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A borane is a compound with the formula BR x H y although examples include multi-boron derivatives. A large family of boron hydride clusters is also known. In addition to some applications in organic chemistry , the boranes have attracted much attention as they exhibit structures and bonding that differs strongly from the patterns seen in ...
Boron hydride clusters are compounds with the formula B x H y or related anions, where x ≥ 3. Many such cluster compounds are known. Common examples are those with 5, 10, and 12 boron atoms. Although they have few practical applications, the borane hydride clusters exhibit structures and bonding that differs strongly from the patterns seen in ...
Borane makes a strong adduct with triethylamine; using this adduct requires harsher conditions in hydroboration. This can be advantageous for cases such as hydroborating trienes to avoid polymerization. More sterically hindered tertiary and silyl amines can deliver borane to alkenes at room temperature. Borane(5) is the dihydrogen complex of
Borane hydrides such as 9-BBN and L-selectride (lithium triborohydride) are reducing agents. An asymmetric catalyst for carbonyl reductions is the CBS catalyst, which relies on boron coordination to the carbonyl oxygen.
Pentaborane(9) is an inorganic compound with the formula B 5 H 9.It is one of the most common boron hydride clusters, although it is a highly reactive compound.Because of its high reactivity with oxygen, it was once evaluated as rocket or jet fuel.
A large number of anionic boron hydrides are known, e.g. [B 12 H 12] 2−. The formal oxidation number in boranes is positive, and is based on the assumption that hydrogen is counted as −1 as in active metal hydrides. The mean oxidation number for the boron atoms is then simply the ratio of hydrogen to boron in the molecule.
Boron monohydride can be formed from borane carbonyl exposed to ultraviolet light. BH 3 CO → BH + CH 2 O [2] Boron monohydride is formed when boron compounds are heated to a high temperature in the presence of hydrogen. [3] Boron monohydride is formed when the boron anion B − reacts with a hydrogen ion H +. It is also formed when atomic ...
In the special case of boron hydride clusters, each boron atom connected to 3 or more vertices has one terminal hydride, while a boron atom connected to two other vertices has two terminal hydrogen atoms. If more hydrogen atoms are present, they are placed in open face positions to even out the coordination number of the vertices.