Chemistry · Coordination Chemistry

The second-order rate constants for the outer-sphere self-exchange electron transfer reactions for [Ru(NH 3 ) 6 ] 2+ /[Ru(NH 3 ) 6 ] 3+ and [Co(NH 3 ) 6 ] 2+ /[Co(NH 3 ) 6 ] 3+ are 9.2 × 10 2 M -1 s -1 and ≤ 10 -9 M -1 s -1 , respectively. The correct rationale for this data is:

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1the change in the number of σ*-electrons in the Ru(II)/Ru(III) system.
2the change in the number of both σ* and π*-electrons in the Co(II)/Co(III) system.
3the change in the number of π*-electrons in the Co(II)/Co(III) system.
4the change in the number of σ*-electrons in the Co(II)/Co(III) system.✓

Correct answer

the change in the number of σ*-electrons in the Co(II)/Co(III) system.

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The second-order rate constants for the outer-sphere self-exchange electron transfer reactions for [Ru(NH 3 ) 6 ] 2+ /[Ru(NH 3 ) 6 ] 3+ and [Co(NH 3 ) 6 ] 2+ /[Co(NH 3 ) 6 ] 3+ are 9.2 &times; 10 2 M -1 s -1 and &le; 10 -9 M -1 s -1 , respectively. The correct rationale for this data is: