Reactions of some ortho-tellurated compounds with intramolecular co-ordinate bonds

Supramolecular Aggregation Patterns and Stereochemical Consequences of Tellurium(Lone Pair)…π(Aryl) Interactions

“…With the exception of one structure, the remaining tellurium structures featuring Te(lone pair)···π (aryl) synthons, that is, 23-38 [38,[41][42][43][44][45][46][47][48][49][50][51][52][53] adopt one-dimensional aggregation patterns in their crystal structures, see Table 12.3 for data. There are basically two variations in that the majority, 11 examples, that is, 23-33, have the chains sustained by single Te(lone pair) ··π (aryl) interactions, whereas there are five examples whereby the chains are sustained by two Te(lone pair) .…”

“…Finally, four of the structures have linear topologies with a single example of a zig-zag topology, Table 12.3. There is a sole example of Te(lone pair)···π(aryl) interactions leading to a threedimensional architecture, that is, 39 [54], Scheme 12.6. Both tellurium atoms in this [42] 3.55 9.3 linear 25 [43] 3.62 6.9 helical 26 [44] 3.66 10.2 helical 27 [45] 3.71 13.1 helical 28 [46] 3.72 8.5 zig-zag 29 [47] 3.82 14.7 helical 30 [48] 3.86 12.2 helical 31 [49] 3.88 9.1 zig-zag 32 [48] 3.89 11.2 zig-zag 33 [38] 3 …”

Tellurium azamacrocycles: synthesis, characterization and coordination studies

“…The Te(1)-C (11) Allen et al [15] and with 2.125 (16) A observed for Te-C in 2-bromotelluro-N-(p-tolyl)benzylamine [16]. The angle C(11)-Te-C(21) is 96.34°and geometry around tellurium can be considered as V-shaped.…”

1-Iodo-2-p-tolyl-1-tellura-2-azaindene

“…In compound (III), the Te--C bond length is similar at 2.125 A, but the Te...N distance is significantly longer at 2.375 A,. If, as seems likely, the trans influence of Br is similar to that of C1 and I (McWhinnie, 1992), the difference in the Te...N separation between the title compound and compound (II) on the one hand, and compound (III) on the other, can be attributed (Maslakov et al, 1993) to the difference in hybridization state of the N atom: sp 2 in both the title compound and compound (II), and sp a in compound (III).…”

“…We report here the crystal structure of the title compound, (I), synthesized according to the method of Maksimenko, Sadekov, Maslakov, Mehrotra, Kompan, Struchkov, Lindeman & Minkin (1988), as part of an ongoing study of organotellurium compounds containing an N atom sterically capable of coordinating to the central Te atom. Previous work (McWhinnie, 1992;Maslakov, McWhinnie, Perry, Shaikh, McWhinnie & Hamor, 1993) (Maksimenko et al, 1988), and 2-(BrTe)C6H4CH2NH(C6HnMe-4), (HI) (Maslakov et al, 1993). In compound (II), which differs from the title compound only with respect to the nature of the attached halogen atom, the Te---C and Te...N distances are 2.098 and 2.229 A,, respectively, averaged over two independent molecules in the unit cell; these distances are virtually identical to the corresponding distances in the title compound.…”