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Organometal coordination by purines: Semi-chelate bonding of modified guanine and isocaffeine with bis(diorganylphosphino)ferrocene-copper

, , , , , , and . Journal of Organometallic Chemistry, (2015)
DOI: 10.1016/j.jorganchem.2014.10.043

Abstract

The (dopf)Cu+ complex fragments (dopf = 1,1'-bis(diorganylphosphino)ferrocenes) can bind to the bidentate O:C-C-N function provided by isocaffeine (1,3,9-trimethylxanthine) and guanine heterocyclic systems in a variable semi-chelate coordination arrangement. Crystal structures reveal that the strong bond between Cu and N is complemented by a weak interaction between the O atom and Cu(I). While the ferrocene oxidn. behavior is conventional and not much different from that of related complexes of (dopf)Cu+ with lumazines, the structural variability of purine ligand coordination is unique and its implications are discussed. on SciFinder(R)

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