Metal–Halogen Secondary Bonding in a 2,5‐Dichlorohydroquinonate Cobalt(II) Complex: Insight into Substrate Coordination in the Chlorohydroquinone Dioxygenase PcpA

Despite the unprecedented selectivity of the hydroquinone ring‐cleaving dioxygenase PcpA for ortho ‐chlorohydroquinones, there are no examples of an ortho ‐chlorohydroquinone bound to a transition‐metal complex. Herein, the synthesis and characterization of (Tp Ph2 Co) 2 (μ‐2,5‐dichlorohydroquinonate), for which Tp Ph2 is tris(3,5‐diphenylpyrazolyl)borate, were explored. The dianionic 2,5‐dichlorohydroquinonate bridges two (Tp Ph2 Co) moieties...