Synthesis and Structural Characterization of Metal Complexes of 2-Formylpyrrole
4N-methylthiosemicarbazone (4ML
1) and 2-Acetyl- pyrrole
4N-methylthiosemicarbazone (4ML
2). The X-Ray Crystal Structures of [Ni(4ML
1-H)
2], [Pd(4ML
1-H)
2] and [Cd(4ML
2)
2I
2]
Ruben Alonso
a, Elena Bermejo
a, Rosa Carballo
b, Alfonso Casti˜neiras
a, and Teresa P´erez
aaDepartamento de Qu´ımica Inorg´anica, Universidad de Santiago de Compostela, E-15706 Santiago de Compostela, Spain
bDepartamento de Qu´ımica Inorg´anica, Facultad de Ciencias, Universidad de Vigo, E-36200 Vigo, Spain
Reprint requests to Prof. Dr. A. Casti˜neiras. Fax: +34 981547163. E-mail: qiac01@usc.es Z. Naturforsch.56 b,219–228 (2001); received January 15, 2001
Thiosemicarbazones, Nickel, Palladium
Reaction of4N-methyl-2-[1-(pyrrol-2-yl)methylidene]hydrazine carbothioamide (4ML1) and
4N-methyl-2-[1-(pyrrol-2-yl)-ethylidene]hydrazine carbothioamide (4ML1) with zinc(II), cad- mium(II) and mercury(II) halides afforded complexes with formulas [M(L)X2] [(L; M; X) = (4ML1; Cd; Cl) (4), (4ML1; Hg; Cl, Br, I) (7-9), (4ML2; Cd; Cl) (17), (4ML2; Hg; Cl, Br, I) (20- 22)] or [M(L)2X2] [(L; M; X) = (4ML1; Zn; Cl, Br, I) (1- 3), (4ML1; Cd; Br, I) (5,6), (4ML2; Zn; Cl, Br, I) (14-16), (4ML2; Cd; Br, I) (18,19)]. Reaction of 4ML1with salts of copper(II), nickel(II), palladium(II) and platinum(II) afforded complexes of formula [M(4ML1-H)2] (10-13). Crystals of11,12and19were studied by X-ray diffractometry, and all new compounds were characterized by elemental analysis, mass spectrometry, and IR, elec- tronic and1H and13C NMR spectroscopy and, when pertinent and allowed by the solubility of the compound,113Cd or199Hg NMR spectroscopy. In the complexes of Group 12 metals, both ligands are neutral and S-monodentate. In the complexes of copper or Group 10 metals, 4ML1
is monodeprotonated and S,N-bidentate.
