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Synthesis and non-conventional structure of square-planar Pd(II) and Pt(II) complexes with an N,C,N-chelated stibinidene ligand
Authors: Kořenková Monika | Hejda Martin | Stepnicka Petr | Uhlik Filip | Jambor Roman | Růžička Aleš | Dostál Libor
Year: 2018
Type of publication: článek v odborném periodiku
Name of source: Dalton Transactions
Publisher name: Royal Society of Chemistry
Place: Cambridge
Page from-to: 5812-5822
Titles:
Language Name Abstract Keywords
cze Syntéza a struktura Pd(II) a Pt(II) komplexů obsahující stibinidenový ligand Byly připraveny sloučeniny ArSb (Ar = C6H3-2,6-(CH=NtBu)(2)) které reagují s Pt(II) a Pd komplexy. Syntéza; struktura; PdII; PtII; komplexů; obsahující; stibinidenový; ligand
eng Synthesis and non-conventional structure of square-planar Pd(II) and Pt(II) complexes with an N,C,N-chelated stibinidene ligand The N,C,N-chelated stibinidene, ArSb (Ar = C6H3-2,6-(CH=NtBu)(2)), reacts with Pt(ii) compounds [PtCl2L2] resulting in the formation of 1:1 complexes, cis-[PtCl2L(ArSb)] (L = Me2S (1), dmso (2)). In contrast, attempts to synthesize similar Pd(ii) complexes failed, resulting only in the formation of elemental palladium. To increase the stability of the ArSb complexes, in particular those containing Pd(ii), the simple auxiliary ligands were replaced with C,N-chelating ones, which led to a set of four compounds of the type [RMCl(ArSb)], where R = C6H4-2-(CH2NMe2) or Fe(eta(5)-C5H4)(eta(5)-C5H3-2-(CH2NMe2)) and M = Pd (3, 5) or Pt (4, 6). Compounds 1-6 were characterized by H-1 and C-13{H-1} NMR spectroscopy and single-crystal X-ray diffraction analysis, and in the case of ferrocene derivatives 5 and 6, also by cyclic voltammetry. Compounds 2-6 were shown to form rotamers in solution due to the side-on coordination of the ArSb ligand and a hindered rotation around the Sb-Pd(Pt) bond. This process was investigated by H-1-VT-NMR spectroscopy and by DFT computations. cross-coupling reactions; coordination chemistry; palladium complexes; c-c; activation; arsine; models; anions; bonds; core

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