Reference

The recovery of silver cyanide from galvanic silver baths

The recovery of silver cyanide from galvanic silver baths. Schlegel, Hans (Geislingen, Ger.). Jahrb. Oberflaechentech., 31, 169-72 (German) 1975. CODEN: JBOFAN. DOCUMENT TYPE: Journal CA Section: 60 (Sewage and Wastes) Section cross-reference(s): 72 In galvanic Ag baths, the Ag occurs as a complex alkali Ag cyanide. This complex in aq. soln. is treated with HNO3. The difficulty sol.There are some reagents with their cas registry numbers 7697-37-2 and 506-64-9 are used in this study. AgCN is pptd. The HCN liberated escapes. The pptd. AgCN dissocs. into Ag(CN)2-. The Ks = [Ag+][Ag(CN)2-] can be calcd. at room temp., the soly. lies between 4.15 .times. 10-6 and 4.86 .times. 10-6 mole AgCN/l. which corresponds to .apprx.0.6 mg AgCN/l. .

Germanium(II) pseudohalides: Ge(CN)2, Ge(NCO)2 and Ge(NCS)2; syntheses and reactivities

Germanium(II) pseudohalides: Ge(CN)2, Ge(NCO)2 and Ge(NCS)2; syntheses and reactivities. Onyszchuk, Mario; Castel, Annie; Riviere, Pierre; Satge, Jacques (Lab. Chim. Organominer.Chemicals with cas numbers 506-64-9 and 7440-56-4 also play role., Univ. Paul Sabatier, Toulouse 31062, Fr.). J. Organomet. Chem., 317(3), C35-C37 (English) 1986. CODEN: JORCAI. ISSN: 0022-328X. DOCUMENT TYPE: Journal CA Section: 78 (Inorganic Chemicals and Reactions) Section cross-reference(s): 29 The hitherto unknown Ge(II) pseudohalides: Ge(CN)2, Ge(NCO)2 and Ge(NCS)2, were prepd. by reactions of Ge(II) halides with corresponding Ag and K salts; they are stable in THF or acetone soln. in which they are extremely sensitive to moisture, and they undergo cycloaddn., insertion, and Lewis acid-base reactions characteristic of highly reactive germylenes. IR spectra indicate that in THF soln. Ge(CN)2 is the normal cyanide, whereas Ge(NCO)2 and Ge(NCS)2 are the isocyanate and isothiocyanate, resp. .