Copper II thiocyanate

Arsonium salts have found considerable use in analytical chemistry. One such use involves the extraction of a metal complex in aqueous solution with tetraphenyiarsonium chloride in an organic solvent. Titanium(IV) thiocyanate [35787-79-2] (157) and copper(II) thiocyanate [15192-76-4] (158) in hydrochloric acid solution have been extracted using tetraphenyiarsonium chloride in chloroform solution in this manner, and the Ti(IV) and Cu(II) thiocyanates deterrnined spectrophotometricaHy. Cobalt, palladium, tungsten, niobium, and molybdenum have been deterrnined in a similar manner. In addition to their use for the deterrnination of metals, anions such as perchlorate and perrhenate have been deterrnined as arsonium salts. Tetraphenyiarsonium permanganate is the only known insoluble salt of this anion. 

Rhodan-ion, n. thiocyanogen ion, CNS -kali, -kalium, n, potassium thiocyanate, -kalzium, n. calcium thiocyanate, -kupfer, n. cupric thiocyanate, copper(II) thiocyanate. -iSsung, /. thiocyanate solution, -metall, n. (metallic) thiocyanate, -methyl, n. methyl thiocyanate, -natrium, n, sodium thiocyanate, -nickel, m. nickel thiocyanate, -quecksilber, n. mercury thiocyanate, -salz, n. thiocyanate, -sdure, /. (Org. Chem.) thiocyan(at)o acid, -tonerde, /. aluminum thiocyanate. 

The action of copper(II) thiocyanate on the bis(acetoxymercurio) derivative 12 results in the formation of a mixture of 6-thiocyanatotrithiadiazcpinc 14 and 6,7-dithiocyanatotrithiadiazep-... 

Chromyl isothiocyanate, 0612 Copper(I) cyanide, 0620 Copper(II) cyanide, 0616 Copper(II) thiocyanate, 0618... 

Synthesis of copper and zinc complexes of 5,7-dimethyl-l,2,4-triazolo [l,5-a]pyrimidine has been reported [93AX(C)1902 94AX(C)510], Reaction of copper(II) thiocyanate with 5,7-dimethyl-l,2,4-triazolo[l,5-a]-pyrimidine (l) gave three different complexes two isomers of [Cu(NCS)2L2]2 and Cu(NCS)2L2 H20 (84IC2803). The mononuclear complexes, bis(thiocyanato-N)bis(6-methyl-l,2,4-triazolo[l,5-a]pyrimidine-jV-3)copper(II) and the polynuclear pseudo-layered complexes, bis(thio-cyanato-A0bis(5-methyl-l,2,4-triazolo[l,5-a]pyrimidine-A -3)copper(II) were prepared (89POL2313). 

First a green coloration, then black precipitate of copper (II) thiocyanate is formed... 

Brown precipitate of copper (I) iodide, colored brown due to 13-Yellow precipitate of copper (II) cyanide, which then decomposes Black precipitate of copper (II) thiocyanate, which then decomposes... 

Potassium thiocyanate black precipitate of copper(II) thiocyanate ... 

Copper(II) thiocyanate can be transformed to copper(I) thiocyanate immediately by adding a suitable reducing agent. A saturated solution of sulphur dioxide is the most suitable reagent ... 

Copper sulphate solution first a green colouration, then a black precipitate of copper(II) thiocyanate is observed ... 

Black copper(II) thiocyanate turns red-brown on heating, and it is postulated that the product is derived from copper(I) thiocyanate distorted by the inclusion of thiocyanogen in the lattice (395). A zigzag chain structure analogous to AgSCN (492) has been suggested for CuNCS on the basis of their similar infrared spectra (502). 

Cu(NCS)2(trz)2] cannot be prepared from commercial Cu(NCS)2 because this substance is rather insoluble in most solvents and is usually very impure. A useful procedure is to start with freshly precipitated Cu(NCS)2, for instance from copper(U) nitrate and ammonium thiocyanate in water. Ammonium thiocyanate (0.2 mole, 15.22 g) in 50 mL of water is added to copper (II) nitrate trihydrate (0.1 mole, 24.16 g) in 100 mL of water. Copper(II) thiocyanate is precipitated immediately. After filtration and washing with water, it is dried under vacuum. The precipitate should be pitch-black any gray color is a sign of copper(I) thiocyanate. 

Thus prepared, copper(II) thiocyanate (0.05 mole, 8.99 g) is suspended in 100 mL of warm acetone. Then, 1,2,4-triazole (0.1 mole, 6.91 g) in 100 mL of warm acetone is added, and, after some stirring, the mixture is filtered and... 

In accord with the view that thiocyanogen may be regarded as a pseudohalogen, it has recently been shown that a wide range of aliphatic and steroidal ketones undergo a-thiocyanation when their solutions in methanol are stirred at room temperature with a suspension of copper(ii) thiocyanate (Scheme 53). Cyclic ketones, as well as undergoing thiocyanation, may also be converted into their dimethyl acetals, from which the free a-thiocyanato ketones are readily obtained by hydrolysis. 

CgHi2CuNgS2, 1 -(2-Aminoethyl)biguanide-isothiocyanato-copper(II) thiocyanate, 37B, 533... 

Cl7H20CUN6S2, Isothiocyanato-(1,7-bis-(2-pyridyl)-2,6-diazaheptane)-copper(II) thiocyanate, 38B, 927 C17H2 3ClFeN70flS2, (2,13-Dimethyl-3,6,9,13,18-penta-azabicyclo-[12.3.1loctadeca-1(18),2,12,14,16-pentaene)di-isothiocyanatoiron-(III) perchlorate, 41B, 1078... 

Copper(II) yields a black precipitate of copper(II) thiocyanate, which is transformed into copper(I) thiocyanate, itself dissolving into an excess of thiocyanate ions with the formation of the anionic complex Cu(SCN)2. The transformation cop-per(II) thiocyanate -> copper(I) thiocyanate is favored by the presence of reductants such as sulfite ions ... 

The irradiation of 1-naphthoxide anion in the presence of methoxide also gives a photodimer (301), by nucleophilic photosubstitution.1-Alkoxynaphthalene undergoes thiocyanation by the copper(ii) thiocyanate method to give (302), the... 

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