The insertion of chalcogen atoms into the InIn bond of tetrakis[bis(trimethylsilyl)methyl]diindane(4): monomeric compounds with InSIn, InSeIn, and InTeIn groups

Abstract

The insertion of chalcogen atoms into the indium-indium bond of tetrakis[bis(trimethylsilyl)methyl]diindane(4)( 1) by the reaction of 1 with the chalcogen atom donors propylene sulphide, triethyl phosphonium selenide or telluride yields homoleptic compounds with up to now unknown R 2InSInR 2 ( 2), R 2InSeInR 2 ( 3), and R 2InTeInR 2 ( 4) groups. All products are monomeric, both in solution and in the solid state, as shown by the cryoscopically determined molar masses and crystal structure determinations. The indium-chalcogen-indium bridges are bent and exhibit angles of 112.4(1) and 116.8(2)° ( 2), 109.96(3)° ( 3), and 105.42(2)° ( 4).