Ruthenium compound

JOM(586)263, 99OM2370, 990M5375). Other imidazol-2-ylidene ruthenium compounds are also known (99TL2247, 99TL4787). 

Ruthenium-ozyd, n. (any) ruthenium oxide, esp. the sesquioxide, ruthenium(III) oxide, -oxydul, n. ruthenium monoxide, ruthenium-(II) oxide, -saure, /. ruthenic acid, -ver-bindung, /. ruthenium compound. 

The ruthenium compounds are entirely analogous to the iron compound. A profitable discussion of more of the numerous complexes containing NO can be given only after further experimental data, especially relative to magnetic moments, have been collected. 

Both types of experiment [fission + FeCp2 and RuCp2 (n,y)] seem to yield additional volatile ruthenium compounds. These compounds have not yet been identified. 

The method is not restricted to secondary aryl alcohols and very good results were also obtained for secondary diols [39], a- and S-hydroxyalkylphosphonates [40], 2-hydroxyalkyl sulfones [41], allylic alcohols [42], S-halo alcohols [43], aromatic chlorohydrins [44], functionalized y-hydroxy amides [45], 1,2-diarylethanols [46], and primary amines [47]. Recently, the synthetic potential of this method was expanded by application of an air-stable and recyclable racemization catalyst that is applicable to alcohol DKR at room temperature [48]. The catalyst type is not limited to organometallic ruthenium compounds. Recent report indicates that the in situ racemization of amines with thiyl radicals can also be combined with enzymatic acylation of amines [49]. It is clear that, in the future, other types of catalytic racemization processes will be used together with enzymatic processes. 

Kistner et al. [109] were the first to observe the Mossbauer effect in Ru. Kistner also reported the Mossbauer spectroscopy study of ruthenium compounds and alloys [110]. 

Fig. 7.30 Measured Ru isomer shifts in ruthenium compounds with different oxidation states of Ru (from [113] and complemented by values obtained at 4.2 K for Ru(V) oxides of the form Ba3Ru2M09 (M = Mg Ca, Sr Co, Ni, Zn and Cd) from [114])...

In another investigation of bond properties in ruthenium compounds, it was found [123] that the isomer shift increases in the series... 

Brabec, V. DNA Modifications by Antitumor Platinum and Ruthenium Compounds Their Recognition and Repair, Academic Press Amsterdam, 2002 Vol. 71 pp 2-45. 

Fig. 11. Molecular structures of (a) fac-[RuCl3(NH3)3], the first reported ruthenium complex with anticancer activity, and (b) NAMI-A and KP1019, two ruthenium compounds currently in clinical trials.

The ruthenium compounds described above show a distinctly lower metathetic activity than the molybdenum alkenylidene complex 24 developed by Schrock et al. (Fig. 4, see also the chapter by R.R. Schrock, this volume) [18], which is another standard catalyst for any type of olefin metathesis reaction. However, they... 

Catalytic oxidant.1 In combination with N-methylmorpholine N-oxide (7,244) as the stoichiometric oxidant, this ruthenium compound can be used as a catalytic oxidant for oxidation of alcohols to aldehydes or ketones in high yield in CH2C12 at 25°. Addition of 4A molecular sieves is generally beneficial. Racemization is not a problem in oxidation of alcohols with an adjacent chiral center. Tetrabutylammonium perruthenate can also be used as a catalytic oxidant, but the preparation is less convenient. 

Ruthenium compounds, 19 637-641 synthesis of, 19 640 uses for, 19 640—641 Ruthenium-copper clusters, 16 70 Ruthenium initiators, 26 934 Ruthenium plating, 9 823 Ruthenium-silica... 

DR. THOMAS MEYER (University of North Carolina) Wagner de Giovanni, in my lab, is studying the reaction between an oxo ruthenium compound and N0 ... 

Dr. Erickson For those interested in coordination chemistry, certain other transition metal atoms are suitable for Mossbauer spectroscopy. One in particular is ruthenium which is just below iron in the Periodic Table. It is a difficult isotope to work with since it requires helium temperatures almost exclusively. I don t know whether it is possible to work at nitrogen temperatures or not, but Kistner at Brookhaven has examined various ruthenium compounds from the 2-j- to the 8+ oxidation states with interesting results. These are not published yet, but at least his work offers the possibility of going down one element below the other in the Periodic Table to study chemical effects. Osmium, which is below ruthenium, can also be Mossbauered. Some sort of systematic study like this involving elements in the various transition series would be extremely interesting. 

---