Abstract
The dinuclear arene ruthenium complexes [RuCl 2{C 6H 5(CH 2) 3OCO- p-C 6H 4-OC 8H 17}] 2 ( 1) and [RuCl 2{ p-C 6H 4(CH 2COOCH 2CH 3) 2}] 2 ( 2) have been obtained by dehydrogenation of the corresponding cyclohexadiene derivative with ruthenium chloride hydrate. The single-crystal X-ray structure analysis of 2 shows the arene ligands to be involved in slipped-parallel π–π stacking interactions with neighbouring molecules, thus forming infinite chains along the b-axis. The dinuclear complexes 1 and 2 react with two equivalents of triphenylphosphine (PPh 3) to give in excellent yield the corresponding mononuclear phosphine complexes [RuCl 2{C 6H 5(CH 2) 3OCO- p-C 6H 4-OC 8H 17}(PPh 3)] ( 3) and [RuCl 2{ p-C 6H 4(CH 2COOCH 2CH 3) 2}(PPh 3)] ( 4), respectively. The single-crystal X-ray structure analysis of 4 reveals the formation of a dimer through two C–H⋯Cl interactions in the solid state.
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