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Ruthenium(II)-dimethyl sulfoxide complexes with nitrogen ligands: synthesis, characterization and solution chemistry. The crystal structures of cis,fac-RuCl2(DMSO)3(NH3) and trans,cis,cis-RuCl2(DMSO)2(NH3)2·H2O

1991; Elsevier BV; Volume: 187; Issue: 1 Linguagem: Inglês

10.1016/s0020-1693(00)82975-8

1873-3255

M. Henn, Enzo Alessio, G. Mestroni, M. Calligaris, Wahib M. Attia,

Lanthanide and Transition Metal Complexes

In this paper we report the synthesis and characterization of some new derivatives of the isomers cis- (1) and trans-RuCl2(DMSO)4 (6) (DMSO=dimethyl sulfoxide) with monodentate nitrogen donor ligands (L) such as NH3, imidazole (Im) and benzimidazole (BzIm): cis,fac,-RuCl2(DMSO)3(L) (L=NH3 (2) Im (3)); cis,cis,cis-RuCl2(DMSO)2(Im)2 (4); fac-[Ru(Im)3Cl(DMSO)2]PF6 (5); trans,cis,cis-RuCl2(DMSO)2(L)2 (L=NH3 (7), Im (8), BzIm (9)); trans,-RuCl2(DMSO)3(Im) (10). All complexes have exclusively S-bonded DMSOs. Their chemical behavior in aqueous solution is also described. The crystal structures of cis,fac-RuCl2(DMSO)3(NH3) (2) and trans,cis,cis-RuCl2(DMSO)2(NH3)2·H2O (7) were determined by three dimensional X-ray analyses. Crystal data: 2, a=9.103(2), b=12.568(2), c=13.375(6) Å, β=96.52(2)°, monoclinic, space group P21/n, Z=4; 7, a=8.507(4), b=11.331(4), c=14.071(4) Å, β=90.99(1)°, monoclinic, space group P21c, Z=4. Least-squares refinement based on 4045 (2) and 3682 (7) reflections converged to R=0.026 and 0.030 for 2 and 7, respectively. In 2, the three DMSOs have RuS bond distances of 2.2774(6) and 2.2458(5) Å (trans to Cl), and 2.2877(5) Å (trans to N). The RuCl bond distances are 2.4178(6) and 2.4411(6) Å (trans to S), while the RuN (trans to S) bond length is 2.151(2) Å. In 7, the trans RuCl bond distances are 2.4030(7) and 2.4125(7) Å, while the RuS (trans to N) bond distances are 2.2350(6) and 2.2469(6) Å, and the RuN (trans to S) 2.142(2) and 2.156(2) Å.