889859-93-2Relevant academic research and scientific papers
The first O,C,S-coordinating pincer-type ligand and its application to the synthesis of a triorganotin cation stabilized by two different donor atoms
Fischer, Jan,Schuermann, Markus,Mehring, Michael,Zachwieja, Uwe,Jurkschat, Klaus
, p. 2886 - 2893 (2006)
The syntheses and molecular structures of the bromo-substituted triarylphosphane sulfide (3-Br-5-t-Bu-C6H3)P(S)Ph 2 (1), the arylphosphonic acid di-isopropyl ester {3-t-Bu-5-[P(S)Ph2]-C6H3}P(O)(O-i-Pr) 2 (2), its triphenyltin derivative {5-t-Bu-3-[P(S)Ph 2]-2-(SnPh3)-C6H2}P(O)(O-i-Pr) 2 (3), and the corresponding triorganostannylium salt {4-t-Bu-2-[P(O)(O-i-Pr)2]-6-[P(S)Ph2]-C6H 2}SnPh2+PF6- (4) are reported. By reaction with bromide ion, the latter is converted in situ to the intramolecularly coordinated benzoxaphosphastannole derivative [1(P),3(Sn)-SnPh2OP(O)(O-i-Pr)-6-t-Bu-4-P(S)Ph2]C 6H2 (5). Ab initio MO calculations on the ethoxy-substituted analogue of compound 4 indicate a reduced positive charge at the tin atom in comparison with previously reported {4-t-Bu-2,6-[P(O)(OEt) 2]2C6H2}SnPh2 +PF6-.
