A series of copper (II) complexes of the title ligand are reported which exhibit both five- coordinate trigonal bipyramidal and pseudo-octahedral stereochemistries. Mixed stereochemistry complexes [Cu (NTBT) X] 2 [CuX4](X= Cl, Br),[Cu (NTBT) Br] 2 [Cu2Br6] CH3CN, and the complexes,, contain trigonal bipyramidal cations while six-coordinate structures are implicated in the Systems [Cu (NTBT) Br2] H2O and [Cu (NTBT)(H2O) ...