A paper chromatographic investigation of the thiourea complexes of copper(I) silver(I) and gold(I)

✍ Scribed by Giuseppe Marcotrigiano; Giorgio Peyronel; Raffaele Battistuzzi

• Publisher: Elsevier Science
• Year: 1972
• Tongue: English
• Weight: 688 KB
• Volume: 65
• Category: Article
• ISSN: 1873-3778
• DOI: 10.1016/s0021-9673(00)92565-2

✦ Synopsis

Several thiourea complexes of formula MIT-A

(MI = Cu( I), Ag(1) and A =ClO,,, BF,, CF,COO, CH,COO or HCOO ; or MI = Au(I) and A = ClO,, BF,, CF,CQO, Cl orRr ; Tu = thiourea) were prepared ; the maximumTu: M ratio is 3 : I for Cu( I) and Ag( I) and 2: I for Au(I). The same maximum of 3 : I is observed on high frequency titration of the Ag(1) salts with thiourea in methyl cellosolve. Some of these complexes, undecomposed and in compact spots, may be eluted on chromatographic paper with a mixture of ketones and an aqueous solution of the corresponding sodium salt, or with a mixture of alcohols and an aqueous solution of 'the corresponding free acid. The Tu : M ratio is 5: 2 for Cu(1) perchlorate and fluoroborate in ketones, while it is always 2 : I for the other complexes of Cu(I), Ag(1) and Au(I), irrespective of the anion, the solvent and the amount of aqueous solution in the mixture. The composition of the eluted complexes was determined by a radiochemical method after exchange with 3YXabelled thiourea. The Rp values of the eluted complexes depend on the anion, the solvent and the amount of aqueous solutions in the mixture. G. MARCOTRIGIANO, G. PEYRONEL, R. BATTISTUZZI 425-431 , PC OF TJ-IE TX-IIOURZA COMPLEXES b17 &(I), Ag(1) AND Au(I) 427 I\N,\LY'~JCh\L DA%A FOR 'l'I.IB COMPLEX&S ___~ Colnporlnd Fou~nd (%) Metal N s Calcaclated ( O!) Metal N s Cu'ru,C10,~ J&oa cu,Tu,(c104) z'I-I,Ob cu'ru,c1o, CuTu,BT;,