How many isomers are possible for C2B10H12?
Chem., Int. Ed., 2007, 46, 6706), the structures of which imply the intermediacy of 1,7-, 3,7-, 4,7-, 7,9- and 7,10-isomers of the nido-[C2B10]2À species.
What are carboranes examples?
Preparation. 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 is the formula of carborane?
carborane, any member of a class of organometallic compounds containing carbon (C), boron (B), and hydrogen (H). The general formula of carboranes is represented by C2BnHn + 2, in which n is an integer; carboranes with n ranging from 3 to 10 have been characterized.
What types of structures are formed by boranes and carboranes?
Arachno structures are adopted by boranes BnHn+6 and isoelectronic carboranes C2Bn-2Hn+4′ etc. Their n skeletal atoms define all but 2 of the vertices of the appropriate (n+2) vertex polyhedron .
What is Metallacarboranes?
Metallacarbaboranes (or metallacarboranes) are a class of inorganic polyhedral clusters. containing carbon, boron, hydrogen, and metal atoms in various combinations. A typical. metallacarborane is a sandwich of two [C2B9H11] 2−
What is Nido carborane?
The nido-carboranes are structures with a “nest” like appearance. The structure is similar to a closo-carborane of the same number of components in the geometry, except for a missing vertex, or, in other words, the n boron atoms occupy the vertices of an n + 1 closo-polyhedron.
What is carborane used for?
Carborane acids may also be used as strong, selective Brønsted acids for fine chemical synthesis, where the low nucleophilicity of the counteranion may be advantageous. In mechanistic organic chemistry, they may be used in the study of reactive cationic intermediates.
What are the types of boranes?
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 are higher boranes?
The higher boranes are all consisted of boron clusters that are actually polyhedral in nature. Besides the neutral boranes, a large number of anionic boron hydrides also exist.
What is the pH of Fluoroantimonic acid?
Fluoroantimonic acid has an H0 -31.3. H0 or Hammet acidity function is the same as the pH or power of hydrogen, but the difference is the pH value runs from 0 – 14 while the H0 value runs below zero. The neutral pH is 7.
How strong is carborane acid?
They are also amongst the least basic, so their conjugate acids, H(carborane), are superacids (i.e. stronger than 100% H2SO4).