The Synthesis and Characterization of the Novel Pseudo-Octahedral Complex bis[(2-hydroxybenzyl) - (2-methylpyridyl)-amine] zinc(II), [Zn(bpa)2].2H2O as a Model for Astacin

نویسندگان

  • Ademir Neves
  • Ivo Vencato
  • Cláudio Nazari Verani
چکیده

A reação en tre o ligante (2-hidroxibenzil)(2-metilpiridil) amina (Hbpa) e Zn(OAc)2.2H2O (estequiometria 2:1), em solução metanólica, rendeu cristais incolores de [Zn(bpa)2]. A estrutura cristalina do complexo foi determinada por difração de raios-X, no sistema cristalino triclínico, grupo espacial P 1 (No. 2) e dimensões de cela a = 9,504(1), b = 11,984(1) c = 11,966(1)Å, α = 79,36(2), β = 89,18(2), γ = 78,95(2) , V = 1314,2(2) Å, Z = 2, Dcalc = 1,334 Mg m, λ(MoKα) = 0,71073 Å, μ = 0,991 mm, F(000) = 552, T = 296 K, R = 7,1% (Rw = 11,0%), com 4846 reflexões medidas, 3247 reflexões observadas com I > 3σ(I) e 326 parâmetros refinados. A geometria de coordenação em torno do Zn(II) é pseudo-octaédrica com as unidades tripodais do ligante (bpa) coordenadas facialmente. Segundo nosso conhecimento, [Zn(bpa)2].2H2O representa o primeiro exemplo estrutural de um complexo octaédrico de Zn que contém fenolato na sua esfera de coordenação.

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تاریخ انتشار 2002