Reaction of CH2(Ph2PSe)2 (dppmSe2) with [Ru3(CO)12]. Fluxional behaviour of [Ru3(μ3-Se)2(CO)7(μ-dppm)] and crystal structures of [Ru4(μ4-Se)2(μ-CO)(CO)8(μ-dppm)]·MeOH and [Ru6(μ3-Se)4(CO)12(μ-dppm)2]·CH2Cl2

16 The noble metals

“…56 Despite their involvement as effective catalysts in the water gas shift reaction, the chemistry of these mono(2,2 H -bipy) complexes has been neglected. However, this has been recti¢ed by ¢nding that the reaction of 2,2 H -bipy with [RuCl(CO) 3 ] 2 in ethylene glycol gave 57a An extensive survey of 99 Ru NMR spectra ¢nds a correlation of chemical shift with absorption energy in various diimine (L) complexes [RuXY(CO) 2 L] (X,Y monodentate anions), con¢rming the assignment of electronic transitions and allowing the detection of isomers in complexes of mixed 2,2 H -bipy derivatives. 57b There has also been a great deal of activity concerning ruthenium complexes of terpy and its derivatives.…”

“…98 Earlier work on the reactions of metal carbonyls with dppmSe 2 to prepare clusters containing Se and dppm has been developed by the synthesis of such new compounds as the cubane [Ru 4 Se 4 (CO) 10 (dppm)]. 99 100 [Ru(CO) 5 ] reacts with the hexatriyne C 2 (CCSiMe 3 ) 2 (L) to give [Ru 3 L(CO) 10 ] and [Ru 4 L(CO) 10 ] with m 3 and m 4 bridging central alkynes respectively. 101 Os 3 and Os 3 Ru analogues were also made.…”