Ru-X bonds

Recent study of the [Ru(NO)X5]2 species (X = halogen, CN) shows that in general the Ru—X bond trans to nitrosyl is slightly longer than the cis-Ru-X bond (Table 1.10) [121]. [Pg.44]

The inertness of these white-yellow complexes was ascribed to strengthening of the Ru—X bond due to reduced n-acceptor power of L compared with the cyclopentadienyl group. ... [Pg.363]

An interesting class of reactions of (r)5-C5H5)(PR3)2RuX involves the insertion of certain electrophiles (E) into the Ru—X bond [Eq. (55)]. [Pg.27]

The reactions of an analogous A-frame type complex [Ru2(C0)4(/u.-dppm)2(/x-02CMe)]+ (59) have been studied extensively and are outlined in Scheme 14. When (59) is treated with [Et3 O] [BF4 ] in MeCN, the dication (60) is formed, which readily converts to (61). Reaction of (61) with excess of an anion yields coordinatively unsaturated complexes instead of the expected substitution products [Ru2(/u.-CO)2(/r-dppm)2X4]. The bond between the ruthenium centers is single, while the Ru-X bonds are multiple, probably double, as indicated by bond distances and angles in the crystal structure. An interesting rearrangement occurs when (59) is... [Pg.4151]

The preparalion of cyclic or acyclic (diene)RuCp X complexes 125 (Cp = C5H5 or CsMes) via direct complexation has been reported (Scheme 26) . This may be accomplished using either (l,5-cod)RuCpX (126) or the tetrameric species [Cp Ru(//3 — X)]4 (127). Complexes 125 exhibit the s-c zj -diene coordination mode as evidenced by X-ray diffraction analysis. The ligands are oriented such that the open end of the diene is eclipsed with the Ru—X bond. Treatment of complexes 125 with AgOSO2CF3 or AgO2CCF3 effects replacement of the halide ligand X with either a triflate or trifluoroacetate ligand. Oxidation of diene complexes 125 (R = Me), which lack alkyl substituents... [Pg.926]

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