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Indium reacts with both Ph,S, and Ph,Se, in refluxing toluene to give the compounds In(EPh), (E = S or Se) in high yield. Under similar conditions tin gives Sn( EPh),. Thallium reacts with Ph,Se, t o form TI(SePh), but does not react with Ph, S, . Neither zinc nor gallium reacts with Ph,S, or Ph,Se,. With mixtures of Ph, E, and I , , indium yields the previously unreported In1 (EPh), compounds. The reactions of In(SePh), are those of a typical indium(iii) Lewis acid. Possible factors affecting the reactions of metals with Ph,S, or Ph,Se, are briefly discussed.

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The electrochemical oxidation of anodic indium in non-aqueous solutions of a series of C&i q, ) gives the unusual indium(i) compounds In[SR(SH)], containing the alkanethiol(thio1ato) ligand. These compounds can be deprotonated by either NEt, or NBun40H to form salts of the [Inl(S,R)] -anion; this anionic complex can be oxidized b y I, to the corresponding indium(iii) species [Inllll,(S,R)] -, which can also be produced by successive I , oxidation and deprotonation of In ' [SR(SH)]. Reaction with the o-quinones 0-X4C60, gives the catecholato derivatives [In~11{SR(SH)}(0,C6X4-o)] (X = CI or Br). Carbon disulphide insertion occurs at only one In-S bond. With thallium, the products of electrochemical oxidation are TI,(S,R) in all the cases studied.