User:OrganoMetallurgy/Drafts/closo-1,5-Dicarbapentaborane

= non-chembox sections = closo-1,5-Dicarbapentaborane, C2B3H5, is gas is a carborane on the boundary between carboranes an organoboranes.

Structure and bonding
Trigonal bipyramid with hydrogen decorating the vertices. The nature of the bonding/interaction between the boron atoms. Something something either a closo carborane with multicenter bonding between the boron and carbon atoms or more like bicyclo[1.1.1]pentane with single bonds between the boron and carbon atoms and no bonds between the boron atoms. Something something computational and experimental studies something something geometry something something bond lengths something something electron density something something.

Synthesis
First produced as a one of the products of a gas phase reaction pentaborane and acetylene in a glow discharge. A better means of producing it involves the degradation of nido-2,3-C2B4H8 which can be produced from the reaction

Reactions
Dicarbapentaborane is relatively stable; it does not react with oxygen, water? (contradictory information (maybe one refers to liquid water and the other to water vapor?), carbon dioxide, acetone, or triethylamine at room temperature. It as a liquid it slowly polymerizes but it is thermally stable up to 150 °C as a gas. In solution it is chlorinated by Cl2 at reduced temperatures to 2-Cl-1,5-C2B3H4l In gas phase It reacts with trimethylborane to produce a mixture of mono-, di-, and trimethylated derivatives with the methyl groups attached to boron.