DIORGANOINDIUM FLUORIDES - CRYSTAL-STRUCTURES OF [IPR2IN(THF)2] [BF4] AND (MESBO)3

The reaction of In(CH2Ph)3 and InMes3 with BF3.OEt2 forms the corresponding monofluorides (PhCH2)2InF (1) and Mes2InF (2), while [(i)Pr2In][BF4](3) is precipitating, when BF3.OEt2 is given to a solution of In((i)Pr)3 in ether. 3 can be recrystallized from an Et2O-THF-mixture as colorless needles of [(i)Pr2In(THF)2][BF4](4). An X-ray structure determination of 4 shows [(i)Pr2In(THF)2]+-ions, bridged by [BF4]--ions, forming infinite chains of cations and anions. During the reaction to Mes2InF (2), (MesBo)3 (5) was formed. An X-ray structure determination of 5 shows the basic six-membered B-O-ring in it to be almost planar.