Question

Co acts as a ????-donor and ????-acceptor ligand in metal carbonyls. Explain.

Answer 1

Acceptorrrrrrrrrrrrrrrrrrrr

Answer 2

$\sf{Your \: answer \: is } \red{ \: " Acceptor "}$

It has the ability by which it can accept an electron from neighbouring atom as it has a vacancy of electron. Thus is called acceptor impurity. So, the presence of excess positive charge forms the p-type region. Thus acceptor impurity is used to form p-type semiconductors.