Abstract
The N,C,N′-bonded arylruthenium 2,2′:6′,2′′-terpyridine (tpy) complex salts [Ru(NCN)(tpy)](Cl) ([1a](Cl), NCN ) 2,6-bis[(dimethylamino)methyl]phenyl) and [Ru(N∧C∧N)(tpy)](PF6), ([2a](PF6), N∧C∧N ) 2,6-bis(2-pyridyl)phenyl) can be halogenated under very mild conditions by oxidation with copper(II) halogen salts. Halogenation occurs exclusively para to the site of metalation and yields the cations [Ru(4-RNCN)( tpy)]+ (R ) Cl, [1b]+
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