Coordination chemistry in anhydrous monovalent metallic formates. II. The crystal structure of anhydrous thallium(I) formate TlHCOO

Thallophilic Interactions in Aryloxide Compounds: the {Tl2(μ2-OAr)4} Structural Motif in (TlOAr)4 and Tl2Cu(OAr)4 Compounds

“…37 Bonding between thallium atoms in compounds with oxygen atom donor ligands has been much less frequently observed and only recently reviewed. 11 Thallium compounds with oxygen donors and Tl‚‚‚Tl contacts of less than 4 Å have been observed in Tl(III) systems, 38,39 carboxylates, 37,40 acetylacetonates, 7,41 a few aryloxide systems, 42,43 and a small group of other ligands. [44][45][46][47][48][49] We have discovered a new structural motif for thallium aryloxides with a prominent thallophilic interaction and herein report its structural and spectroscopic characterization in three new compounds and a theoretical description of the electronic structure.…”

Trithallium(I) phosphate, an optical second-harmonic generator

“…oxygen atom at 3.26 A. Thallium and oxygen exhibit a variety of coordination numbers in other compounds with a range of distances; the shortest values are comparable to those reported here. In TIEHPO 4 (Oddon, Vignalou, Transquard & P+pe, 1979) the T1-O distances for four kinds of T1 atoms range from 2.51 to 3.17/~; in TIEWO 4 (Okada, Ossaka & Iwaii, 1979) the two shortest distances are 2.46 (6) and 2.70 (7) A; and in TI(HCOO) (Oddon, Tranquard & Mentzen, 1981) the T1-O distance is 2.56/l. In all these cases the distances less than 2.7 A, involve no more than three oxygen neighbors per thallium ion.…”