Selenocyanates sulfates

Thousands of compounds of the actinide elements have been prepared, and the properties of some of the important binary compounds are summarized in Table 8 (13,17,18,22). The binary compounds with carbon, boron, nitrogen, siUcon, and sulfur are not included these are of interest, however, because of their stabiUty at high temperatures. A large number of ternary compounds, including numerous oxyhaUdes, and more compHcated compounds have been synthesized and characterized. These include many intermediate (nonstoichiometric) oxides, and besides the nitrates, sulfates, peroxides, and carbonates, compounds such as phosphates, arsenates, cyanides, cyanates, thiocyanates, selenocyanates, sulfites, selenates, selenites, teUurates, tellurites, selenides, and teUurides. 

Diazotization of 3-amino-2-acetylselenophene (105) and reaction with potassium selenocyanide yields the selenocyanate (106) ring closure with ammonia gives the fused system 107 which was O-methylated with dimethyl-sulfate.135... 

Phenyl N-phenylphosphoramidochloridatc, 416 Phenylselenenylation, 219 Phenyl selenocyanate, 33, 416-417 (3-Phcnylselcnoindole, 37, 38 N-Phenylselenophthalimide, 417-418 3-Phenylseleno sulfones, 407, 408 (3-(Phenylseleno)vinyl sulfones, 408 Phenyl sulfates, 410 Phenylsulfinylacetonitrile, 418-419 4-(Phenylsulfmyl)butyric acids, 1... 

The regiospecific reaction of the cyclic sulfate 47 with AcSK or KSCN gives acetylthio or thiocyano sulfates, which have been converted to the episulfide 48 by treatment with NaOMe (Scheme 11) <1995CC461, 1997JOC3944>. Similar double displacement with KSeCN affords the selenocyanate, which has been reduced to the corresponding alkene 49 by sodium borohydride in methanol (Scheme 11) <1995CC461, 1997JOC3944>. 

Potassium pentachloronitrido-osmate(VI), 6 206 Potassium permanganate, solution of, standardization of, for determination of average atomic weight of rare earth elements in oxalates, 2 60, 61 Potassium pyrosulfite, 2 166 and its f-hydrate, 2 165, 167 Potassium rare earth sulfates, 2 47 Potassium selenocyanate, 2 186 Potassium sulfites, KHSO , in solution, 2 167... 

Sodium selenocyanate, 2 186, 187 Sodium selenopentathionate 3-hydrate, 4 88, 89 Sodium sulfate, removal of, in... 

Lanthanide complexes of 1,10-phenanthroline (phen) have been obtained as chlorides, nitrates, sulfates, perchlorates acetates, thiocyanates and selenocyanates from various solvents. 

Two representative examples of this behavior are reflected in two distinct different chemical systems, namely (a) copper deposition from an acid sulfate electrolyte containing the co-inhibitors PEG-C1 and a bi-functional catalytic species SPS-C1 [12, 136, 243, 264] and (b) silver deposition from a cyanide electrolyte where inhibition is provided by adsorption of silver cyanide species and catalysis is achieved through adsorption of selenocyanate, SeCN [72-75]. Similar behavior is evident in some electrolytes used for the deposition of bright soft gold films [121, 180, 255-261, 267]. 

A cyclic sulfate 278 treated with potassium selenocyanate gave the expected selenirane 282, which underwent the elimination of a selenium atom, giving rise to alkene 283 [95JCS(CC)461] (Scheme 71). Interestingly, the reaction of di-O-isopropylidine cyclic sulfate 284 with sodium thioacetate did not yield the corresponding episulfide 285. However, when sodium sulfide was used as a nucleophile in boiling methanol, a 42% yield of episulfide 285 was obtained [Eq. (48)] [94JCS(CC)461]. 

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