Potassium hexachloroiridate

Potassium hexachloroiridate (IV) [16920-56-2] M 483.1. Crystd from hot aqueous solution containing a few drops of HNO3. 

A 100-mL, two-necked flask with 24/40 T joints is charged with potassium hexachloroiridate(IV) (2.0 g, 4.1 mmole), concentrated hydrochloric acid (10... 

Determine the molar mass of (a) potassium hexachloroiridate(IV), K2lrCl6, and (b) the molar mass of trifluorosilane, SiHF3. 

Potassium hexachloroiridate(IV) does not exist as discrete molecules represented by the empirical formula, but trifluorosilane does. The term molar mass in either case refers to the mass of /V4 formula units, which in grams is... 

In about 4 hours all the insoluble hexachloroiridate(III) is transformed into a soluble compoundf and a red-brown solution is obtained. The heating is not suspended, and the current of CO is increased from one bubble every 2 seconds to about two bubbles every 1 second and maintained at that rate until the solution is cold. Now 2.9 g. (17.7 mmoles) of finely ground potassium carbonate is added, and the solution is vigorously stirred at room temperature for about 40 hours, maintaining the current of CO, and then it is filtered in an inert atmosphere (nitrogen or carbon monoxide). The filtrate is set aside under nitrogen. 

Nitrosylpentaamminecobalt(II) chloride, synthesis 49 cts-Bromoamminebis (ethylenediamine) cobal t (111) bromide, CIS- and trans-aquoamminebis(ethylenediamine)cobalt(IIl) bromide, and cis- and triphenylphosphine)rhodium and chloro-carbonylbis(triphenylarsine)rhodium, synthesis 56 Sodium hexachlororhodate(III) 2-hydrate and potassium hexachlororhodate(III) 1-hydrate, synthesis 57 Ammonium hexachloroiridate(IV), synthesis 58 Resolution of the tris(l,10-phenanthroline)nickel(II) ion, synthesis 59... 

Potassium hexachloroiridate (IV) (K2lrCl6) [16920-56-2] M 522.2. Crystallise it from hot aqueous solution containing a few drops of HNO3 to keep it in the oxidised state. It forms small shiny red-black octahedral crystals which are dried at 100° and give a red powder on grinding [Gmbe in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol II pp 1593-15941965. ... 

Recent x-ray powder data indicate that K2lr2(CO)4Ci4.s and presumably the bromo and iodo analogue are in fact K o-6lr(CO)2X2 with KX impurities (515). In 1970 Cleare and Griffith (94) reported that the reaction of concentrated hydrohalic and formic acids with hexachloroiridate(IV) results in the formation of diamagnetic needle crystals of [ 2(00)4X4]- stoichiometry which exhibit a metallic luster. In accord with the work of Malatesta and Canziani (283) they prepared the bromo complexes as well as complexes containing different cations. Table X. The chloro potassium salt exhibits Vco absorptions at 2115, 2080, and 1985 cm i while the bromo tetraphenylarsonium salt exhibits Vco absorbances at 2105,2085,2047, and 1957 cm-i. To account for the observed diamagnetism they proposed a planar tetranuclear structure, [Ir4-(CO)sX8]2", based on the structure of the isoelectronic Re4(CO) ion. 

Potassium hexachloroiridate (III) [14024-41-1] M 483.1. Crystallise it from hot aqueous solution,... 

We have already studied the pure quadrupole resonance of halogens in potassium hexahaloplatinate(IV) (1), hexachloroiridate(IV), and hexachloro-... 

The voltammetric response arises as the amount of C is increased which is attributed to the oxygenated species of the GO in this case [106]. Bear in mind that this response is unique to hexaammine-ruthenium(III) chloride and also occurs to a lesser extent for potassium hexachloroiridate(III) [106]. Crucially, the observed voltammetric reduction waves evident in Fig. 3.28 coupled with the voltammetry observed in Fig. 3.29 can be used as a measure to determine whether GO has been efficiently (electrochemically) reduced prior to its application in a plethora of areas [105, 106]. 

Potassium hexachloroiridate(IV) and potassium hexacyanoferrate(III) were obtained commercially and used directly. Tris-(2,2-bipyridyl)iron(II) perchlorate was synthesized according to Reference 13. Catechol(1,2-di-hydroxygenzene), L dopa(3- 3,4-dihydroxyphenyl)alanine), and tiron(l,2-dihydroxybenzene-3,5 disulphonic acid) were obtained commercially. 

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