(a) What type of semiconductors are formed by doping silicon with boron or gallium? Using simple band theory, explain how the semiconducting properties of Si are altered by doping with B or Ga.

(b) An active area of research within the field of Ga³⁺ and In³⁺ coordination chemistry is the search for complexes suitable for use as radiopharmaceuticals. Suggest how ligands 13.51 and 13.52 are likely to coordinate to Ga³⁺ and In³⁺ respectively.

Transcribed Image Text:

S N S N (13.51) N s 0₂C H N N Z (13.52) CO₂ CO₂