Boron generally forms:
Electron-deficient compound
Does not form any compound at all
Electron rich compound
Electron precise compound
Boron generally forms electron deficient compound in which it lacks one electron pair to complete it octet and acts as Lewis acid.
What do you understand by (i) electron-deficient, (ii) electron-precise, and (iii) electron-rich compounds of hydrogen? Provide justification with suitable examples.