A range of four coordinate metal complexes: square planar MX2L2 where M = Ni, Pd and Pt, X = Cl, Br and I and L = Et3P and Et2PhP; dinuclear planar M2X4L2 where M = Pd and Pt, X and L as above; and tetrahedral MX2L2 where M = Co and Zn, X and L as above, have been prepared and their low frequenc...

The preparation of complexes of the type HgX2(PR3)2 [X = Cl, Br or I; R = 2-furyl or 2-thienyl] has been investigated, and a series of compounds has been characterised by analytical and, where possible, solid state vibrational and 31P NMR solution studies. In addition, the X-ray crystal structur...

The known nickel(III) complexes [Ni(PR3)2X3]) (X = Cl, Br) with monodentate phosphines (PMe3, PEt3, PnBu3, PMe2Ph X = Br only) have been reexamined, some being obtaines in a pure state for the first time. New complexes with PMe2Ph, PEt2Ph and PMePh2 are described. Detailed spectroscopic data (IR...

The thermal decomposition of arylmethylbis(triethylphosphine)nickel(II), ArNiMeL2, is studied in hydrocarbon solutions, both in the presence and absence of aryl halide. The direct thermolysis affords methylarenes without aryl scrambling, by first-order kinetics. The inverse phosphine dependence ...

The first synthesis of the title compounds has been achieved starting from chloralamides by a route involving chemical and electrochemical steps. N-(1-Alkoxy-2,2,2-trichloroethyl)benzamides were efficiently prepared from chloralbenzamides and were electrochemically converted into N-(1-alkoxy-2,2...

Three new 20-electron bis-α-diimine nickel (II) complexes containing chloro-substituted ligands, bis{bis[N,N′-(3-chloro-2-methylphenyl)imino]-1,2-dimethylethane}dibromonickel 2a, bis{bis[N,N′-(3-chloro-2,6-dimethylphenyl)imino]-1,2-dimethylethane}dibromonickel 2b and bis{bis[N,N′-(4-chloro-2...

The properties of triplet-excited trans-4-hydroxy-4′-nitrostilbene were studied by photochemical means. This species produces singlet molecular oxygen with a quantum yield of ΦΔ = 0.4 in benzene and 0.05 in acetonitrile. Population of the triplet state was also detected by flash photolysis. T...

The excited singlet state properties of 4′-nitro- and 2′,4′-dinitro-substituted trans-4-hydroxystilbenes were studied in various solvents. The fluorescence quantum yield (Φf) of the former compound in solvents unable to form strong hydrogen bonds goes through a maximum as a function of the s...

The ground-state and excited-state electronic structures, relaxation dynamics as well as photophysical properties of the donor–π–acceptor compound 2-dimethylamino-7-nitrofluorene (DMANF) have been theoretically investigated using density functional theory (DFT) and time-dependent density func...

Diastereomeric 5-tert-butyl-4-methyl-2-phenoxy-2-oxo-1,3,2-dioxaphosphorinanes were synthesized, and studied by NMR and computational methods in order to determine their predominant conformations as well as their relative configurations. The study was performed assuming a novel criteria, in whic...

Crystal structures of three 1,2,4,5-tetrakis(bromomethyl)-3,6-bis(2-alkoxy)benzenes 1–3 with different length and branching of alkyl chains are analyzed. X-ray structure determinations showed relatively undistorted molecular structures. Crystal packing is defined by networks of C–H⋯Br weak hyd...

To improve the air-stability of OFETs, several strong electron-withdrawing groups were introduced to both terminals of the benzene-fused bis (tetrathiafulvalene). This strategy indeed brought many useful changes, such as HOMO energies level, packing structure. Their oxidation potentials determin...

A typical coloured impurity contaminating commercial N-(1,3-dimethylbutyl)-N′-phenyl-1,4-phenylenediamine (HPPD) was isolated and its structure has been determined. The pathway of its formation during the production and/or storage of HPPD has been proposed.

A novel sulfonated diamine monomer, 3-(2′,4′-diaminophenoxy)propane sulfonic acid (DAPPS), was successfully synthesized and the sulfonated polyimide (SPI) was prepared from 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTDA) and DAPPS. The resulting SPI, NTDA–DAPPS, was soluble in common or...

Oxidative fluorination of alkyl iodides with p-iodotoluene difluoride (4) was carried out. In the presence of Et3N–4HF, the fluorination reaction of prim-alkyl iodides selectively took place at the iodine position under mild conditions to give the corresponding alkyl fluorides in good yields.

Activity coefficients at infinite dilution have been measured by gas–liquid chromatography for 27 organic solutes (n-alkanes, 1-alkenes, 1-alkynes, cycloalkanes, aromatics, alcohols, and ketones) in the ionic liquid trihexyl(tetradecyl)phosphonium tetrafluoroborate [3C6C14P][BF4]. The measureme...

Vapour–liquid equilibria of ionic liquid – carbon dioxide systems, as well as thermo-physical properties of the system components are very important to design and optimize various separation and reaction processes. In this work the solubility of carbon dioxide (CO2) in trihexyl(tetradecyl)phos...

Biofouling is a major operational problem in reverse osmosis (RO) processes. Recently, direct dosing of non-oxidizing biocides into RO vessels has been attempted to effectively alleviate biofouling. Tributyl tetradecyl phosphonium chloride (TTPC) is an efficient non-oxidizing biocide, but its ap...

A series of twenty five new thiobarbituric acid derivatives, viz. 3a-h, 4–7, 8a-c, 9, 10a-c, 11 and 12a-d, were designed and synthesized as potential cytotoxic agents. In-vitro screening of the new compounds against the three human cancer cell lines Caco-2, HepG-2 and MCF-7 was performed to ass...

Nightmares are a highly prevalent and distressing feature of post-traumatic stress disorder (PTSD). Previous studies have reached mixed conclusions regarding the effects of prazosin on nightmares, sleep quality and overall PTSD symptoms in patients with PTSD. MEDLINE, EMBASE, all EBM databases, ...