It is a colorless solid that is soluble in organic solvents.

Ta(NMe2)5 is prepared by treating TaCl5 with lithium dimethylamide.

[1] The preparation is similar to that for tetrakis(dimethylamido)titanium.

The compound has idealized D3h symmetry (ignoring the organic substituents).

The complex effects C-alkylation of secondary amines with 1-alkenes [2] and hydroaminoalkylation of olefins to form alkylamines.