Efficient synthesis of a high temperature of the polymerization catalyst and a polymerization catalyst systems Group 15 element-containing ligand for the production.
(A) at temperatures above 120. ° C., the preparation process of the ligand by reaction (I) carried out in the presence of a transition metal catalyst and a base;
[Formula 1]

(L is the 15 group element; the Y and Z Pnictogen; R ¹ and _^R 2 C 1 ~C 20 hydrocarbon group, a heteroatom containing group having up to 20 carbon atoms, silicon, germanium, tin, lead, or phosphorus; R ³ is hydrogen, a hydrocarbon group, a halogen, or a heteroatom containing group; R ⁶ and R ⁷ hydrogen, alkyl group, halogen, heteroatom or a hydrocarbyl group; ^X-1 is a leaving group); and,
(B) steps (a) ligand of the formula _^M n X n compound represented by prepared by (M is a Group 3 to 14 elements metal, X is an anionic group) step of mixing;
Method for producing a polymerization metal catalyst compound containing a Group 15 element having a.