1,5-Bis[2,6-bis(2,4,6-triisopropylphenyl)phenyl]-2,3,4,6,7-pentatellura-1,5-distannabicyclo[3.1.1]heptane

Abstract

The title compound, [Sn2(C72H98)Te2(Te3)], has a cage-like structure with bulky aryl substituents on the Sn atoms. The mol­ecule sits over a crystallographic twofold axis, and hence the asymmetric unit consists of one half-mol­ecule. Due to the twofold axis, the tritelluride part has a 1:1 disorder. One of the six-membered rings has a boat conformation, whereas the other has a chair conformation. The ditelluradistannane ring has a bent structure, with a dihedral angle of 32.89 (2)° between the two Te—Sn—Te planes.

Planar P6E6 (E = Se, S) macrocycles incorporating P2N2 scaffolds

“…§ To our knowledge, the only other structurally characterised cyclic tritelluride is the binuclear Sn(IV) complex [ArSn(μ-Te) 2 (μ-TeTeTe)SnAr] (Ar = 2,6-bis(2,4,6-triisopropylphenyl)phenyl). 19 The structurally characterised acyclic tritellurides incorporate either bulky substituents RTeTeTeR (R = C(SiMe 3 ) 3 ) 20 or intramolecular N···Te coordination (2-pyridyl-C 6 H 5 , 21 has also been reported. 23 The mean Te-Te bond length of 2.716 (1) Å and Te-Te-Te bond angle of 104.50(1)° in 4 are comparable to the corresponding values of 2.705…”

Intramolekular koordinierte Organozinntelluride: stabil oder labil?

“…Kürzlich wurde auch über Verbindungen der Zusammensetzung R 2 Sn 2 Te 5 mit sterisch anspruchsvollen Arylsubstituenten berichtet. [7] Alle diese Verbindungen enthalten jedoch einfach gebundene Chalkogenatome in den verbrückenden Positionen, und die meisten Untersuchungen sind auf Sulfide und Selenide beschränkt (Schema S1 Sn,Te = 2.77 ). [10] Der Sn2-Te2-Abstand (2.6110(4) ) ist vergleichbar mit den in Diarylzinntelluronen gefunden Bindungslängen für terminale Sn-Te-Bindungen (2.5705(6)-2.618(1) ).…”

Intramolecularly Coordinated Organotin Tellurides: Stable or Unstable?

“…Compound 2 is the first example of a structurally characterized telluride of low-valent Group 14 elements. The Sn1À Te1 (2.8218 (7) ) and Sn2 À Te1 (2.8334(8) ) bond lengths are similar and fall in the range expected for a Sn À Te single bond (sum of covalent radii S cov (Sn,Te) = 2.77 ). [10] The C1-Sn1-Te1 (95.1(2)8) and C13-Sn2-Te1 (95.0(2)8) angles are very similar to the C-Sn-E angles (range of 95.0(3)8) in the organotin(II) chalcogenides [9] and indicate that the s character of the lone pair is rather similar in these compounds.…”

“…[6] Recently, compounds with the composition of R 2 Sn 2 Te 5 were isolated (R = bulky aryl substituent). [7] All of these structures, however, contain chalcogen atoms in the bridging positions with an M À E single bond, and most investigations are limited to sulfides or selenides (Supporting Information, Scheme S1). The corresponding tellurium compounds have not been investigated in detail, which is probably due to their thermal instability and sensitivity towards light.…”

“…Recently, we have reported the organotin(I) compound [2,6-(Me 2 NCH 2 ) 2 C 6 H 3 Sn] 2 (1) and shown that the employment of intramolecularly coordinating pincer-type ligand is an alternative concept to the use of sterically demanding substituents for the stabilization of reactive distannyne derivatives. [8] 7 ]. [9] In the course of systematic studies on the reactivity of distannyne 1, we present here its reaction with elemental tellurium as a step-wise oxidation of the tin(I) atom (Scheme 1).…”