Antimony , dithiocarbamates

Antimony-121 Mossbauer Spectroscopy Sb Mossbauer spectra of a number of antimony dithiocarbamate... 

Antimony-121 Mossbauer Data for Antimony Dithiocarbamate Complexes... 

A number of compounds of the types RSbY2 and R2SbY, where Y is an anionic group other than halogen, have been prepared by the reaction of dihalo- or halostibines with lithium, sodium, or ammonium alkoxides (118,119), amides (120), azides (121), carboxylates (122), dithiocarbamates (123), mercaptides (124,125), or phenoxides (118). Dihalo- and halostibines can also be converted to compounds in which an antimony is linked to a main group (126) or transition metal (127). 

The structural chemistry of some metal dithiocarbamates, i.e. systematics, coordination modes, crystal packing, and supramolecular self-assembly patterns of nickel, zinc, cadmium, mercury,363 organotin,364 and tellurium,365 366 complexes has been thoroughly analyzed and discussed in detail. Supramolecular self-assembly frequently occurs in non-transition heavier soft metal dithiocarbamates. Thus, lead(II),367 bismuth(III)368 zinc,369 cadmium,370 and (organo)mercury371 dithiocarbamates are associated through M- S secondary bonds, to form either dimeric supermolecules or chain-like supramolecular arrays. The arsenic(III)372 and antimony(III)373 dithiocarbamates are... 

Antimony Sb(III) and Sb(VI) adsorbed as ammonium pyrrolidine dithiocarbamate complexes onto Cis bonded silica Graphite furnace AAS 0.05 [xg/1 [860]... 

Phosphorus is present in zinc dialkyldithiophosphate and deactivate platinum catalysts in engine exhaust systems. Using zinc, antimony and oxothiomolybdate dialkyl-dithiocarbamate (MoDTC) complexes alone or in combination with other lubricating oil additives appears to solve this problem. Antimony complexes are used also as extreme pressure agents while molybdenum ones as friction modifier additives (Hill et al., 1994). Analyses of Zn(dtc)2 decomposition using the thermogravimetric method, flash vacuum pyrolysis, and four-ball machine... 

Antimony has a great affinity for charged sulfur ligands which include thiolates, xanthates (R0CS2 ), dithiocarbamates (R2NCS2 ), and dithiophosphates ((RO)2PS2 ). In contrast to arsenic, where this chemistry is limited to oxidation state III, antimony forms compounds in oxidation states III and V. The xanthate, dithiocarbamate, and dithiophosphate complexes are mostly made by reaction of antimony(III) halides or organohalides with Na, NH4, or Ag salts of the acids. Complexes... 

The separation of organomercury was conducted by using a SB-methyl-100 capillary column and pure CO2 as the mobile phase. FID and atomic fluorescence were used for detection. The same column was also used for separation of mercury, arsenic, and antimony species using carbon dioxide as the mobile phase. A chelating reagent, bis(trifluoroethyl)dithiocarbamate, was used in this case to convert the metal ions to organometallic compounds before the separation. The detection limit of FID was 7 and 11 pg for arsenic and antimony, respectively. 

Extraction of the Sb(III) dithiocarbamate complexes from acid media allows antimony to be separated from many metals [9-11]. A preliminary extraction of Bi and Cu dithiocarbamates can be carried out after oxidation of Sb(III) to Sb(V). 

Arsenic(iii) tris(dithiocarbamates) As[SC(S)NR2l3 result when arsenic trichloride reacts with amines and carbon disulphide, and analogous antimony compounds can also be obtained. The reaction is considered to proceed by CS2 insertion into the As—bonds of the trisamino-derivatives and the products are considered to have an octahedral arrangement around arsenic which is distorted owing to the effect of the lone pair. The compounds... 

Bonds to Sulphur.—The antimony atom in the dithioester (103) is in pseudo-trigonal-bipyramidal co-ordination as a result of the 1,5-interaction often observed in similar systems. In the dithiocarbamates M(S2CNEt2)3, where M = Sb or Bi, the ligands are asymmetrically co-ordinated, as found for the arsenic compound, but here there is increasing intermolecular attraction, so that with bismuth an apparent dimer is formed. ... 

Laintz, K.E. Shieh, G.M. Wai, C.M. Simultaneous determination of arsenic and antimony species in environmental samples using bis(trifluoroethyl)dithiocarbamate chelation and supercritical fluid chromatography. J. Chromatogr. Sci. 

Thus the results from the studies of copper bis-dithiocarbamate complex reactions with tin(22) antimony(22) and copper(23) halides show formation of copper(II) mixed-ligand complexes. 

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