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Isolation and characterization of the first circular single-stranded polymetallic lanthanide-containing helicate
Jean-Michel Senegas1, Sylvain Koeller, Gerald Bernardinelli
1Department of Inorganic Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland.
Chemical Communications (Cambridge, England)
|April 28, 2005
Abstract:
A thorough examination of the disassembly of bimetallic triple-stranded lanthanide helicates [Ln2(Li)3]6+ (stoichiometry S = m/n = 2/3 = 0.67, global complexity GC = m + n = 2 + 3 = 5) in excess of metals shows the competitive formation of standard linear bimetallic complexes [Ln2(Li)2]6+ (S= 1.0, GC = 4), and circular trimetallic single-stranded helicates [Ln3(Li)3]9+ (S= 1.0, GC = 6).