A síntese de alguns complexos de rutênio(II) contendo os ligantes 2-cloro-1,3,2-dioxafosfolano e 2-cloro-4,5-benzo-1,3,2-dioxafosfolano são apresentadas pela primeira vez. As reações do dicloro-tris(trifenilfosfino)rutênio(II) com os ligantes em questão produziram sempre um complexo contendo duas moléculas de dioxafosfolano, independente da estequiometria empregada. Já os complexos derivados do cloro(ciclopentadienil)bis(trifenilfosfino)rutênio(II) têm apenas um ligante em sua estrutura. Os complexos foram caracterizados por RMN de 31P{¹H} e ¹H.

Syntheses of some ruthenium(II) complexes containing 2-chloro-1,3,2-dioxaphospholane and 2-chloro-4,5-benzo-1,3,2-dioxaphospholane are reported for the first time. The reaction of dichloro-tris(triphenylphosphane)ruthenium(II) with these ligands always leads to formation of a product containing two molecules of dioxaphospholane, independently of the stoichiometric proportion employed. On the other hand, complexes derived from chloro(cyclopentadienyl) bis (triphenylphosphane)ruthenium(II) have only one ligand in their structure. The complexes were characterized by 31P{¹H} and ¹H-NMR spectroscopy.

A new method for the preparation of 2-chloro-1,3,2-dioxaphospholane (1) and 2-chloro-4,5-benzo-1,3,2-dioxaphospholane (2), are reported. The modifications introduced in the synthetic route improved the yield and facilitated the control of reaction, but the synthesis require longer reaction time. The compounds were characterized by ¹H, 13C{¹H} and31P{¹H} NMR spectroscopy. Due to the complexity of the spin system AA'BB'X (A, A', B, B' = ¹H; X = 31P) of 2, a simulation of the ¹H NMR spectra was done and it's in agreement with the bibliography.

The synthesis of several mono- and bimetallic platinum and palladium complexes are reported. The monometallic complexes are of the type MCl2(PEt3)2L (L=2-aminothiazol; benzothiazol; 2-imidazolidithione; M=Pt; Pd), and the bimetallic complexes (M2Cl4(PEt3) 2L) are derived from them. Infrared spectroscopic characterization of the monometallic complexes shows that the metal centre are coordinated through the N-endocyclic (L=2-aminothiazol; benzothiazol) and through the sulphur when L=2-imidazolidithione. Coordination of a second metal fragment occurs via the sulphur atom (L=2-aminothiazol; benzothiazol) according to infrared studies. 31P{¹H} NMR spectroscopy suggest that the complexes have a cis- configuration since the ¹J Pt-P are around the value found for this type of compound.