The complexes (C6F5)2TlX [X = MeCOCHCOMe (acac), CF3COCHCOMe (tfac), CF8COCHCOCF3 (hfac), PhCOCHCOMe (bzac), PhCOCHCOPh (dbm), or quinolin-8- olate (oxinate or ox)], have been prepared by reactions
between bromobis(pentafluorophenyl)thallium(III) and the appropriate sodium or
thallous β-diketonates or sodium quinolin-8-olate,
and react with equimolar amounts of 1,10-phenanthroline (phen)
or 2,2?-bipyridyl (bipy) to give the complexes (C6F5)2-
(phen or bipy)TlX (X = acac, tfac, or hfac), (C6F5)2(phen)TlX (X = bzac,
dbm, or ox), but not (C6F5)2(bipy)TlX (X = bzac, dbm, or ox). On reaction with triphenyl- phosphine oxide or
triphenylarsine oxide, the complexes (C6F5)2(Ph3PO or Ph3AsO)-TlX (X = acac, tfac, hfac, or dbm) and (C6F5)2Ph3AsOTl(ox)
have been obtained. From conductance and molecular weight measurements and
spectroscopic data, the complexes (C6F5)2TlX (except X = ox), (C6F5)2(Ph3PO or Ph3AsO)TlX, and (C6F5)2(phen or bipy)TlX, are considered
to be monomeric with chelated β-diketonate or oxinate groups, and hence to
contain four-, five-, and six-coordinate thallium respectively, whereas (C6F5)2Tl(ox) is considered to have an associated
structure with bridging oxinate groups.
