In this type of questions, two statements I and Il are given. Mark the correct choice as:
Statement I : Boron compounds, especially the hydrides are usually referred to as electron-deficient compounds.
Statement II : Boron compounds behave as Lewis acids.
Text Solution
Verified by ExpertsA
Since boron forms three covalent bonds, so in the compounds of boron, the central B atom
has only a sextet of electrons and thus needs two more electrons to complete its octet. So boron compounds are reffered to as electron deficient compounds. Due to this reason B readily accepts electrons from other molecules which can donate a pair of electrons. Thus boron compounds behave as Lewis acids. For example, 
combines with Lewis base 
to form 
.
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