Formation of dihelicate and mononuclear complexes from ethane-bridged dimeric bipyridine or phenanthroline ligands with copper(I), cobalt(II), and iron(II) cations

Journal Article · Wed May 01 00:00:00 EDT 1991 · Inorganic Chemistry; (United States)

DOI:https://doi.org/10.1021/ic00009a035· OSTI ID:6106575

Youinou, M T ^[1]; Ziessel, R; Lehn, J M ^[2]

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1. Lab. de Chimie des Metraux de Transition et de Catalyse, Strasbourg (France)
2. Lab. de Chimie Supramoleculaire, Strasbourg (France)

The dimeric ethane-bridged ligands 1,2-bis(6{prime}-methyl-2,2{prime}-bipyridin-6-yl)ethane (1) and 1,2-bis(9-methyl-1,10-phenanthrolin-2-yl)ethane (2) form a double-stranded helicate by complexation with copper(I), yielding the dinuclear complexes (Cu{sub 2}(1){sub 2})(ClO{sub 4}){sub 2} (1a) and (Cu{sub 2}(2){sub 2})(ClO{sub 4}){sub 2} (2a). The double-helical structure, in which two ligands are wrapped around two copper (I) cations, has been assigned by {sup 1}H NMR studies and confirmed in the case of the dinuclear complex 1a by x-ray diffraction. The crystal structure for the complex C{sub 48}H{sub 44}O{sub 8}Cl{sub 2}Cu{sub 2} is reported. The copper cations, which are arranged in a distorted tetrahedral fashion, are separated by a distance of 5.926 (1) {angstrom}. The dinuclear copper complexes with ligands 1 and 2 are oxidized in a single reversible dielectronic wave at potentials somewhat higher than those of mononuclear analogues. Ligand 2 gives a mononuclear cobalt(II) species of octahedral geometry, which has been fully characterized by x-ray diffraction. The crystal structure for the complex C{sub 30}H{sub 22}N{sub 4}O{sub 6}F{sub 6}S{sub 2}Co is reported also. Ligand 3 (1,2-bis(5{prime} methyl-2,2{prime}-bipyridin-5-yl)ethane) leads to a triply bridged dinuclear iron species. 29 refs., 3 figs., 3 tabs.

• OSTI ID: 6106575
• Journal Information: Inorganic Chemistry; (United States), Journal Name: Inorganic Chemistry; (United States) Vol. 30:9; ISSN 0020-1669; ISSN INOCA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
AROMATICS
AZAARENES
AZINES
BIPYRIDINES
CHEMICAL PREPARATION
CHLORATES
CHLORINE COMPOUNDS
COBALT COMPLEXES
COHERENT SCATTERING
COMPLEXES
COPPER COMPLEXES
CRYSTAL STRUCTURE
DATA
DIFFRACTION
EXPERIMENTAL DATA
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
INFORMATION
IRON COMPLEXES
NMR SPECTRA
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PHENANTHROLINES
PYRIDINES
REDOX POTENTIAL
SCATTERING
SPECTRA
SYNTHESIS
TRANSITION ELEMENT COMPLEXES
X-RAY DIFFRACTION