Mono- and dinuclear high-spin half-sandwich manganese(II) complexes containing acetylide and TMEDA ligands

Sohrab Kheradmandan, Thomas Fox, Helmut W. Schmalle, Koushik Venkatesan, Heinz Berke*

*Corresponding author for this work

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17 Citations (Scopus)

Abstract

The d5 high-spin MnII half-sandwich complexes [Mn(C≡CR)(MeC5H4)(tmeda)] (R = SiMe3 2, Ph 3; tBu 4; C≡CSiMe3 5; C=CPh 6; tmeda = N,N,N′, N′-tetramethylethylenediamine) were prepared by the reaction of [Mn(MeC5H4)2(tmeda)] (1) with 1 equiv. of the corresponding acetylene or the trimethyltin acetylide. The dinuclear complexes [Mn(C≡C-C≡CSiMe3)2(tmeda)]2 (7) and [Mn2-(MeCp)21-tBuC≡C) 21-tmeda)] (8), which contain Mn-Mn bonds, were synthesized by treating 1 with an excess of HC≡C-C≡CSiMe3 or HC≡CtBu, respectively. Dinuclear complexes of the type [(MeC 5H4)(tmeda)MnC≡C-X-C≡CMn(tmeda)(C 5H4Me)] [X = 1,3-C6H4 9; 1,4-C 6H4 10; 4,4′-(C6H4) 2 11] were obtained by treatment of 1 with 0.5 equiv. of the corresponding acetylides 1,3-C6H4-(C≡CSnMe 3)2, 1,4-C6H4(C≡CSnMe 3)2 and 4,4′-(C6H4) 2-(C≡CSnMe3)2 in benzene for 24 h to yield the corresponding dinuclear complexes in very good yields. All the mono- and dinuclear compounds have been characterized by NMR, IR, Raman spectroscopy and elemental analyses. X-ray diffraction studies have been performed on complexes 3 and 5-11.

Original languageEnglish
Pages (from-to)3544-3554
Number of pages11
JournalEuropean Journal of Inorganic Chemistry
Issue number17
DOIs
Publication statusPublished - 6 Sep 2004
Externally publishedYes

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Keywords

  • Alkyne ligands
  • Cyclopentadienyl ligands
  • Half-sandwich complexes
  • Molecular devices
  • N ligands

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