Determining the site of reduction of 4-NO2-2,2 '-bipyridine and [Pt(4-NO2-2,2 '-bipyridine)Cl-2]

Paul Murray, Lorna Jack, Eric J. L. McInnes, Lesley J. Yellowlees

Research output: Contribution to journalArticlepeer-review


In situ UV/Vis and EPR spectroelectrochemistry experiments show that the unpaired electron in [4-NO2-bpy](1-) sits in an orbital which is based on the 4-NO2-py moiety and not spread over both py rings. The unpaired electron in [Pt(4-NO2-bpy)Cl-2](1-) is based on the 4-NO2-bpy ligand with some [bpy](1-) character. Labelling the NO2 group of 4-NO2-bpy with N-15 revealed that the larger coupling constant in the EPR spectrum of [4-NO2-bpy](1-) can be assigned to the N atom of the NO2 group. This coupling constant is significantly smaller in the EPR spectrum of [Pt(4-NO2-bpy)Cl-2](1-).

Original languageEnglish
Pages (from-to)4179-4185
Number of pages7
JournalDalton Transactions
Issue number17
Publication statusPublished - 2010


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