Di thiocarbamates

The chemical complexing-solvent extraction technique employed in this work involved the formation of a neutral complex in the aqueous phase between trialkyl lead chloride and a dithiocarbamate reagent such as sodium diethyl di-thiocarbamate. The complex was subsequently removed either as a precipitate or by extraction into an organic solvent. The extent of lead removal was traced by analysis of the aqueous phase for residual trialkyl lead using a Pye-Unicam 8000 spectrophotometer. 

Substituted thiazolidin-4-ones (449) are easily prepared by the reaction between chloracetic acid, or its derivatives (447), and a thiourea, a thiosemicarbazide, or a mono-or di-thiocarbamate (448 Scheme 255). The same a-chloro acid derivatives react with metallic thiocyanates yielding an intermediate (450), the cyclization of which gives a 2-iminothiazolidin-4-one (451). In these reactions a -chloracetic acid may be replaced by... 

The complex, tetrakis[thiourea]tellurium dichloride, reacted with bis[2-hydroxyethyl]di-thiocarbamic acid in aqueous methanol to precipitate tellurium bis[his(2-hydroxyethyl)di-thiocarbamate] as an orange solid11. 

Tellurium tetrakis[bis(2-hydroxyethyl)dithiocarbamate] was treated with an aqueous solution of potassium iodide. Black crystals of tellurium bis[bis(2-hydroxyethyl)di-thiocarbamate diiodide were obtained4. 

A simple, rapid, and reliable viscometric technique for evaluating the protective capacity of commercially available materials as inhibitors of ozone-induced polymer chain scission has been described (1). This work included the results of an evaluation of several chemicals such as A,A -di-sec-butyl-p-phenylenediamine, nickel dibutyl di-thiocarbamate, l-(m-aminophenyl)-2,5-dimethylpyrrole, and 2,6-di-tert-butyl-4-methyl-phenol as antiozonants A,A -di-sec-butyl-p-phenylenediamine exhibited superior inhibiting characteristics. However, because of the potential toxic effects and relatively high vapor pressure of this chemical, its use is considered impractical. 

Carbamate compounds are usually subdivided into at least three main groups with respect to their structure and general use (see Figure 1) insecticides, herbicides, and thio- or dithiocarbamates. A variety of R groups may be substituted in the molecule producing, as is the case for insecticides, a variety of alkyl or aryl esters of carbamic acid. Although technically characterized as carbamate pesticides, thio- and di-thiocarbamate fungicides are not included in this... 

The low resolution of a protein structure determination implies limited accuracy. Therefore any discussion of bond-length variations should be complemented with data from small molecule crystal structures. Tris-di(thiocarbamate)lron(III) complexes show a high-spin/low-spin equilibrium in the solid state [141, 142]. This process involves a systematic change in Fe-S bond length and affects the atomic displacement parameters [141]. In the low-spin configuration there are no an-... 

Arazate . [Uniroyal] Zinc dibenzyl di-thiocarbamate accelerata for NR, SBR, latexes, cements, foam. 

Butazate . [Unitoyal] 2Linc dibutyl di-thiocarbamate acederatw for ETOM ... 

Setsit . [R.T. Vanderbilt] Activated di-thiocarbamate accelerator for rubber latexes. 

Several cyanodithiofomiatcs are mentioned in ref. 1. The coordination chemistry of monothio-carboxylates deals almost exclusively with thioacetates and thiobenzoates. Structures of several monothiobenzoates are based on IR data. Those, however, of the copper(I) and silver(I) complexes are doubtful. They are probably polymeric and of the same structural class as the mono- and di-thiocarbamates ... 

Accelerator DY 062. SeeN-Benzyldimethylamine Accelerator DY 064. See 2,4,6-Tris (dimethylaminomethyl) phenol Accelerator P. SeePiperidinium pentamethylene di thiocarbamate Accelerator SB. See Sodium di-n-butyl dithiocarbamate... 

Vanin A, Huisman A, and van Faassen E (2002) Iron di-thiocarbamate as spin trap for nitric oxide Pitfalls and successes. Methods in Enzymology 359 27—42. 

Synthesis.— The condensation of a-halogenoaldehydes or ketones with monothio- or dithio-carbamates normally yields fully substituted 4-thiazolines (248 X = O or S). Metzger et a/. have briefly reported an anomalous cyclization to (249) when t-butyl (di)thiocarbamate is employed, and have proposed a mechanism to account for this observation. 

Bond and Wallace [10] described a microprocessor-based chromatographic system which they used for the simultaneous and automated determination of Pb(II), Cd(II), Hg(II), Co(II), Ni(II), and Cu(II). Reverse-phase was used to separate in situ formed di-thiocarbamate complexes, and the system could operate continuously and unattended for periods of several days using spectrophotometric detection, and slightly less time using electrochemical detection with background suppression because this mode required frequent suppressor regeneration. 

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