borazine

Although often compared with benzene, borazine is far more reactive.

For this reason borazine is sometimes referred to as "inorganic benzene".

Ion–molecule reaction schemes for reaction of borazine molecular ions have been proposed.

But this does not prevent a compound such as borazine (which has no carbon atoms) from being labelled "heterocyclic".

A typical borazine vapor pressure inside the ultrahigh vacuum chamber during the exposure is 3x10 mbar.

Like benzene, borazine is a colourless liquid.

Other well known inorganic rings include borazine, SN, and the cyclic siloxanes.

In a two-step process to borazine, boron trichloride is first converted to trichloroborazine:

For example, borazine is a six-membered ring composed of alternating boron and nitrogen atoms, each with one hydrogen attached.

CVD of borazine on other substrates has not led so far to the formation of a corrugated nanomesh.

The gas phase ion–molecule reactions and proton affinity of borazine have been investigated by both theoretical ab initio and ion cyclotron resonance techniques.

Well-ordered nanomeshes are grown by thermal decomposition of borazine (HBNH), a colorless substance that is liquid at room temperature.

Heating borazine at 70 C expels hydrogen with formation of a borazinyl polymer or polyborazylene, in which the monomer units are coupled in a para fashion by new boron-nitrogen bonds.

It consists of a single BN layer, which forms by self-assembly a highly regular mesh after high-temperature exposure of a clean rhodium or ruthenium surface to borazine under ultra-high vacuum.

Spin–spin coupling constants over five, six, and seven bonds between protons in different methyl groups are reported for the xylenes, derivatives of benzene, pyridine, pyrimidine, pyridinium salts, p-benzoquinone, and borazine.

Pyrolysis of blends of this "borazine wax" with mesogenic or mesophase hydrocarbon pitches results, respectively, in suppression of the mesophase formation or in partial anisotropy, correlated with blend composition.

The electronegativity of boron (2.04 on the Pauling scale) compared to that of nitrogen (3.04) and also the electron deficiency on the boron atom and the lone pair on nitrogen favor alternative mesomer structures for borazine.

Hexagonal BN can be prepared in the form of fibers, structurally similar to carbon fibers, by thermal decomposition of extruded borazine (B3N3H6) fibers with addition of boron oxide in a nitrogen atmosphere at 1800 C.

Calculations at the INDO-MO-FPT level of methyl proton couplings in N- and B-methylborazines are in agreement with the available experimental evidence in indicating a relatively weak transmission of spin density information via the presumed π electron system of borazine.

Ab initio calculations find the proton affinity of borazine to be 203.4 kcal/mol and the most energetically favorable structure of the borazinium ion is one in which very little structural change occurs relative to neutral borazine with the exception of the geometry about the protonated nitrogen atom.