The reaction of cyclopentadienylindium(I) with equimolar quantities of HX and [NEt4]X in organic media yields crystalline [NEt4][InX2](X = Cl, Br, or I). Vibrational spectroscopy shows that these new indium(I) species are bent monomeric anions (cf. SnX2). A new salt of the previously identified anion[InI3]2– has also been obtained by this route. Salts of [InI2]– and [InI3]2– can also be prepared electrochemically. Metathetical reactions give rise to [In(NCO)2]–, [In(NCS)2]–, and [In(NCS)3]2–; bridging by the ligands may be an important feature of the structure of salts of these anions.
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Journal of the Chemical Society, Dalton Transactions
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