AVALIAÇÃO DE ARRANJOS SUPRAMOLECULARES DE COMPLEXOS TRIAZENIDOS DE MERCÚRIO(II) E COBRE(II) / EVALUATION OF SUPRAMOLECULAR ARRANGEMENTS OF TRIAZENIDE COMPLEXES OF MERCURY(II) AND COPPER(II).

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

The reaction between deprotonated 1,3-Bis(3-acetylphenyl)triazene and Hg(CH3COO)2 in methanol, yields [Hg(RNNNR)(Py)] (R=3-CH3C(O)C6H4) (1), a triazenide dimeric mononuclear complex of mercury(II). The crystal structure analysis of (1) reveals a bi−dimensional supramolecular arrangement as result of molecular self-assembly provided by Hg−η, η −arene π interactions, and C−HO non−classical hydrogen bonding. The crystal system of (1) is monoclinic and belongs to the space group P21/c with the cell parameters a = 13,8647(5), b = 14,8823(5), c = 17,0403(5) Å, and β = 92,2140(10). The crystal structure refinement achieves the final indexes R1 = 0,0440 and wR2 = 0,1034. Deprotonated 1,3-Bis(3-acetylphenyl)triazene reacts with Cu(CH3COO)22H2O in methanol yielding [Cu(RNNNR)2]2 (R = 3−CH3C(O)C6H4) (2), a binuclear triazenide complex showing a lantern−type molecular structure. The crystal structure of (2) reveals that molecules of the complex do not suffer intermolecular interactions. The CuCu distance [2,4056(9)Å] give rise to the interpretation of an inter-metallic interaction supported by an anti−ferromagnetic coupling between the Cu(II) ions. The crystal system of (2) is triclinic and belongs to the space group P(-1) with the cell parameters a = 10,1977(11), b = 15,5390(19), c = 19,173(2) Å, α = 92,960(3), β = 90,484(4), and у = 100,997(3). The crystal structure refinement achieves the final indexes R1 = 0,0572 and wR2 = 0,1197. Beside the single−crystal X−ray structural analysis, both the complexes of (1) and (2) were characterized by infra-red vibrational spectroscopy and UV/VIS electronic transition spectroscopy.

ASSUNTO(S)

complexos triazenídos téctons de hg(ii) triazenos quimica

ACESSO AO ARTIGO

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