T. Borchert et al., ELECTROPHILIC REACTIVITY OF ARENE LIGANDS COORDINATED TO RUTHENIUM CARBIDO CLUSTER COMPLEXES, Inorganica Chimica Acta, 274(2), 1998, pp. 201-209
Addition of RLi (R = Ph, Me) to [Ru6C(CO)(14)(eta(6)-C6H6)] (1) or [Ru
6C(CO)(12)(eta(6)-C6H6) (mu(2)-eta(2):eta(2)-C6H8)] (2), followed by r
eaction with [AuPPh3Cl]/TlPF6, leads to the formation of the mixed rut
henium-gold cluster complexes [Ru6C(CO)(14)(eta(4)-C6H6R2) (AuPPh3)(2)
] (5a, b) and 6C(CO)(12)(eta(6)-C6H5R)(mu(2)-eta(2):eta(2)-C6H8) (AuPP
h3)] (6a, b), respectively. Treatment of the likely intermediate produ
cts, the cluster salts (PPN)(2)[Ru6C(CO)(14)(eta(4)-C6H6R2)] (3a, b) a
nd (PPN)(2)[Ru6C(CO)(12)(eta(5)-C6H6R) (mu(2)-eta(2):eta(2)-C6H8)] (4a
, b) (PPN = [N(PPh3)(2)](+)) with [CPh3][BF4] affords hydride abstract
ion and gives the substituted arene cluster complexes [Ru6C(CO)(14)(et
a(6)-C6H4R2)] (7a, b) and [Ru6C(CO)(12)(eta(6)-C6H5R) (mu(2)-eta(2):et
a(2)-C6H8)] (8a, b), respectively. The crystal and molecular structure
s of [Ru6C(CO)(14)(eta(6)-C6H4Ph2)] (7a) and of two polymorphs of [Ru6
C(CO)(14)(eta(6)-C6H4Me2)] (7b) are established by X-ray crystallograp
hy. The molecules have a p-terphenyl (7a) and a p-xylene (7b) ligand e
ta(6)-coordinated to a vertex of a Ru-6 octahedron. (C) 1998 Elsevier
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