Cu 4 Ti 4 -oxo clusters functionalized by in situ - generated 2,2'-biphenolate ligands from the oxidative coupling of phenols.

Herein, we report a twisted cubic Cu(I)Ti(IV)-oxo cluster stabilized by - formed 2,2'-biphenolate ligands from the oxidative coupling of phenols. The 2,2'-biphenolate-functionalized Cu(I)Ti(IV)O cluster shows short Cu⋯C contacts and exhibits smaller HOMO-LUMO gaps than those of reported Ti(IV)O.