Perchloric acid, dithiocarbamate complexes

Standard official methods have been described for the determination of nitric-perchloric acid-soluble nickel [174] and acetic acid-extractable nickel [175] in soil. To determine nitric acid-perchloric acid-soluble nickel [174], the acid digest is dissolved in hydrochloric acid and the nickel is determined by atomic absorption spectrometry. To determine extractable nickel, the nickel is first extracted from the soil with 0.5 M acetic acid and the nickel is then converted to the ammonium pyrrolidine dithiocarbamate complex. Extraction of the complex with chloroform provides an extract for the determination of nickel by atomic absorption spectrometry. 

With the exception of perchloric acid media, in which ttis(dithiocarbama-te)tellmiiun(lV) perchlorate species are formed (319), Te02 reacts with dithio-carbamate salts under acidic conditions to give the intensely colored homoleptic tetrakis(dithiocarbamate)teUurium(lV) complexes, [Te(S2CNR2)4]. The intense coloration results form Ugand-to-metal charge transfer (LMCT) bands in the visible region (293). 

Thienothiophens, Thienoselenophens, and Related Systems.—The thiophen derivative (738) cyclises to the thieno[2,3- >]tiiiophen (739)/ Electrochemical reduction of carbon disulphide in acetonitrile gives the di-anion (740), which forms the dithiolodithiole (741) on treatment with thiophosgene. The di(acylimino)tetrathiapentalenes (742) are obtained by the action of acid chlorides RCOCl on the complex of sodium cyanodithioformate with Perchloric acid transforms the bis-dithiocarbamate (743 R2N = piperidine) into the salt (744) the tetraselenium analogue has been prepared similarly/ ... 

Gallium(III) complexes, 129 amines, 129 amino acids, 141 arsenates, 135 borates, 134 borohydrides, 141 bromates, 135 carbonates, 134 caiboxylates, 135 chlorates, 135 citrates, 136 cyanides, 129 dithiocarbamates, 138 ethers, 136 fluorides, 138 germanates, 134 hydrides, 140 iodates, 135 p-ketoenolates, 134 lactates, 136 mixed halides, 139 molybdates, 135 nitrates, 135 peptides, 141 perchlorates, 135... 

---