Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Synthesis and Characterization of Copper(II) Complexes of a 14-Membered cis-N2S2 Dibenzo Macrocycle and of Its Bis-acetato and Bis(methylpyridyl) Derivatives (1995)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995), S. 1199-1205 
    Details
    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
    URL: http://dx.doi.org/10.1002/cber.19951281211
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Synthese und Struktur der Cobalt(III)-Komplexe 14gliedriger cis- und trans-N2S2-Dibenzomakrocyclen mit zwei koordinierenden AcetatogruppenProfessor Wolfgang Sawodny zum 60. Geburtstage gewidmet (1994)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 796-800 
    Details
    ISSN: 0044-2313
    Keywords: Cobalt(III) complexes functionalized N2S2-macrocyclic ligands ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Structure of Cobalt(III) Complexes of 14-Membered cis- and trans-N2S2 Dibenzo Macrocycles with two Pendant Acetato GroupsThe isomeric fourteen membered macrocyclic ligands 6,7,9,15,16,18-hexahydrodibenzo[f,m][1,8]dithia[4,11]diazacyclotetradecine-8,17-diacetic acid-0.5-hydrate (H2L3), C22H26N2O4S2 · 0.5 H2O and 6,7,13,15,16,18-hexahydrodibenzo-[e,m][1,4]dithia[8,11]diazacyclotetradecine-14,17-diacetic acid-1.5-hydrate (H2L6), C22H26N2O4S2 · 1.5 H2O with cis- and trans-N2S2 donorsets and two pendant acetato groups form the stable complexes [Co(L3)]ClO4 · 2 H2O (1) and [Co(L6)]ClO4 · H2O (2). Co(III) is octahedrally coordinated herein to all six donor centers of the respective ligand. The macrocyclic rings are folded. The metal ions are located outside the macrocyclic cavity. The mean Co—N, Co—O and Co—S distances are 196, 190 and 224 pm, respectively.Crystal data: 1, monoclinic, space group C2/c, a = 3 797.7(9), b = 763.8(3), c = 2 207.0(7) pm, β = 123.17(2), Z = 8, 3 445 reflections, R(Rw) = 0.072(0.070); 2, monoclinic, space group C2/c, a = 3 197.1(6), b = 880.4(2), c = 1 890.6(4) pm, β = 112,19(3)°, Z = 8, 4 415 reflections, R(Rw) = 0.062(0.064).
    Notes: Die beiden isomeren Liganden 6,7,9,15,16,18-Hexahydrodibenzo[f,m][1,8]dithia[4,11]diazacyclotetradecin-8,17-diessigsäure-0,5-hydrat (H2L3), C22H26N2O4S2 · 0,5 H2O bzw. 6,7,13,15,16,18-Hexahydrodibenzo[e,m][1,4]dithia-[8,11]diazacyclotetradecin-14,17-diessigsäure-1,5-hydrat (H2L6), C22H26N2O4S2 · 1,5 H2O mit cis- bzw. trans-N2S2-Donorzentren im vierzehngliedrigen makrocyclischen Ring und zwei Acetat-Seitenketten bilden die stabilen Komplexe [Co(L3)]ClO4 · 2H2O (1) und [Co(L6)]ClO4 · H2O (2). CoIII ist jeweils von allen 6 Donorzentren der Liganden oktaedrisch umgeben. Die Liganden sind gefaltet. Die Metallatome liegen außerhalb der makrocyclischen Kavität.Kristalldaten: 1, monoklin, Raumgruppe C2/c, a = 3 797,7(9), b = 763,8(3), c = 2 207,0(7) pm, β = 123,17(2)°, Z = 8, 3 445 Reflexe, R(Rw) = 0,072(0,070); 2, monoklin, Raumgruppe C2/c, a = 3 197,1(6), b = 880,4(2), c = 1 890,6(4) pm, β = 112,19(3)°, Z = 8, 4415 Reflexe, R(Rw) = 0,062(0,064).
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19946200506
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...