75593-85-0Relevant articles and documents
Organotin compounds containing a bulky (Me3Si)3C or related ligand. Crystal structures of {(Me3Si)3CMe(O2NO)Sn}2O, (PhMe2Si)3CSnMeCl2 and (PhMe2Si)3CSnCl3
Al-Juaid, Salih S.,Al-Rawi, Mustafa,Eaborn, Colin,Hitchcock, Peter B.,Smith, J. David
, p. 215 - 226 (2007/10/03)
Some compounds having very bulky ligands, mainly (Me3Si)3C (denoted by Tsi) or (PhMe2Si)3C (denoted by Tpsi), attached to functional tin centres have been studied. Treatment of TsiSnR2Cl, R=Me or Ph, with one equivalent of ICl gave the corresponding chloride TsiSnRCl2, and use of an excess of ICl gave TsiSnCl3 in both cases. Reaction of either chloride with one equivalent of Br2 gave the dibromide TsiSnRBr2; when an excess of Br2 was used TsiSnMe2Cl still gave the dibromide but TsiSiPh2Cl gave the tribromide TsiSnBr3. Reaction of TsiSnMe2Br with AgSCN or Ag2O gave TsiSnMe2NCS and (TsiSnMe2)2O, respectively, but when the crude product from the reaction of TsiSnMeBr2 with AgNO3 was recrystallized from MeOH the nitrato-oxide {TsiMe(O2NO)Sn}2O was obtained. In a seemingly previously unreported type of reaction, the alkoxide TsiSnMe2OEt reacted with ICl, Br2, or I2 to give TsiSnMe2X, X=Cl, Br, or I, respectively, and Bu3SnOEt likewise reacted with ICl to give Bu3SnCl. The chlorides TsiSnMe2Cl and TsiSnMeCl2 gave the hydrides TsiSnMe2H and TsiSnMeH2 on treatment with LiAlH4, but in the case of TpsiSnMe2Cl the Tpsi-Sn bond was cleaved to give TpsiH. The compound (Me3Si)2C(SnMe2Ph)(SiMe2Cl) reacted with a 1 M proportion of AgBF4 in CH2Cl2 with cleavage of the Sn-Ph bond to give the difluoride (Me3Si)2C(SnMe2F)(SiMe2F). The crystal structures of the monomeric compounds {TsiMe(O2NO)Sn}2O, TpsiSnMeCl2 and TpsiSnCl3 are reported; {TsiMe(O2NO)Sn}2O provides the first example of unidentate bonding of an NO3 group to four-coordinate tin.
