Chlorido{2-[(dimethylamino)methyl]phenyl-κ²N,C¹}tellurium

Abstract

The crystal structure of the title compound, C9H12ClNTe, contains isolated mol­ecules with no close Te⋯Cl inter­molecular contacts and has the same composition as a previously published structure [Engman et al. (2004 ▶). Phospho­rus Sulfur Silicon Relat. Elem. 179, 285–292]. However, in this case, the compound has crystallized in a centrosymmetric space group, unlike the previously published structure which contained enanti­omerically pure chiral mol­ecules. In all other aspects, the metrical parameters are similar. The mol­ecules with a T-shaped coordination environment about the Te atom are linked into dimers by C—H⋯Cl inter­actions.

The Nature of Chalcogen‐Bonding‐Type Tellurium–Nitrogen Interactions: A First Experimental Structure from the Gas Phase

“…for the same benzylamine derivates [8] and Rakesh et al. crystallized a system containing N⋅⋅⋅Te−Cl units with a stronger interaction between nitrogen and tellurium atoms (2.355(3) Å in ClTe( o ‐C 6 H 4 )CH 2 NMe 2 ) [9] . In fact, the investigated systems describe donating interactions between the heavy atom tellurium and the nitrogen atom, but a substantial proof in the gas phase is still missing to exclude pure solid‐state effects.…”

“…[7] The stabilizing effect was demonstrated by Hammerl et al for the same benzylamine derivates [8] and Rakesh et al crystallized a system containing N•••TeÀCl units with a stronger interaction between nitrogen and tellurium atoms (2.355(3) in ClTe(o-C 6 H 4 )-CH 2 NMe 2 ). [9] In fact, the investigated systems describe donating interactions between the heavy atom tellurium and the nitrogen atom, but a substantial proof in the gas phase is still missing to exclude pure solid-state effects.For this purpose we now prepared (N,N-dimethylaminopropyl)(pentafluorophenyl)telluride (1) (Scheme 1). Its 125 Te-{ 1 H} NMR spectrum shows a triplet ( 3 J Te,F = 64 Hz) at 353 ppm.…”

Intramolecularly Coordinated 2‐Iminomethylphenyltellurium Compounds

“…Unlike its lighter congeners, some basic compound classes, including tellurenyl cations and tellurenyl (pseudo)halides, tellurium oxides, and tellurones as well as tellurinic and telluronic acids, have been established only in the last two decades . The stabilization of these tellurium compounds often relied on the judicious choice of aryl substituents containing intramolecularly coordinating N(sp 3 )‐donor ligands, such as the “one‐arm” 2‐dialkylaminomethylphenyl group ( I ), the “two‐arm” 2,6‐bis(dialkylaminomethylphenyl) group ( II ), and the “stiff‐arm” 8‐dialkylaminonaphthyl group ( III , Scheme ) , . These ligands are complemented by aryl substituents containing intramolecularly coordinating N(sp 2 )‐donor ligands, such as the 2‐pyridylphenyl group ( IV ), the 2‐oxazolinylphenyl group ( V ),, and the 2‐iminomethylphenyl group ( VI , Scheme ) , .…”

Influence of acidic media on the supramolecular aggregation of iso-tellurazole N-oxides

“…32 In X-1a-H, the Te-Br distances are slightly longer but the Te-Cl distances are much larger and fall at the long end of the range observed in cases in which the tellurium atom is engaged in intramolecular secondary bonding. [26][27][28][29][33][34][35][36] Each X-1a-H molecule is connected to a neighbor by hydrogen bonding to the halogen atom, which in turn is engaged in an interaction with the tellurium atom of the first molecule to a distance (d(Te···Cl) = 3.570, 3.656 Å, d(Te···Br) = 3.602, 3.693 Å) that is shorter than the Te-X sum of van der Waals radii (X = Cl: 3.81 Å, X = Br: 3.91 Å) but much longer than the corresponding single bond. These interactions propagate through the crystal forming infinite chains.…”