syn-Bimane as a chelating O-donor ligand for palladium(II)
A cationic Pd(II) complex containing syn-(Me,Me)bimane as a ligand was prepared and fully characterized. This complex represents the first well-defined case of a bimane scaffold coordinated to a metal center. The strongly-fluorescent syn-bimane chelates the Pd(II) center via its carbonyl oxygen atoms, affording a non-fluorescent complex. The crystal structure of this complex shows that the coordinated bimane departs from planarity, with its bicyclic framework bent about the N–N bond. Spectroscopic evidence demonstrates that bimane coordination is reversible in solution.