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Boletín de la Sociedad Chilena de Química

versão impressa ISSN 0366-1644

Resumo

SANHUEZA, JULIO; CONTRERAS, RAUL  e  VALDERRAMA, MAURICIO. RHODIUM(III) AND RUTHENIUM(II) COMPLEXES WITH THE CHIRAL PHOSPHINE-ALCOHOL Ph2PCH2CHMeCH2OH: SYNTHESIS AND CHARACTERISATION. Bol. Soc. Chil. Quím. [online]. 2002, vol.47, n.3, pp. 227-233. ISSN 0366-1644.  http://dx.doi.org/10.4067/S0366-16442002000300005.

Reaction of the dinuclear complex [{(h5-C5Me5)RhCl} 2(µ-Cl)2] with the chiral phosphine (R)-Ph2PCH2CHMeCH2 OH leads to the complex [{(h5-C5Me5)RhCl 2(h1-Ph2PCH2 CHMeCH2OH-P)](1). This reaction, in the presence of AgBF4, yields the cationic compound [{(h5-C5Me5)RhCl(h 2- Ph2PCH2CHMeCH2OH-P,O)]BF 4(2). Variable-temperature 1H NMR and circular dichroism experiments support the stereoselective h2-chelate coordination of the ligand and the proposed configuration for the metal centre. In a similar way, the reaction of the dimer [{(h6-C6Me6)RuCl} 2(µ-Cl)2] with the ligands (R)- and (S)-Ph2PCH2CHMeCH2 OH afford the neutral complexes [(h6-C6Me6)RuCl 2{h1-PPh2CH2 CHMeCH2OH-P}] [R-ligand (3), S-ligand (4)], which in turn react with AgBF4 to give the cationic compounds [(h6-C6Me6)RuCl{h 2-PPh2CH2CHMeCH2 OH-P,O}]BF4 [R-ligand (5), S-ligand (6)]. All complexes have been characterised by elemental analysis, IR and multinuclear NMR spectroscopies

Palavras-chave : Rhodium; ruthenium; chiral bidentate ligand; chiral phosphine; chiral-at-metal complexes.

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