What are carboranes how they are classified?

Carboranes: Carboranes are clusters composed of carbon, boron and hydrogen atoms. These also can be classified like boranes as closo-, nido-, arachno-, hypho- or klado- based on whether they represent a complete (closo) polyhedron or a polyhedron with missing one (nido-), two (arachno-) or more vertices.

What is carboranes example?

Carboranes have been prepared by many routes, the most common being addition of alkynyl reagents to boron hydride clusters to form dicarbon carboranes. For example, the high-temperature reaction of pentaborane(9) with acetylene affords several closo-carboranes as well as other products: nido-B5H9 + C2H2.

What are carboranes compounds?

Carboranes are polyhedral boron-carbon. molecules or clusters stabilized by electron-delocalized covalent bonding in skeletal framework. The characteristic feature of carboranes is the presence of one or more carbon atoms in electron. delocalized boron cluster framework.

What are Nido carboranes?

Nido-Carborane-Containing Compounds Resulting from the Reaction of closo-Carboranes with Transition Metal Complexes | Inorganic Chemistry.

How many types of carboranes are there?

4.2 Closo-, Nido-, Arachno-, Hypho-, and Klado-Carboranes. The carboranes are classified based on their structural characteristics into five groups. Suitable prefixes such as closo-, nido-, arachno-, hypho-, and klado- are added to the carborane in naming them.

How are boranes and carboranes classified?

These extensive series of volatile compounds are called molecular hydrides/boranes by analogy with alkanes (hydrocarbons). Boranes can be classified into mainly three classes such as closo, nido and arachno based on their structural features. Boranes exist both as neutral and ionic species.

What is Wade’s rule explain the structure of carboranes?

Wade’s rules are used to rationalize the shape of borane clusters by calculating the total number of skeletal electron pairs (SEP) available for cluster bonding. In using Wade’s rules it is key to understand structural relationship of various boranes (Figure 6.5.

What is the general formula of Closo carboranes?

The three isomeric icosahedral closo-carboranes of formula C2B10H12 are unusual both in their ease of preparation and their stability in air. Not only has their chemistry been the most extensively studied of all carboranes, but their discovery ushered in the rapid development of the field.

What is carboranes Slideshare?

CARBORANES • Carboranes are mixed hydrides of boron and carbon in which carbon and boron atoms occupy the vertices of triangulated polyhedron. Carboranes are most important heteroboranes. Carboranes are member of a class of organometallic compounds containing carbon (C), boron (B), and hydrogen (H).

What are carboranes write their preparation properties and structure?

Thus, carboranes are mixed hydrides of carbon and boron in which both carbon and boron atoms exist in electron-deficient molecular skeleton. Carboranes are also defined as the electron- delocalized boron framework containing one or more carbon atoms.

What is bh3 called?

Trihydridoboron, also known as borane or borine, is an unstable and highly reactive molecule with the chemical formula BH. 3. .

How is carborane acid made?

Chemists realized 30 years ago that a molecule called carborane would make a superb acid. All they had to do was add a proton to carborane’s negatively charged ion (CB11H6X6, with X either Cl or Br).

What is the Iupac name of b10h14?

Decaborane, also called decaborane(14), is the borane with the chemical formula B10H14.

What is BH3 used for?

The most important use of BH3 is for the hydroboration of alkenes and alkynes. For the reaction of alkenes, there are two important things to keep in mind. The reaction is selective for the less substituted alcohol (regioselective).

Why is BH3 highly reactive?

It is an unstable compound and highly reactive in nature. It is unstable because of the incomplete octet of the boron atom in the entire molecule. It can be understood by looking at the valence electrons of Boron atom. The number of electrons in the outermost shell of Boron is 3 and that of hydrogen is 1.