Properties
The C-B bond has low polarity (the difference in electronegativity 2.55 for carbon and 2.04 for boron) and therefore alkyl boron compounds are in general stable though easily oxidized. Vinyl groups and aryl groups donate electrons and make boron less electrophilic and the C-B bond gains some double bond character. Like the parent borane, diborane, organoboranes are classified in organic chemistry as strong electrophiles because boron is unable to gain a full octet of electrons. Unlike diborane however, organoboranes do not form dimers.
Other boranes of interest are carboranes, which are cluster compounds of carbon and boron and borabenzene, the boron equivalent of benzene. The cyclic compound borole, a structural analog of pyrrole, has not been isolated, but substituted derivatives known as boroles are known.
Organoboranes with carbon replaced by oxygen are borinic esters R2BOR, boronic esters RB(OR)2 and borates B(OR)3 such as trimethylborate. In organometallic chemistry compounds with metal to boron bonds are called boryls (M–BR2) or borylenes (M–B(R)–M).
Read more about this topic: Organoboron Chemistry
Famous quotes containing the word properties:
“The reason why men enter into society, is the preservation of their property; and the end why they choose and authorize a legislative, is, that there may be laws made, and rules set, as guards and fences to the properties of all the members of the society: to limit the power, and moderate the dominion, of every part and member of the society.”
—John Locke (1632–1704)
“A drop of water has the properties of the sea, but cannot exhibit a storm. There is beauty of a concert, as well as of a flute; strength of a host, as well as of a hero.”
—Ralph Waldo Emerson (1803–1882)