Chirality at octahedral centres determined by tetradentate Schiff base ligands - 27/03/15
, Mostafa Riahi Farsani b, Santo Lanza c, Giuseppe Bruno c, Bahram Yadollahi aBenvenuto su EM|consulte, il riferimento dei professionisti della salute.
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Abstract |
1,2-bis(2′-aminophenoxy)-4-methylbenzene provides a Schiff base by reaction with 2-pyridinecarboxaldehyde. The stereochemical rigidity of ortho-aminophenyl diamines causes this latter, as well as the corresponding nitro precursors, be chiral. The chiral conformation of the diamine precursor is maintained in the octahedral zinc(II) and cobalt(II) complexes prepared from the Schiff base. The crystal structures of [ZnL(NO3)(H2O)]NO3 and CoLCl2 complexes exhibit non-planar cis-α configurations with both enantiomers (Δ and Λ). This implies that in the Schiff base ligand the two α-diimine systems shape an octahedral cavity having the same chirality of the precursory diamine.
Il testo completo di questo articolo è disponibile in PDF.Keywords : Syntheses, Chirality, Schiff base, DFT, Crystal structure
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Vol 18 - N° 4
P. 391-398 - aprile 2015 Ritorno al numero
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