694440-65-8Relevant academic research and scientific papers
Comparative study of lactide polymerization by zinc alkoxide complexes with a β-diketiminato ligand bearing different substituents
Chen, Hsuan-Ying,Peng, Ya-Liu,Huang, Tai-Hsiung,Sutar, Alekha Kumar,Miller, Stephen A.,Lin, Chu-Chieh
, p. 61 - 71 (2011/06/17)
A series of β-diketiminate zinc complexes has been synthesized and their reactivity for the ring-opening polymerization (ROP) of lactide has been studied. The reaction of β-diketimines (LH) with diethyl zinc forms the monomeric [LZnEt] complexes which further react with benzyl alcohol (BnOH) in toluene/hexane yielding dinuclear or trinuclear zinc complexes. These complexes have been characterized by single crystal X-ray diffraction, which showed the tri- and tetra-coordinated zinc complexes in which zinc atoms exhibit trigonal and tetrahedral geometry, respectively. All complexes have been tested as initiators for the ring-opening polymerization of lactide; they are all highly active. The rate of polymerization is heavily dependent on the N-aryl substituents with the order: alkyl group ～ alkoxy > halide group > nitro group. The β-diketiminate zinc complexes allow controlled ring-opening polymerization as shown by the linear relationship between the percentage conversion and the number-average molecular weight. On the basis of literature reports, a mechanism for ROP of lactide has been proposed.
Magnesium and zinc complexes of a potentially tridentate beta-diketiminate ligand.
Dove, Andrew P,Gibson, Vernon C,Marshall, Edward L,White, Andrew J P,Williams, David J
, p. 570 - 578 (2007/10/03)
The synthesis of the unsymmetrically substituted beta-diketimine, 2-(2-methoxyphenylimino)-4-(2,6-diisopropylphenylamido)pent-2-ene, (BDI-2)H, is described and its complexation chemistry with magnesium and zinc is explored. Emphasis is placed on the prepa
