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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995), S. 1199-1205 
    ISSN: 0009-2940
    Keywords: Copper(I) complexes ; Copper(II) complexes ; N,S-Donor ligands ; Macrocyclic ligands ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The synthesis and characterization of seven copper coordination compounds with the 14-membered macrocyclic cis-N2S2 dibenzo ligand 6,7,13,14,15,16,17,18-octahydrodibenzo[e,m]-[1,4,8,11]dithiadiazacyclotetradecine (L1) and its N,N'-bisacetato and -bis(methylpyridyl) functionalized derivatives H2L2 and L3 are described. The structures of five compounds were determined by single-crystal X-ray diffraction. The tetrahedrally distorted square-planar coordination geometry of [CuL1](ClO4)2 (1) changes upon reduction of copper to a severely distorted tetrahedral geometry in [CuL1]Br · MeCN (2). The Cu-N bond lengths increase from 1.988(3) to 2.029(5) Å; the Cu-S bond lengths decrease from 2.293(1) to 2.255(2) Å. Copper(II) is hexacoordinated in [CuHL2]HSO4 · 2.5 H2O (5) and [CuHL2]ClO4 · H2O (6). Both compounds exhibit very similar overall structures in the cationic part. The macrocyclic ring of the ligand is folded along an N⃜S axis, the octahedral geometry is strongly Jahn-Teller distorted, with O and S donor atoms in the apical positions. Compound 5 contains one very short [2.271(3) Å] and one long [2.701(3) Å] Cu-S (thioether) bond. In [CuL3](ClO4)2 · 2 H2O (7) one thioether group of the ligand L3 remains uncoordinated. The coordination polyhedron is rather irregular: Cu-S 2.506(3) and Cu-N 1.960(7)-2.107(8) Å. The compounds were further characterized by electronic and EPR spectroscopy and by cyclic voltammetry. Some relationships to the structural and spectroscopic properties of “blue” copper proteins were found.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0044-2313
    Keywords: Complexes of Acyclic and Macrocyclic Sulfoxides ; Crystal Structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Complexes of Acyclic and Cyclic Sulfoxides. The Crystal Structures of CuII, NiII, PdII and PtII Complexes of 3-Thia-1,5-diaminopentane-S-oxide and 1-Thia-4,7-diazacyclononane-S-oxideThe macrocyclic ligand 1-thia-4,7-diazacyclononane-S-oxide (tasno) and the analogue acyclic ligand 3-thia-1,5-diaminopentane-S-oxide (daeso) have been prepared. Their reaction with the respective metal salts yielded the following compounds: [Ni(daeso)2](PF6)2 (1), [Pd(daeso)2](PF6)2 (2), [Cu(daeso)2]Cl2 (3), [Cu(daeso)2](ClO4)2 (4), [Cu(tasno)2]Br· 2 H2O (5), [Ni(tasno)2](ClO4)2 (6), [Pd(tasno)2]Br· H2O (7) and [Pt(tasno)2]Br· H2O (8). The structures of 1 and 4-8 have been determined by X-ray crystallography. In 4 and 5 CuII shows a Jahn-Teller distorted trans-N4O2 coordination, with O-donation of the sulfoxide group. O-donation of the SO-groups occurs also in the NiII complexes 1 and 6, giving a cis-N4O2 coordination sphere in 1 and a trans-N4O2 sphere in 6. In 7 the sulfur atom of the SO group is weakly interacting with the metal center in apical positions, whereas in 8 the sulfoxide group is directed away from the PdII ion. Metal to ligand distances in the complexes of tasno are shorter than in the complexes of daeso.
    Notes: Durch Oxidation von 1-Thia-4,7-diazacyclononan und 3-Thia-1,5-diaminopentan wurden der makrocyclische Ligand 1-Thia-4,7-diazacyclononan-S-oxid (tasno) und der entsprechende offenkettige Ligand 3-Thia-1,5-diaminopentan-S-oxid (daeso) dargestellt. Umsetzungen mit CuII-, NiII-, PdII- und PtII-Salzen ergaben die Komplexe [Ni(daeso)2](PF6)2 (1), [Pd(daeso)2](PF6)2 (2), [Cu(daeso)2]Cl2 (3), [Cu(daeso)2](ClO4)2 (4), [Cu(tasno)2]Br· 2 H2O (5), [Ni(tasno)2](ClO4)2 (6), [Pd(tasno)2]Br· H2O (7) und [Pt(tasno)2]Br· H2O (8). Die Strukturen von 1 und 4-8 wurden röntgenographisch anhand von Einkristallen ermittelt. In 4 und 5 ist CuII verzerrt oktaedrisch trans-N4O2 koordiniert, d. h. die Sulfoxidgruppen von tasno und daeso sind über die Sauerstoffatome gebunden. Dies ist auch in 1 und 6 der Fall, doch ist NiII in 1 cis-N4O2, in 6 dagegen trans-N4O2 koordiniert. In 7 besteht zusätzlich zur planaren PdN4-Koordination eine schwache Wechselwirkung zwischen Metallzentrum und dem Schwefelatom der Sulfoxidgruppe. In 8 ist die Sulfoxidgruppe vom Metallzentrum weggeklappt. Die Metall-Ligand-Abstände sind in den Komplexen des makrocyclischen Liganden tasno kürzer als in den Komplexen des offenkettigen Liganden daeso.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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