Monooxytellurane(IV) Derivatives ([10−Te−4(C3O)]). Syntheses and Molecular Structure of Triaryltelluronium Carboxylate Compounds

Bis(2,2‘-biphenylylene)tellurane (1)
undergoes
a ring-opening reaction on treatment with acetic and
benzoic acid to afford the triaryltelluronium carboxylate
derivatives [10−Te−4(C3O)] (2).
(2,2‘-Biphenylylene)(2-biphenylyl)benzoyloxytellurane (λ4-tellane)
(2a) and
(2,2‘-biphenylylene)(2-biphenylyl)acetyloxytellurane
(λ4-tellane) (2b) were subjected to X-ray
crystallographic
analysis, which revealed that they crystallize as monomers and dimers, respectively, and that their Te centers
have a distorted trigonal-bipyramidal bonding geometry.