The activation of a section, or of all the carbons of thiophene by bromine in lithium-halogen exchange reactions, was implemented in a step-wise manner to facilitate the preparation of novel multiple Fischer carbene-bearing thiophene compounds.

The temperature dependence of the open-circuit potential of lithium half-cells was measured for electrodes of carbon materials having different amounts of structural disorder. The entropy of lithium intercalation, DS , and enthalpy of intercalation, DH , were determined over a broad range of lithium concentrations. For the disordered carbons, DS is small. For graphite, an initially large DS dec...

Rechargeable lithium ion batteries are important energy storage devices; however, the specific energy of existing lithium ion batteries is still insufficient for many applications due to the limited specific charge capacity of the electrode materials. The recent development of sulfur/mesoporous carbon nanocomposite cathodes represents a particularly exciting advance, but in full battery cells, ...

OBJECTIVE Observational studies suggest that long-term lithium treatment has a strong antisuicidal effect in mood disorders, but it is uncertain whether this association is a genuine therapeutic effect or is due to confounding factors in nonrandomized studies. The authors conducted a systematic review and meta-analysis of randomized trials to investigate the effect of lithium, compared to place...

Lithium cyclopentadienyl derivatives are one of the most applied starting materials in organometallic synthesis. At the same time lithium organics with a C5 perimeter are certainly the most elaborated class of compounds in s-block organometallic chemistry. They are compounds par excellence to generate a huge variety of sandwich or half-sandwich d-block organometallics via transmetalation or sal...

the effects of chronic administration of lithium, on acute toxicity of carbamazepine (cbz) in mate albino mice was studied and the ld50 values were determined from dose-probit curves. the results showed that in lithium pretreated animals (animals consumed drinking water contraining 600 mg/l lithium carbonate for 10 days) the ld50 value (the doese corresponding to probit 5) of cbz decreased sign...

1. Oxidation of vitamin A acetate with monoperphthalic acid gave 5,6-monoepoxyvitamin A acetate, C(22)H(32)O(3), obtained as pale-yellow crystals, m.p. 65-66 degrees . 2. Saponification of 5,6-monoepoxyvitamin A acetate yielded 5,6-monoepoxyvitamin A alcohol, which was readily oxidized with manganese dioxide to 5,6-monoepoxyvitamin A aldehyde, obtained as yellow crystals, m.p. 101-102 degrees ....