First detection of 2,2'-biphenylenediphenylsulfurane and -selenurane [10-M-4(C4), M = S, Se] by low temperature NMR experiments and isolation of the tellurane

Article abstract of DOI:10.1016/0040-4039(95)00401-W

Formation of 2,2'-biphenylenediphenylsulfurane and -selenurane was detected in the reactions of 2,2'-biphenylylenephenylchalcogenium compounds with phenyllithium by ¹H, ¹³C, ⁷⁷Se, and CH-COSY NMR studies at low temperature. Isolation of the tellurane (C) was reported as an example of the tellurane bearing four carbon ligands.