Anion and cation binding by a pendant arm cyclam and its macrobicyclic derivatives.
A series of transition-metal complexes of N,N',N'',N'''-tetra(3-hydroxypropyl)cyclam (L1) are reported. The X-ray structures of the compounds reveal pendant arm coordination of one of the alcohol groups to give square-pyramidal metal centres with simultaneous hydrogen bonding to the counter anions. Ligand L1 has been elaborated to form a series of macrotricyclic derivatives that form 1 ratio 1 complexes with Cu(II) and Ni(II). The X-ray structure of the tetrahydrate and protonated forms of L1 are also reported.
Channa
Asif
A
Dept of Chemistry, King's College London, Strand, London WC2R 2LS, UK.
Steed
Jonathan W
JW