The structures of binuclear ruthenium complexes. Part II. The crystal and molecular structure of [Ru2Cl3(Et2PhP)6]+[RuCl3(Et2PhP)3]–, tri-µ-chloro-hexakis(diethylphenylphosphine)diruthenium(II) trichlorotris(diethylphenylphosphine)ruthenate(II)

Abstract

The structure of [Ru₂Cl₃(Et₂PhP)₆]⁺[RuCl₃(Et₂PhP)₃]^– was determined by X-ray diffraction. The crystals are triclinic, space group P, with a= 21·054, b= 20·518, c= 12·279 Å, α= 86·98°, β= 86·02°, and γ= 113·02°. The cation contains two approximately octahedrally co-ordinated ruthenium atoms joined by three bridging chlorine atoms. The Ru ⋯ Ru separation is 3·443 Å. The Ru–bridging-Cl bond-lengths range from 2·499–2·458 Å(mean 2·481 Å). The Ru–P bond lengths in the cation range from 2·313–2·323 Å(mean 2·318 Å). The anion is in the mer-form which contains two mutually trans chlorine ligands Cl(4) and Cl(5), two mutually trans phosphorus atoms P(7) and P(9), and a phosphorus atom P(8)trans to a chlorine atom Cl(6). The high trans effect of the phosphine ligands is illustrated by the long Ru–Cl(6) bond-length of 2·513 Å compared with the Ru–Cl(4) and Ru–Cl(5) distances of 2·446 and 2·442 Å respectively. The Ru–P(7) and Ru–P(9) bond-lengths of 2·389 and 2·364 Å may also be compared with the Ru–P(8) bond-length of 2·259 Å.