ChemInform Abstract: A New and General Method for the Preparation of Novel π‐Heterocyclic Derivatives of Ruthenium (C5Me5Ru(η6‐Arene))X (Arene = Benzene, Thiophene, 3‐Methylthiophene, Benzothiophene, Pyridine, 2,6‐ and 3,5‐Lutidine, Quinoline, Acridine). X‐Ray Crystal Structure of ((C5Me5)2Ru2Cl2(pyridine)2)PF6.

Abstract

241ChemInform Abstract The polymeric ruthenium complex (I) is reduced with zinc in THF or acetone and subsequently treated with arenes such as (II) and potassium hexafluorophosphate (III) to produce the corresponding η5-or η6-arene complexes (IV).

Synthesis, Structure and Reactivity of Homo‐ and Heterobimetallic Complexes of the General Formula [Cp*Ru(μ‐Cl)3ML] [LM = (arene)Ru, Cp*Rh, Cp*Ir]

“…Aromatic solvents, on the other hand, are not suited because of the very high tendency of the Cp*Ru + fragment to form sandwich complexes of the general formula [Cp*Ru(arene)]-X. [14][15][16]22] When complex 8 was dissolved in benzene, crystals of the ionic complex [Cp*Ru(C 6 H 6 )][Cp*RhCl 3 ] (12) formed after a few hours (Scheme 3). Larger amounts of 12 could be obtained by slow diffusion of hexane into a solution of 8 in benzene.…”

“…Complex 4 can be obtained by reduction of [Cp*RuCl 2 ] 2 with LiHBEt 3 [14] or with Zn. [15] Alternatively, it can be obtained by reaction of the methoxy-bridged complex [Cp*Ru(µ-OMe)] 2 (5) with Me 3 SiCl. [16] We chose the latter method for our reactions.…”

Modelling the Hydrodenitrogenation of Aromatic N-Heterocycles in the Homogeneous Phase

“…[40,41] Unlike thiophene, [3Ϫ6] the nitrogen atom in η 1 (N)-PY complexes is retained in the ring plane. [42] Formally, monohapto-PY complexes are also the η 1 (C) ones obtained from CϪH bond activation by electron-rich metal fragments. [43] Another quite common coordination mode of PY is the η 6 mode, whose formation does not necessarily require the presence of alkyl substituents in the 2,6 positions of the ring to hinder the η 1 (N) mode.…”

Decarboxylative Allylation of Ketone Enolates with Rh, Ir, and Mo

“…The addition of two equivalents of pyridine failed to generate a catalyst that was comparable to the combination of [Cp*RuCl] 4 and bipyridine. This is most likely due to the reported formation of Ru dimer, rather than the desired monomer, upon the addition of pyridine to [Cp*RuCl] 4 [32]. This complex produced the branched product in 2.5:1 ratio along with the linear product.…”