Transmetalation as a route to a cyclic heteronuclear bifunctional Lewis acid containing tin and gallium Academic Article uri icon

abstract

  • The reaction of equimolar quantities of 1,8-bistrimethylstannylnaphthalene (1) and GaCl3 in toluene yields a stannagallacycle, namely, bis(-1,8-naphthalenediyl)(-chloride)methyltin(IV)chlorogallium(III)(2). Compound 2 is insoluble in solvents of low polarity and has been characterized by EA, MSCI, and X-ray analysis. The latter revealed the existence of a folded eight-membered dimetallacycle as well as the presence of a chloride ligand bridging the two metals. When treated with pyridine, formation of a soluble bis(pyridine) adduct (3) occurs. Compound 3 has been characterized by EA and 1H, 13C, and 119Sn NMR spectroscopy. As shown by X-ray single-crystal analysis of 3, the central eight-membered dimetallacycle of the molecule has remained intact on going from 2 to 3. Compound 3 does not feature a bridging chloride, and its structure is that of a Lewis acid-Lewis base adduct in which two independent pyridine molecules coordinate the metal centers.

published proceedings

  • ORGANOMETALLICS

author list (cited authors)

  • Tschinkl, M., Hoefelmeyer, J. D., Cocker, T. M., Bachman, R. E., & Gabbai, F. P.

citation count

  • 25

complete list of authors

  • Tschinkl, M||Hoefelmeyer, JD||Cocker, TM||Bachman, RE||Gabbaii, FP

publication date

  • May 2000