Indium clustering

Indium clusters have also recently been characterized, notably in intermetallic compounds. Thus, the Zintl phase, Rbzinj, (prepared by direct reaction between the two metals at I530°C) has layers of octahedral closo-lnf, clusters joined into sheets through exo bonds at four coplanar vertices. These four In atoms are therefore each bonded to five neighbouring In atoms at the comers of a square-based pyramid, whereas the remaining two (Irans) In atoms in the Ine cluster... 

Metalloid Gallium Clusters GanRm< and Related Indium Clusters 2.3.4.2.1 The Modifications of Elemental Ga... 

Most of the divalent indium compounds appear in the dimeric form, which involves an indium-indium bonded species or R4hi2. The structure of the indium (11) hahdes has been identified, in which the divalent ln + ions is present in the dimeric species [hi2X6] A special highlight is the compound R4lu2 (R = CH(SiMc3)2, SiBu 3, SiBu 2Ph), which has a remarkable reactivity and is used in the preparation of various indium complexes including indium cluster compounds. ... 

Scheme 1 Reactions of (InR)4 to produce new indium clusters (R = C(SiMe3)3)...

The mixed-valent gold indium cluster [Au3ln3Cl6(dppe)2] is composed of In(I) and In(II) atoms. Synthetic details were presented in an earlier section. Insertion and redox reactions of In(I) halides have been described. For example, oxidative addition reactions of InX (X = Cl, Br, I) with PhSSPh yields indium(III) thiolates of the type (PhS)2lnX." Unexpected In(II) or In(III) products are common in reactions involving indium(I) halides, which result from facile disproportionation processes. Several such cases were described with divalent indium compounds. 

Smeeton T. M., Kappers M. J., Barnard J. S., Vickers M. E., Humphreys C. J. Electron-beam-induced strain within InGaN quantum wells False indium cluster detection in the transmission electron microscope Appl. Phys. Lett. 83, 5419 (2003). 

Figure 7. Structure of the Aujluj core of gold-indium clusters. Surrounding ligands are indicated schematically. The gold atoms are distinguished by their oxidation state.

Lerme, J., Dugourd, P., Hudgins, R.R., Jarrold, M.F., High-resolution ion mobiUty measurements of indium clusters electron spill-out in metal cluster anions and cations. Chem. Phys. Lett. 1999, 304, 19. 

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