Gold-mercury derivatives

All of these complexes display a strong visible luminescence under UV excitation, which is sensitive to the interaction of the gold atoms with the mercury centers. Thus in Hg(-C,C-C6F4 ]3([AuC(0-R)=NR ]3)2 and Hg (p.-C,C-C6F4)3([Au(p,-C2,N3-Rim)]3)2 ra an increase of the intensity upon coordination of mercury to the starting gold materials was observed. 

As we have seen, in the last years it has been shown that gold is an element that allows the formation of supramolecular structures built through 

Greenwood, A. Earnshaw, Chemistry of the Elements, 2nd ed., Butterworth-Heinemann Woburn, MA, 1173 (1997). 

Schmidbaur, ed., Gold Progress in Chemistry, Biochemistry and Technology, John Wiley Sons, Ltd., Chichester, 1999. 

for example A. Heine, R. Herbst-Irmer, D. Stalke, J. Chem. Soc. Chem. Commun., 1729 (1993). 

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In the elucidation of the X-ray structure of hCP by the method of isomorphous replacement, gold and mercury heavy atom derivatives were utilized. In the case of the mercury derivative, p-chloromercury-benzoate, the heavy atom bound to the free sulphydryl residue, C221, but for the gold cyanide derivative the gold atom was found to bind in the vicinity of the trinuclear copper cluster. A realistic explanation of this... 

Stacking in all of these complexes is the result of additional intermolecular aurophilic interactions between four of the six Au1 atoms in adjacent units giving rise to stacked linear-chain structures with a -BBABBA- pattern. The intermolecular Au1- -Au1 distances, between 3.0658(7) and 3.3298(5) A, are usually similar or slightly shorter (in the case of the mercury derivative) than the intramolecular ones, with average distances between 3.08 and 3.493 A (see Table XXI). Only in the case of the TCNQ derivative the intermolecular aurophilic contacts (3.152 A) are clearly shorter than the intramolecular ones (3.457, 3.471 and 3.534 A), which could be ascribed to charge-transfer from the electron-rich gold center to the electron acceptor TCNQ. 

The stibonmm halides form double compounds vdth the halides of gold, mercury, bismuth and platinum. Taken on the whole the stibonium compounds are less deliquescent than the arsonium derivatives. 

As seen above, compounds of the type R2Fe(CO)4 with iron-carbon a bonds are known only when R is a perfluoroalkyl radical or a maleoyl radical. However, compounds of this type where the iron atom is a-bonded to an element other than carbon, are somewhat more common. Derivatives are known in which the iron atom is cr-bonded to gold, mercury, tin, and lead. 

IH of alkynylamines has been performed with a variety of catalytic systems based on palladium [274-281], cobalt, rhodium, iridium, ruthenium, platinum, copper, silver, zinc, cadmium, mercury [279-281], nickel [279-282], gold [279-281, 283], and molybdenum [284] derivatives. 

The reaction of these platinum or palladium clusters with transition metal compounds has also been studied and many cluster derivatives have been prepared for this method, which included reactions with gold,3 02-3306 silver, 302,33 3,3307-3310 copper 3302,3303,3309-3311 Qr mercury com ... 

See Gold(III) chloride Ammonia Mercury Ammonia Potassium triamidothallate ammoniate Silver azide Ammonia Silver chloride Ammonia Silver nitrate Ammonia Silver(I) oxide Ammonia See N-METAL DERIVATIVES... 

Although the description fulminating is not used and thus confusion with the fulminate not caused, mercury also forms explosive compounds of similar nature. The nitride (ibid.) is the most common and can be formed from the metal and ammonia in some circumstances, causing accidents where mercury manometers are used with ammonia. Halo-hydroxy- and oxy-nitrides can also be involved [3], See METAL FULMINATES, GOLD COMPOUNDS, A-METAL DERIVATIVES, PRECIOUS METAL DERIVATIVES, SILVER COMPOUNDS... 

This class of compounds showing explosive instability deals with heavy metals bonded to elements other than nitrogen and contains the separately treated groups GOLD COMPOUNDS LEAD SALTS OF NITRO COMPOUNDS LITHIUM PERALKYLURANATES MERCURY COMPOUNDS METAL ACETYLIDES METAL FULMINATES METAL OXALATES PLATINUM COMPOUNDS PRECIOUS METAL DERIVATIVES SILVER COMPOUNDS... 

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