A-Cyanide complexes

RuCl2(=CCl2)(CO)(PPh3)2 reacts with NH3 to give a cyanide complex, RuCl(CN)(CO)(NH3)(PPh3)2, presumably via a CNH complex which is deprotonated (19). 

Falkner and Edmond [334] determined gold at femtomolar quantities in seawater by flow injection inductively coupled plasma quadrupole mass spectrometry. The technique involves preconcentration by anion exchange of gold as a cyanide complex, [AulCNjj], using 195Au radiotracer (ti/2 = 183 days) to monitor recoveries. Samples are then introduced by flow injection into an inductively coupled plasma quadrupole mass spectrometer for analysis. The method has a detection limit of 10 fM for 4 litres of seawater preconcentrated to 1 ml, and a relative precision of 15% at the 100 fM level. 

Cadmium carbonate forms a cyanide complex ion, Cd(CN)42+ in cyanide solutions. It dissolves in concentrated aqueous solutions of ammonium salts forming ammonium complexes. 

Fig. 6 Photocurrent/potential characteristics for Ti02 ( ), and rhenium ( ) and iron (A) cyanide complexed Ti02 electrodes. The Ti02 was illuminated by UV (380 nm), the others by visible light.

Fig. 7 Photocurrent efficiency (charge transfer/photon flux) of rhenium (ig)and iron (A)cyanide complexed Ti02 photoelectrodes with that of untreated Ti02 ( )for comparison. The extension of the spectral response into the visible is evident.

Formation of Carbon-Transition and Inner Transition Metal Bond 5 8.2.8.6. ri a-Cyanide Complexes... 

Blair-Johnson M, Eiedler T, Eenna R. Human myeloperoxidase structure of a cyanide complex and its interaction with bromide and thiocyanate substrates at 1.9 A resolution. Biochemistry 2001 40 13990-13997. 

The dicyanophosphide(l-) ion P(CN)2 may be viewed as a homolog of the dicyanoamide(l-) ion N(CN)2 and related to the thiocyanate ion SCN in the series of (pseudo)halide ions E(CN)7 n = group number of element E). In this sense it can be used in reactions with various kinds of electrophiles to introduce the P(CN)2 group. It may also be viewed as a cyanide complex of cyanophosphinidene PCN or of the phosphorus(I) cation P+, thus, strong nucleophiles replace one or both cyanide ions. ... 

An aqueous solution containing Pb and Cd can be titrated using EDTA. If an excess of cyanide is added to the solution, the cadmium is said to be masked by the formation of a cyanide complex. Suppose 20.00 mL of a solution containing only lead and cadmium is first titrated against 45.94 mL of a 0.02000 M solution of EDTA. After adding an excess of sodium cyanide, only 34.87 mL of the same EDTA solution produces an end point. Calculate the molarities of both the lead and the cadmium in the original solution. 

Cyanide can combine with the oxidized form of cytochrome a. However, the oxidized cytochrome a-cyanide complex can be reduced by dithionite or reduced cytochrome c and the resulting spectrum is the same as that of the reduced cytochrome a-cyanide complex which has the same absorption peaks as reduced cytochrome a but the optical den-... 

---