Question

Calculate ean of the central atom in k4fecn6 and crco6 shaala

Answer 1

EAN means metal atomic no. Minus oxidation no.of metal atoms plus 2× coordination number,which is equal to next atomic number.

• In k4(fe(cn)6) , central atom Fe. I..e, 26.
• Oxidation no.=4(x(-1)6) =2
• So Fe is +2
• Coordination no=2×6 =12
• Then EAN =26–2×12 =36
• 36 is stable configuratio