Metal-halide complexes of Ti, V, Y, Zr, Al, Ga, and U supported by the tetradentate monoanionic (TIDMA) ligand bis(2-picolyl)(2-hydroxy-3,5-di-tert-butylbenzyl)amine, H(BIPPA), were synthesized and spectroscopically characterized. In addition, the complexes (BPPA)TiCl2, (BPPA)VBr2, [(BPPA)YCl2](2), (BPPA)GaCl2, (BPPA)GaCl2, and (BPPA)Ul(3) were characterized by single-crystal X-ray crystallography. In all cases the ligand is bound K-4 to the metal center. All structurally characterized compounds are monomeric in the solid-state with the exception of [(BPPA)YCl2](2), which exists as a dimer in the solid-state. The metal-alkyl complexes (BPPA)AIMe(2) and (BPPA)Zr(CH2Ph)(3) were also synthesized and characterized, and an X-ray structure of (BPPA)Zr(CH2Ph)3 was obtained. The transformation of BPPA from a monoanionic to a dianionic ligand via proton abstraction was observed and monitored by NMR spectroscopy.