The peculiar electronic structure of scandium phosphinoalkylidene complex [LSc{C(SiMe3)PPh2}THF] (L=[MeC(NDIPP)CHC(NDIPP)Me](-)), DIPP=2,6-(Pr-i)(2)C6H3) leads to an interesting versatile reactivity, which is demonstrated both experimentally and computationally. The complex undergoes [2+2] cycloaddition reactions with alkynes, and easily activates various XO bonds such as CO of propylene oxide, NO of 3,5-dimethylisoxazole, BO of pinacolborane and SiO of triethoxysilane. These reactions occur on the ScC bond of the phosphinoalkylidene complex. Interestingly, the ScP bond can also be activated as the presence of a ScCP three center interaction in the complex allows performing CF activation of 2,6-difluoropyridine and 1,2 addition with imine or ketone. The complex also reacts with metal complexes, [(COD)RhCl](2) and (Ph3P)AuCl, to form structural intriguing heterobimetallic complexes.