Crystal and molecular structure of a colored intermediate from the reaction of tetramethylthiourea and copper(2+) (dichlorobis(tetramethylthiourea)copper(II))

The oxidation of dimethyl sulphide, trimethylamine, and trimethylphosphine by solvated copper(II) or thallium(III) hexafluorometallates in acetonitrile

“…The thallium(II1) cation appears to be more effectively solvated by MeCN than is the thallium(1) cation ( 3 , nevertheless electrochemical measurements indicate that solvated ~1 " ' is a stronger oxidizing agent than CU" in MeCN (4). Redox reactions between CU" and thiourea derivatives (6,7) or tertiary phosphines (8) in several solvents are well documented and similar behaviour was expected for reactions involving SMe2 and PMe3. A redox reaction between anhydrous CuC12 and NMe3 at 348 K has been reported (9) as has the spontaneous reduction of Cu" to Cul in the presence of 3,6-bis(2-pyridy1thio)pyridazine (1 0).…”

“…This is not unreasonable, since the concentration of free ligand in solution would be expected to be smaller than is the case for the weaker ligands SMe2 and NMe3. The available evidence indicates that the behaviour of PMe3 towards CU" is very like that of tmtu (6).…”

Crystal and molecular structure of bis(4-bromo-N-(diethylcarbamothioyl)benzamido)nickel(II) complex

“…1,3-Dialkyl or diaryl thioureas exhibit significant antifungal activity against plant pathogens Pyricularia oryzae and Drechslera oryzae [8]. Furthermore, thiourea and its derivatives are a well-known class of excellent ligands for transition metals, which also exhibit redox activity with reducible metal ions to make the reaction systems complicated [9][10][11]. Moreover, ion selective electrodes for Pb(II) based on benzoylthioureido derivatives as ionophores have been formulated [12].…”

X-ray diffraction study of copper(I) thiourea complexes formed in sulfate-containing acid solutions

“…The chemistry of thiourea in copper-ion-containing solutions is rather complex due to the formation of a number of Cu I complex species with different molecular structures (Vranka & Amma, 1966;Hanic & Durcanska  , 1969;Spofford & Amma, 1970;Weininger et al, 1972;Gash et al, 1973;Taylor et al, 1974;Grif®th et al, 1976;Ferrari & Gasparri, 1976;Grif®th et al, 1978). In acid solution complex species are positively charged and the molecular structure of crystallized complex salts depends on the nature of the counter ions.…”