Inorganic compounds containing the trifluoroacetate group. Part III. Reactions of bis(trifluoroacetato)divinyltin with N-, O-, or N- and O-donor ligands, and the crystal structure of (2,2′-bipyridyl)bis(trifluoroacetato)divinyltin

Structural Tin Chemistry

“…89 (275), which is generally considered t o be coordinating. The carboxylate groups in this structure (390) bridge the three atoms of a stannioxane moiety as shown in Fig. 90.…”

“…The 2,2'-bipyridyl complex of diphcnyltin dichloride is in the expected trans-diphenyltin, cis, &distorted octahedron (410) shown in Fig. 106, while complexation of divinyltin bis(trif1uoroacetate) by bipyridyl converts the potentially bidentate acetato ligands t o a unidentate mode (390) as seen in Fig. 107, which should be compared t o the structures of the dimethyltin (398) and divinyltin stannoxane (389) in which the acetato group is bridging.…”

Bis[tetrakis(triphenylphosphine-κP)silver(I)] di-μ-trifluoroacetato-κ4O:O′-bis[bis(trifluoroacetato-κO)stannate(IV)]

“…The ability of two tri¯uoroacetatodimethylstannate ions to aggregate into a dianion can be attributed to enhanced Lewis acidity brought about by the electron-withdrawing tri¯uoroacetate group. Evidence of enhanced Lewis acidity of diorganotin bis(¯uoroacetates) comes from the isolation of stable complexes with , H -diimine ligands (Garner et al, 1975;Ng et al, 1999). The tri¯uoroacetate group is probably comparable in its electron-withdrawing ability to, for example, the chloride ion; several trichlorodimethylstannates that are doubly chlorine bridged into dianions are known (Matsubayashi et al, 1985;Lanfranchi et al, 1986;Teoh et al, 1992).…”