Phthalate neodymium electron donor complex, preparing method and rare earth catalyst thereof

The present invention provides a formula (I) and their method of preparation of neodymium acid with an electron donor structure, formula, L is a root acid, D is an electron donating compound, 1 polybutadiene method. Experiments show that, using a rare earth catalyst of the present invention provides the isoprene polymerization product resulting from polymerization of cis 1,4-polyisoprene content of up to 95% at 0 ℃ ~ 80 ℃, the D diene polymerization product resulting from polymerization at 0 ℃ ~ 80 ℃, the cis-1,4-polybutadiene content of up to 99%. Nd2 (L) 3 · nD (I).