Draw the crystal-field energy-level diagrams and show the placementof d electrons for each of the following:
(a) [Cr(H2O)6]2 + (four unpaired electrons),
(b) [Mn (H2O)6]2+ (high spin),
(c) [Ru (NH3) 5H2O]2+ (low spin),
(d) [IrCI6]2- (low spin),
(e) [Cr (en)3]3+ ,
(f) [Nif6]4-.