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A supramolecular zigzag chain of organometallic dipoles mediated by PF6 2- anions
Duarte, M. Teresa; Piedade, M. Fátima M.; Robalo, M. Paula; Teixeira, António P. S.; Garcia, M. HelenaComplex Fe( 5-cyclopentadienyl)(PMe3)[P(OPh)3](4–NCC6H4NO2) [PF6] has been characterized by spectroscopic and X-ray diffraction in order to evaluate the tuning of the electron density at the metal center and the extension ofthe delocalization on the molecule due to the presence of phosphite and phosphine co-ligands. The compound crystallizes in the centrosymmetric space group P21/c which destroys the possibil...
N,N'-Ethylenebis(pyridoxylideneiminato) and N,N'-Ethylenebis(pyridoxylaminato):...
Correia, Isabel; Pessoa, João Costa; Duarte, M. Teresa; Henriques, Rui T.; Piedade, M. Fátima M.; Veiros, Luís F.; Jakusch, Tamás; Kiss, TamásThe Schiff base N,Nprime-ethylenebis(pyridoxylideneiminato) (H2pyr2en, 1) was synthesized by reaction of pyridoxal with ethylenediamine; reduction of H2pyr2en with NaBH4 yielded the reduced Schiff base N,Nprime-ethylenebis(pyridoxylaminato) (H2Rpyr2en, 2); their crystal structures were determined by X-ray diffraction. The totally protonated forms of 1 and 2 correspond to H6L4+, and all protonation constants wer...
Synthesis of new donor/acceptor 5-cyclopentadienyl and 5-indenyliron(II) comp...
Garcia, M. Helena; Robalo, M. Paula; Teixeira, António P. S.; Dias, A. R.; Piedade, M. Fátima M.; Duarte, M. TeresaNew complexes of the type [Fe( 5-Cp or Ind)(L)(L )(p-NCR)][BF4] (L, L =CO, P(OC6H5)3, P(C6H5)3; R=C6H4N(CH3)2, C6H4NO2, (E)-C(H) C(H)C6H4NO2, (E)-C(H) C(H)C6H4N(CH3)2) have been synthesised and characterised. Spectroscopic data were analysed in order to evaluate the tuning of the electronic density at the metal centre and the extension of the -delocalisation on the molecule, due to the presence of coligands w...
Organometallic nickel(II) complexes with substituted benzonitrile ligands. Synt...
Dias, Alberto R.; Garcia, M.Helena; Mendes, Paulo; Piedade, M.Fátima M.; Duarte, M.Teresa; Calhorda, Maria J.; Mealli, Carlo; Wenseleers, W.A new family of organometallic Ni II benzonitrile derivatives bearing strong donor substituents of general formula Ni - C H P C H NCC H R PF R NH , N CH , C H , OCH , H, F has been synthesized. A structural study by X-ray 5 5 6 5 3 6 4 6 2 3 2 6 5 3 diffraction of the compound with R NH showed crystallization on the centrosymmetric monoclinic space group, P2 n, with a quasi 2 1 planar structure of the coordinat...
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