The reaction of 1,1,3,3-tetraethylurea (teu) with WCl6 in dichloromethane afforded [teuH][WCl6], 1, in 50-60% yield. The X-ray structure determined for includes the first example of crystallographic characterization of a N-protonated urea. According to spectroscopic and DFT outcomes, the formation of 1 is the result of an electron transfer/C-H activation process.

The monosila analogue of the C6Me7+ cation can be accessed by hydride abstraction from (pentamethylcyclopentadienyl)dimethylsilane, Cp*SiMe2H. Treatment of this material with triphenylmethylium tetrakis(pentafluorophenyl)borate in dichloromethane at -50 degrees C produced a single cationic species stable for a day or longer. The presence of a single resonance for the ring methyls and a single r...

A macrocyclic trinuclear complex of (1,3,5-trimethylbenzene)ruthenium(II) bridged by 2,3-dioxopyridine was synthesized, and the extraction properties for lithium and sodium picrates were investigated in a dichloromethane/water system at 25 degrees C. The complex was found to have extremely high extractability and selectivity for lithium picrate; the logarithmic values of the extraction constant...

The title compound, C(36)H(44)B(2)O·0.5CH(2)Cl(2), contains an almost linear O-B-O linkage [177.23 (15)°] and approximately orthogonal [interplanar angles 89.49 (5) and 80.77 (4)°] trigonal planar B centers, consistent with the previously reported non-solvated structure [Cardinet al. (1983). J. Chem. Res. (S), p. 93]. Inter-molecular C-H⋯π inter-actions exist between mesityl groups, with a C-H⋯...

A monofunctionalised pillar[5]arene derivative carrying a viologen side chain which exhibits self-complexation in dilute dichloromethane solutions forms supramolecular daisy chain polymers and eventually organogels as its concentration is increased three-fold over the range from 0.1 to 100 mM.

A simple method has been developed for the reductive deoxygenation of aromatic ketones and benzylic alcohols in the presence of polymethylhydrosiloxane (PMHS). The reductive deoxygenation of aromatic ketones and benzylic alcohols, including secondary alcohols, to the corresponding methylene hydrocarbons has been achieved in good to excellent yields using palladium chloride (PdCl2) as catalyst a...

A study has been made of t he reactions of lithium aluminum hydride with methyl bromide, methylene chloride, meth ylene bromide, methylene iodide, chloroform, bromoform, and carbon t etrachloride. Except for hydrogen and unreacted h alida, essentia lly pure methane was formed in each case. The amount of hydrogen evolved increased with the n umber of halogen atoms in the molecule, reaching a max...

Abstract The synthesis of Lipoxin B 4 analogs (LXB ) to gain access stabilized inflammation resolving compounds is an actual field research. Focusing on variation and stabilization the conjugated E,Z,E,E C6–C13 tetraene moiety natural LXB , a methylene bridge introduced between C6 C11 suppresses any Z/E isomerization C8–C9 olefin. Intending enable prospective structure variations in connection ...

A new, sensitive, simple, inexpensive and fast kinetic spectrophotometric method was developed for the determination of trace amounts of morphine over the range of 12-60ng/mL. The method is based on the catalytic effect of morphine on the reaction of bromate and methylene bluein acidic media is reported. The reaction was monitored spectrophotometrically by 60 ng/ml measuring the decrease in abs...

The vibrational relaxation of the liquid dihalomethanes CH2I2, CH2Br2 and CH2Cl2 has been studied by a combination of IR/IR and IR/Raman pump-probe techniques applying a time resolution of ~2 ps. Careful analysis of the results shows a general trend of decreasing relaxation rates from dichloromethane to diiodomethane, with few individual deviations. Possible explanations for these observations ...