-composition (P–x) isotherms were obtained for the carbon dioxide + 4-chlorostyrene (4-CS) system using static apparatus at five temperatures (313.2, 333.2, 353.2, 373.2 and 393.2 K) and pressure up to 23.74 MPa. The experimental results for the carbon dioxide + 4-CS system were modeled...

The side-chain oxygenation of styrene is able to yield substituted phenylacetic acids from corresponding styrenes by co-metabolic transformation. This co-metabolization was investigated in Pseudomonas fluorescens ST using 4-chlorostyrene as co-substrate. It was shown that non-substituted styrene...

The first electronic excitation and adiabatic ionization energies of 35Cl and 37Cl 4-chlorostyrene were similar, with values of 33,977 ± 2 and 67,972 ± 5 cm−1, respectively. The general features in the obtained vibronic and cation spectra of the two isotopologues were similar. A frequency shif...

Several diorgano- and dihalotin(IV) derivatives of new β-diketonate donors, 1,3-dimethyl-4-R(CO)pyrazol-5-ones (R=Me, QDH; R=Ph, QMH) have been synthesized and characterized with analytical and spectroscopic methods. They are stable monomeric species, very soluble not only in aromatic and chl...

Stable, four-coordinated (Q)2Sn compounds have been prepared, where QH is 1-phenyl-3-methyl-4-RC(O)-pyrazol-5-one (R = CH3, CF3, n-C6H13, C6H5,pF-C6H4,p-Cl-C6H4,p-Br-C6H4,p-I-C6H4,p-NO2-C6H4,p-CH3O-C6H4). They have been characterized through analytical data, IR and1H,13C and119Sn NMR spectroscop...

Among various light-absorbing materials, Copper Zinc Tin Sulphide (CZTS), Selenide (CZTSe) and their alloy structures (CZTSxSe1-x) are viewed as important candidates in thin film solar cell applications. Next development in this field could be a band edge engineering using varied composition lay...

The following gaseous products are released, in addition to oxygen, in reactions of O2SbF6 with water, CO, CH4 and SO2, respectively: O3, COF2, CHF3 and SO2F2. Nitrogen dioxide forms the solid complex NO2SbF6, and nitric oxide forms a mixture of NOSbF6 and NO2SbF6. No reaction of CO2 with O2SbF6...

Two methods are described for the gravimetric determination of the hexafluoroantimonate anion with tetraphenylarsonium chloride and nitron as precipitants. In addition, a spectrophotometric method for this anion with ferroin as reagent is described. Hydrolysis of the anion is avoided by using st...

Hybrid electrolytes produced by the sol–gel process were obtained by doping a di-urea cross-linked POE/siloxane hybrid host framework (d-U(2000)) with lithium hexafluoroantimonate (LiSbF6). Flexible, transparent xerogel films with ∞ > n ≥ 2.5 (where n, composition, represents the molar ratio ...

The heat capacity of the cubic form of potassium hexafluoroantimonate(V) has been measured from 21 to 284 K. There are no indications of any transition or thermal anomaly in this temperature range. Unlike some hexafluorophosphates and hexahalostannates, the heat capacity of potassium hexafluoroa...

The effect of growth conditions on the growth morphology of ice analogue crystals (sodium fluorosilcate) has been studied. The results show that sodium fluorosilicate crystals can replicate most of habits typical for atmospheric ice crystals: hexagonal columns, hexagonal plates, stellar and sect...

IntroductionMineral trioxide aggregate (MTA) satisfies most of the ideal properties of a surgical root-end filling and perforation repair material. It has been found to be nontoxic, noncarcinogenic, nongenotoxic, biocompatible, insoluble in tissue fluids, and dimensionally stable and promotes ce...