Palladium and platinum dihalides react with DL-selenomethionine (sem), yielding the complexes [M(sem)X-2](M = Pd,X = Cl or Br;M = Pt,X = Cl) and, in the presence of N,N-dimethylformamide (dmf), the species [M(sem)X-2].dmf (M = Pd, X = I: M = Pt, X = Cl, Br or I). The complexes were characterized by i.r, and proton n.m.r. spectroscopy and by thermogravimetric analysis, and their properties were compared with those of the DL-methionine analogues [M(Met)Cl-2] and [Pt(Met)Cl-2].dmf. On the basis of n.m.r. data in deuteriated dimethyl sulfoxide, the platinum complexes undergo ligand rearrangement to form [Pt(sem)(2)](2+) moieties whereas the solvent does not seem to interact with the palladium coordination sphere, which contains the chelated N, Se ligand.
Palladium and platinum dihalide complexes with DL-selenomethionine
FARAGLIA, GIUSEPPINA;FREGONA, DOLORES;
1997
Abstract
Palladium and platinum dihalides react with DL-selenomethionine (sem), yielding the complexes [M(sem)X-2](M = Pd,X = Cl or Br;M = Pt,X = Cl) and, in the presence of N,N-dimethylformamide (dmf), the species [M(sem)X-2].dmf (M = Pd, X = I: M = Pt, X = Cl, Br or I). The complexes were characterized by i.r, and proton n.m.r. spectroscopy and by thermogravimetric analysis, and their properties were compared with those of the DL-methionine analogues [M(Met)Cl-2] and [Pt(Met)Cl-2].dmf. On the basis of n.m.r. data in deuteriated dimethyl sulfoxide, the platinum complexes undergo ligand rearrangement to form [Pt(sem)(2)](2+) moieties whereas the solvent does not seem to interact with the palladium coordination sphere, which contains the chelated N, Se ligand.
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