Osmium dithiocarbamate complexes

Most of the reports of osmium complexes containing 1,1-dithio ligands are concerned in the use of dithiocarbamate complexes for the analytical determination of the metal (296) a violet color forms when OSO4 and NaR2dtc are mixed in aqueous solution (84). 

Osmium tris(dithiocarbamate) complexes [Os(S2CNR2)3] were only authentically detailed in the early 1980s (295,296). They can be prepared upon addition... 

Figure 161. Ruthenium and osmium(II) dithiocarbamate complexes bearing chelating LX-type ligands.

Phenylarsine bis (diethyl dithiocarbamate), secondary bonding by, 15 30-31 Phenylazidosilanes, properties, 9 141 (Phenylazo)acetaldoxime complexes, osmium, 37 270... 

A number of osmium(III) dithiocarbamates are known. The diethyl complex Os(S2CNEt2)3 is made by reaction of (NH4)2[OsCl5] and Na(S2CNEt2). The molecule contains diastereotopic methylene protons and, from a study of the HNMR spectra over a temperature range, rate constants were calculated from the metal-centred optical inversion of the complex. The magnetic moment is 1.61 BM at 25 °C. The dimeric species Os2(S2CNMe2)sCl is made from (NH4)2[OsCl ] and Na(S2CNMe2). ... 

Facile sulfur-carbon cleavage of a dithiocarbamate at ruthenium(II) and osmium(ll) centers is also implicated in the synthesis of thiophenylazopyridine complexes (526) from the analogous 2-chlorophenylazopyridine complexes (525) upon addition of NaS2CNEt2 in DMF (Eq. 191) (2055). An analogous transformation also occurs at the cobalt(lll) center. 

---