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Late first-row transition metal complexes of a 17-membered piperazine-based macrocyclic ligand: structures and magnetism

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F20%3A73603262" target="_blank" >RIV/61989592:15310/20:73603262 - isvavai.cz</a>

  • Alternative codes found

    RIV/00216208:11310/20:10413888

  • Result on the web

    <a href="https://pubs.rsc.org/en/content/articlehtml/2020/dt/d0dt01392g" target="_blank" >https://pubs.rsc.org/en/content/articlehtml/2020/dt/d0dt01392g</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1039/d0dt01392g" target="_blank" >10.1039/d0dt01392g</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Late first-row transition metal complexes of a 17-membered piperazine-based macrocyclic ligand: structures and magnetism

  • Original language description

    A 17-membered piperazine-based macrocyclic ligandL(diProp)(1,5,13,17,22-pentaazatricyclo[15.2.2.17,11]docosa-7,9,11(22)-triene) was resynthesized in high yield by using a linear pump. Its Mn(ii), Fe(ii), Co(ii) and Ni(ii) complexes of the general formula [MnLdiProp(ClO4)(2)] (1), [FeLdiProp(CH3CN)](ClO4)(2)(2), [CoLdiProp(CH3CN)](ClO4)(2)(3), [NiLdiProp](ClO4)(2)(4) were prepared and thoroughly characterized. X-ray diffraction analysis confirmed that Mn(ii) complex1has capped trigonal prismatic geometry with a coordination number of seven, Fe(ii) and Co(ii) complexes2and3are trigonal prismatic with a coordination number of six and Ni(ii) complex4has square pyramidal geometry with a coordination number of five. The decrease of the coordination number is accompanied by a shortening of M-N distances and an increase of torsion of the piperazine ring from the equatorial plane. Magnetic measurement reveals moderate anisotropy for4and rather large magnetic anisotropy for2and3(axial zero-field splitting parameterD(Ni) = 9.0 cm(-1),D(Fe) = -14.4 cm(-1),D(Co) = -25.8 cm(-1), together with rather high rhombicity). Co(ii) complex3behaves as a field-induced SMM with a combination of Raman and direct or Orbach and direct relaxation mechanisms. Obtained magnetic data were extensively supported by theoretical CASSCF calculations. The flexibility and rather large 17-membered macrocyclic cavity of ligandL(diProp)could be responsible for the variation of coordination numbers and geometries for the investigated late-first row transition metals.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10402 - Inorganic and nuclear chemistry

Result continuities

  • Project

  • Continuities

    S - Specificky vyzkum na vysokych skolach

Others

  • Publication year

    2020

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Dalton Transactions

  • ISSN

    1477-9226

  • e-ISSN

  • Volume of the periodical

    49

  • Issue of the periodical within the volume

    26

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    13

  • Pages from-to

    9057-9069

  • UT code for WoS article

    000552458700025

  • EID of the result in the Scopus database

    2-s2.0-85088042098