Synthesis, characterisation and NMR study of paramagnetic heteropolinuclear anionic Pt-Co species. Crystal structures of [NBu4]2[{cis-Pt(C6F5)2(C=CSiMe3)2}CoCl2]·0.5(CH3)2CO and [NBu4]2[{Pt(CºCtBu)4}{CoCl2}2].1.5(CH3)2CO

  1. Ara, I. 2
  2. Berenguer, J.R. 1
  3. Forniés, J. 2
  4. Lalinde, E. 1
  1. 1 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

  2. 2 Instituto de Nanociencia y Materiales de Aragón
    info

    Instituto de Nanociencia y Materiales de Aragón

    Zaragoza, España

    ROR https://ror.org/031n2c920

Zeitschrift:
Inorganica Chimica Acta

ISSN: 0020-1693

Datum der Publikation: 1997

Ausgabe: 264

Nummer: 1-2

Seiten: 199-210

Art: Artikel

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DOI: DX.DOI.ORG/10.1016/S0020-1693(97)05606-5 SCOPUS: 2-s2.0-0000666196 WoS: WOS:A1997YE08000021 GOOGLE SCHOLAR

Andere Publikationen in: Inorganica Chimica Acta

Institutionelles Repository: lock_openOpen Access Editor

Zusammenfassung

The reactions of [NBu4]2[cis-Pt(C6F5) 2(C≡CR)2] (R=tBu or SiMe3) with CoCl2·6H2O in a 1:1 molar ratio yielded the paramagnetic binuclear species [NBu4]2[{cis-Pt(C6F5) 2(μ-C≡CR)2}CoCl2] (R=tBu (1a), SiMe, (1b)) in which thecobalt(II) chloride is coordinated η2-side on to both alkynyl ligands of the platinum fragment. Similar treatment of [NBu4]2[Pt(C=CR)4]·2H2O (R=tBu or SiMe3) with CoCl2·6H2O in a 1:2 molar ratio gave the corresponding trinuclear 1:2 adducts [NBu4]2[{Pt(μ-C≡CR)4}{CoCl 2}2] (2). The compounds were characterised by analytical and spectroscopic data and, in addition, the crystal structures of a representative complex of each category were determined: 1b·acetone and 2a·acetone. Surprisingly, whilst in the binuclear anion [{Pt(C6F5)2(C≡CSiMe3) 2}CoCl2]2- the cobalt atom is well embedded by the alkynyl fragments giving a precisely planar PtC4Co core and a very long Pt⋯Co separation (3.446(3) Å), in the trinuclear derivative [{Pt(C≡CtBu)4}{CoCl2}2] 2- the PtC4Co cores are hinged imposing significantly shorter Pt⋯Co distances (3.077(3) Å). © 1997 Elsevier Science S.A.