Nitrogen ligands with bulky substituents are currently attracting interest as tools for controlling the coordination gap aperture. Bis(imino)pyridines and a-diimines are particularly noteworthy in this context. It has been shown that bulky derivatives of N-ligands are highly sensitive to the rates of both chain propagation and of termination processes in polymerization, leading to high molecular weight polyolefins while sterically less demanding analogues produce oligomers. These results underline the importance of steric factors in designing the structure of ligands. Coordination chemistry with the tridentate hybrid ligand containing soft and hard backbone, such as P/N, N/N, etc, has been drawing an intensive research. We have endeavored to prepare a series of amido phosphinimine derivatives containing bulky substituents on both P- and N- atoms and their metal complexes. These complexes which have been well-characterized by solution multi nuclei NMR spectroscopic data and single crystal X-Ray diffractometer are potentially more rigid and robust to conquer the flexibility of the backbone.