78724-99-9Relevant academic research and scientific papers
Novel hydroxo- and hydrido-bridged trinuclear ruthenium-iron derivatives. X-ray structure of FeRu2(μ-OH)2(CO)8(PPh3) 2
Jones, Denis F.,Dixneuf, Pierre H.,Benoit, Alain,Le Marouille, Jean-Yves
, p. 29 - 33 (2008/10/08)
Reaction of the trinuclear complexes FeRu2(μ-Cl)2(CO)8L2 (1) [L = PPh3 (a), PMe3 (b), AsPh3 (c)] with aqueous sodium carbonate in acetone leads to the substitution of chloro bridges to afford the heteronuclear derivatives FeRu2(μ-OH)2nCO)8L2 (2) containing hydroxo bridging groups, whereas potassium iodide with 1a leads to the cleavage of the Fe-Ru bonds and formation of the binuclear compound Ru2I2(CO)4(PPh3)2 (4). A similar reaction of 1a with aqueous Na2CO3, but in 2-propanol, gives the bis(n-hydroxo) complex 2a and a mixed hydrido-hydroxo bridged complex: FeRu2(μ-H)(M-OH)(CO)8(PPh3)2 (3), for which the 1H NMR shows coupling of the μ-H proton (δ -10.55) with two equivalent phosphorus nuclei. The complex FeRu2(μ-OH)2(CO)8(PPh3) 2 (2a) crystallized in space group P21/n with cell dimensions a = 13.851 (8) A?, b = 17.852 (6) A?, c= 17.510 (9) A?, β = 95.21 (5)°, and Z = 4. Refinement based on 5678 independent reflections converged at Rw = 0.035. The trimetallic chain Ru-Fe-Ru shows equivalent Fe-Ru bonds at the position trans to each phosphorus-ruthenium bond [Fe-Ru(1) = 2.806 (1) A? and Fe-Ru(2) = 2.805 (1) A? with a Ru(1)-Fe-Ru(2) angle of 65.41 (1)°]. The hydroxo groups, which establish equivalent Ru-O bond lengths (average 2.12 A?), maintain the ruthenium atoms at a distance of 3.032 (1) A?, which is short for nonbonding ruthenium atoms.
