Which of the following complex can act as an oxidising agent as well as reducing agent?

1. Ti(CO)6; EAN of Ti=22−0+6×2=34Hence can only act as oxidising agent. 2. Mn(CO)5; EAN of Mn=25−0+5×2=35Hence can only act as oxidising agent. 3. Mn(CO)6; EAN of Mn=25−0+6×2=37Hence can only act as reducing agent.Note : in a redox reaction the oxidising agent accepts electrons ,gets reduced and for this EAN value should be low for the complex. if EAN is more the complex acts as Reducing agent by donating electrons.