Phosphate-pyrimidine zinc dichloride complex with catalytic performance as well as preparation method and application of phosphate-pyrimidine zinc dichloride complex

Abstract

The invention relates to a phosphoric acid-pyrimidine zinc dichloride complex with catalytic performance and a preparation method and an application thereof, the molecular formula of the phosphoric acid-pyrimidine zinc dichloride complex is C12H18Cl2N4O6P2Zn, the phosphoric acid-pyrimidine zinc dichloride complex is a monoclinic system, and a space group of the phosphoric acid-pyrimidine zinc dichloride complex is P212121; the preparation method comprises the following steps: synthesizing an organic ligand by taking 2-bromopyrimidine and dimethyl phosphite as raw materials, and coordinating the ligand with zinc dichloride to prepare a phosphoric acid-pyrimidine zinc dichloride complex. When the complex is used as a catalyst to catalyze a grafting reaction of diene liquid rubber and maleicanhydride, the reaction temperature in the reaction process can be effectively reduced, the probability of gelation in the grafting reaction process is extremely low, the catalytic grafting efficiencyis higher, and the grafting rate of the grafted product reaches 15-20%.

Description

technical field [0001] The invention relates to the technical field of synthesis and application of transition metal complexes, in particular to a phosphoric acid-pyrimidine zinc dichloride complex with catalytic performance and its preparation method and application. Background technique [0002] Pyrimidine-phosphate compounds contain not only the nitrogen atom of pyrimidine, but also the phosphorus and oxygen atoms of phosphoric acid group, so they can easily form metal complexes with special three-dimensional structures with transition metal ions. Moreover, the nitrogen atom of pyrimidine and the oxygen atom of phosphoric acid can be used as good recognition groups for hydrogen bonds, which is conducive to the activation of some active compounds (such as phenols, acid anhydrides, amines, etc.) These compounds undergo important chemical reactions such as addition, substitution, and polymerization. [0003] Liquid rubber is a new low-molecular-weight liquid material with a...

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Problems solved by technology

[0004] "Research on Maleic Anhydride Grafted Liquid Polybutadiene" (Anhui Chemical Industry, 1998,93 (3): 32-34), "Measuring Method of Maleic Anhydride Grafted Liquid Isoprene Rubber Grafting Rate" (high function Acta Molecule Sinica, 2015, 28 (4): 398-402) discloses that liquid polybutadiene, liquid polyisoprene and maleic anhydride are grafted, and this reaction generally adopts thermal initiation and initiator to initiate free radicals to carry out Grafting reaction, that is, grafting reaction needs to occur under the conditions of high temperature 180-220 ℃ and BPO and other initiators. The grafting rate of this method can reach more than 7%. On the one hand, the higher the reaction temperature is, the higher the grafting rate is, but The higher the temperature, the more likely to be glued between the raw materials during the reaction process, so generally more anti-gelling agents need to be added during the reaction process. If the temperature of the grafting reaction is lowered, a large amount of monomers will remain and the grafting rate will be lower. Low, the addition of anti-gelling agent will bring additional production cost to the product, and it will also bring great trouble to remove the anti-gelling agent in the later separation and purification

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