Subject: Inorganic Chemistry · Chapter: Coordination Chemistry · Topic: Electron Transfer Redox · Exam: NET JUNE 2011 · Marks: 2 · Difficulty: Easy
Consider two redox pairs: (1) Cr(II)/Ru(III) (2) Cr(II)/Co(III) The rate of acceleration in going from a outer-sphere to a inner-sphere mechanism is lower for (1) relative to (2). Its correct explanation is
(a)HOMO/LUMO are $\sigma^{*}$ and $\sigma^{*}$ respectively.
(b)HOMO/LUMO are $\sigma^{*}$ and $\pi^{*}$ respectively.
(c)HOMO/LUMO are $\pi^{*}$ and $\sigma^{*}$ and respectively.
(d)HOMO/LUMO are $\pi^{*}$ and $\pi^{*}$ respectively.