An efficient methodology for the synthesis of oxabicyclo[3.3.1]nonenes and substituted tetrahydropyrans has been developed in moderate yields from the reaction of geraniol with aldehydes and epoxides promoted by boron trifluoride etherate.

New oligomers or polymers are prepared by polymerization of arsonium ylides in the presence of boron compounds.

background: boron and gadolinium are among the nuclides that hold a unique property of being a neutron capture therapy agent. neutron beams have often a considerable portion of gamma rays with fast neutrons. gamma rays, as beam contaminants, can cause considerable damage to normal tissues even if such tissues do contain high boron concentrations. materials and methods: the modification of radio...

In recent years, the industrial use and importance of boron compounds has further increased with the potential application of boron as hydrogen carrier in the form of BH4 in the exploitation of hydrogen as clean energy. Boron compounds can be produced from a variety of boron minerals and boronrich brines. Colemanite (Ca2B6O11.5H2O), ulexite (NaCaB5O6(OH)6.5H2O) and borax (Na2B4O5(OH)4.8H2O) are...

An accurate value for the heat of formation of boron trifluoride is of significant importance because this value is involved in the thermochemistry of many boron compounds. The study of the thermochemistry of boron compounds was for a long time hampered by difficulties in measuring a suitable reaction involving elemental boron. The heat of formation of boric oxide, for instance, was uncertain t...

Currently, nanostructured compounds have been standing out for their optical, mechanical, and chemical features and for the possibilities of manipulation and regulation of complex biological processes. One of these compounds is boron nitride nanotubes (BNNTs), which are a nanostructured material analog to carbon nanotubes, but formed of nitrogen and boron atoms. BNNTs present high thermal stabi...

Boron minerals are very useful for various industrial activities, such as glass industry and detergent industry, due to its mechanical and chemical properties. During the production of boron compounds, many of these are introduced into the environment in the form of waste. Boron is also an important micro nutrient for the plants to vegetate but if it exists in high concentrations, it could have...

The chemistry of boron cations was a field long neglected [2]. Meanwhile, many cations containing tetracoordinated boron have been reported [3] and their chemistry has been explored. In addition there exists scattered information relating to tri[4-8] and dicoordinated [9, 10] boron cations. Unlike carbenium ion chemistry their role in boron chemistry is not yet well understood. This situation, ...

Two newly discovered linear compounds tetraboronate and boroxine stabilized by digermylene are reported, which feature a B4O5 chain and a B3O3 ring, respectively. DFT calculations reveal that not only can digermylene stabilize the electron-deficient boron centers, but also increase the energies of the LUMOs of the boron moiety. Our results provide a hint for the development of boronate covalent...

In the last few years boron (B) compounds became increasingly frequent in the chemotherapy of some forms of cancer with high malignancy and of inoperable cancers. As more B-based therapy chemicals are developed it is necessary to review the correlation between B and the incidence of different forms of cancer, the biochemical and molecular mechanisms influenced by B and to explore the relevance ...