Template Synthesis of Symmetrical Transition Metal Dithiocarbamates

نویسندگان

  • Khwaja S. Siddiqi
  • Shahab A. A. Nami
  • Yonas Chebude
چکیده

Novos ditiocarbamatos de metais de transição do tipo [M 2 (etdtc) 2 ] e [M(etdtc)Cl] 2 [M = Mn(II), Fe(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II) e Hg(II), M = Cr(III), Fe(III) e etdtc = (S 4 N 4 C 11 H 18 )] foram sintetizados por meio de técnicas de automontagem. Os ditiocarbamatos metálicos foram preparados a partir da amina primária, CS 2 e cloreto metálico. Foram caracterizados por técnicas espectroscópicas, TGA/DSC, susceptibilidade magnética e dados de condutividade. Sugere-se que os complexos [Mn 2 (etdtc) 2 ], [Fe 2 (etdtc) 2 ], [Co 2 (etdtc) 2 ], [Zn 2 (etdtc) 2 ], [Cd 2 (etdtc) 2 ] e [Hg 2 (etdtc) 2 ] tenham geometria tetraédrica, e [Ni 2 (etdtc) 2 ] e [Cu 2 (etdtc) 2 ], quadrática plana. Os complexos [Cr(etdtc)Cl] 2 e [Fe(etdtc)Cl] 2 contêm ligantes cloro em ponte e possuem geometria octaédrica distorcida. Em todos os casos, o ligante ditiocarbamato encontra-se ligado simetricamente. No perfil da curva TG são observados três estágios para todos os complexos, levando à formação dos respectivos sulfetos metálicos como produtos finais. A condutância molar de soluções dos complexos em DMSO de concentração 10 mol L confirma sua natureza não iônica.

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تاریخ انتشار 2006