Phenyl complex with thiourea

Phenyl, 4-methoxyphenyl, and 4-ethoxyphenyl tellurium thiocyanates are known only in the form of their complexes with thiourea ethylenethiourea, triphenylarsine oxide, 3-methylpyridine, 3-methylpyridine A -oxide, or 4-methylpyridine A -oxide. These compounds were prepared from the diaryl ditellurium compounds, thiocyanogen, and the ligands. ... 

Most of the complexes have well defined melting points. They appear to be monomeric in solution . An interesting method for the preparation of thiazolidine-2-thione complexes of aryl tellurium trichlorides is the addition of the tellurium compound to a melt of the ligand kept at 110°. Complexes with 1 1, 1 2, and 1 4 stoichiometries (Te-compound ligand) were obtained after recrystallization from dry methanol. Phenyl tellurium trichloride complexes with thiourea appear to form only when an organic solvent is used as the reaction medium in aqueous media the trichloride is reduced to the monochloride that is isolated as the thiourea adduct . 

Chiral thioureas have been synthesized and used as ligands for the asymmetric hydroformylation of styrene catalyzed by rhodium(I) complexes. The best results were obtained with /V-phenyl-TV -OS )-(l-phenylethyl)thiourea associated with a cationic rhodium(I) precursor, and asymmetric induction of 40% was then achieved.387,388 Chiral polyether-phosphite ligands derived from (5)-binaphthol were prepared and combined with [Rh(cod)2]BF4. These systems showed high activity, chemo- and regio-selectivity for the catalytic enantioselective hydroformylation of styrene in thermoregulated phase-transfer conditions. Ee values of up to 25% were obtained and recycling was possible without loss of enantioselectivity.389... 

A wide-ranging study of several cyclometallated analogs of platinum(ii) terpyridine/chloro complexes has been undertaken.Crystal structures were determined, and substitution kinetics experiments in methanol were conducted. The nucleophiles Br and Gl were employed, and in two cases, [Pt(N-N-C)Cl] and [Pt(N-G-N)Gl], substitution kinetics with TU, DMTU, and TMTU were measured. N-N-CH is 6-phenyl-2,2 -bipyridine, N-CH-N is l,3-di(2-pyridyl)benzene, TU is thiourea, and DMTU and TMTU are the dimethyl and tetramethyl analogs of TU. The complexes are schematically represented below 5. 

Related reactions of thiolate anions with ort/zo-chloromethyl-phenyl(diphenyl)phosphine have provided a range of ort/ o-alkyl and aryl-thiomethylphenyl(diphenyl)phosphines. " The reactions of 2-amino-alkylphosphines with isocyanates and isothiocyanates have provided routes to new chiral phosphinoalkyl-urea and -thiourea ligands. Similarly, treatment of hydroxy- or amino-functional arylphosphines with isocyanides in the presence of a cyclooctadienepalladium(II) complex results in the formation of bidentate arylphosphino-carbene palladium complexes. New chiral phosphinoarylphosphoramidite ligands, e.g.,... 

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