Boron compounds

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thumb|A PYREX 1-quart [[measuring cup manufactured after 1940, featuring graduations in United States customary units]]

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type of glass with silica and boron trioxide as the main glass-forming constituents

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Borazon is a brand name of a cubic form of boron nitride (cBN). Its color ranges from black to brown and gold. It is one of the hardest known materials, along with various forms of diamond and other kinds of boron nitride. Borazon is a crystal created by heating equal quantities of boron and nitrogen at temperatures greater than 1800 °C (3300 °F) at 7 GPa (1 million lbf/in2).

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Tetranitratoborate is an anion composed of boron with four nitrate groups. It has formula . It can form salts with large cations such as tetramethylammonium nitratoborate, or tetraethylammonium tetranitratoborate. The ion was first discovered by C. R. Guibert and M. D. Marshall in 1966 after failed attempts to make neutral (non-ionic) boron nitrate, , which has resisted attempts to make it; if it exists, it is unstable above −78 °C.

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Diborynes are low-valent main-group compounds that contain a formal boron–boron triple bond (B≡B). In most isolable examples, the B≡B unit is stabilized by strong σ-donor ligands and is often described as L→B≡B←L; N-heterocyclic carbenes (NHCs) are among the most common supporting ligands. Structurally, many diborynes exhibit an approximately linear B–B ligand arrangement, which makes them a useful point of comparison to other main-group multiple-bond systems where π-bonding can be harder to sustain.

Tetrahydroxydiboron is a reagent which has several uses in organic synthesis, notably as a precursor for boronic acids used in Suzuki-Miyaura couplings

laboratory storage container

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In chemistry, an oxoborane is any chemical compound containing a boron atom with a terminal oxygen atom (a functional group). The compound class is of some relevance to academic research. The parent compound, HBO, itself called "oxoborane", together with derivatives , , , and have been detected in matrix isolation or in the gaseous phase at high temperature. In these compounds the boron and oxygen form a triple bond prone to cyclotrimerization to boroxines.

thumb|Perspective view of nanomesh, whose structure ends at the back of the figure. The distance between two pore centers is 3.2nm, and the pores are 0.05nm deep.

polymorph of boron nitride

Heterodiamond is a superhard material containing boron, carbon, and nitrogen (BCN). It is formed at high temperatures and high pressures, e.g., by application of an explosive shock wave to a mixture of diamond and cubic boron nitride (c-BN). The heterodiamond is a polycrystalline material coagulated with nano-crystallites and the fine powder is tinged with deep bluish black. The heterodiamond has both the high hardness of diamond and the excellent heat resistance of cubic BN. These characteristic properties are due to the diamond structure combined with the sp3 σ-bonds among carbon and the het