A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 7531-52-4, Name is H-Pro-NH2, molecular formula is C5H10N2O. In an article, author is Liu, Shuai,once mentioned of 7531-52-4, SDS of cas: 7531-52-4.
The homoleptic bis(beta-quinolylenolate) zinc catalysts for the ring-opening polymerization of epsilon-caprolactone: Kinetics and mechanism
A series of bis(beta-quinolylenolate) zinc complexes (L2Zn) 1-5 (L = [(2-C9H6N)-CH= C(R)-O-], R = tBu (1), Ph (2), o-tolyl (3), p-tolyl (4), p-OMePh (5)), have been structurally characterized and used as initiators in the ring-opening polymerization (ROP) of epsilon-caprolactone (epsilon-CL). The molecular structures of 3 and 4 were defined by X-ray diffriaction analyses, showing a distorted-tetrahedral geometry around the zinc center. All complexes are stable in air and high temperature, and they efficiently catalyzed the ROP of epsilon-CL with high conversions in a controlled manner. Kinetic studies showed that polymerization reaction catalyzed by 1-5 proceeded with first-order dependence on the monomer and their catalytic activity is correlated with the substituents on the Ar moieties of the ligand. Complex 3 displayed the higher activity than others, might be due to its stronger electron-donating nature of the ortho-Me group on the aryl ring (Ar) of the enamino framework than that of orther sites, however, complex 2 without substituent on the Ar group exhibited poor activity in the polymerization reaction. The resultant PCL was a mixture of linear BnO- and MeO-capped structures. (c) 2020 Elsevier B.V. All rights reserved.
Interested yet? Keep reading other articles of 7531-52-4, you can contact me at any time and look forward to more communication. SDS of cas: 7531-52-4.
Reference:
Metal catalyst and ligand design,
,Ligand Template Strategies for Catalyst Encapsulation – NCBI