Magnesium and zinc complexes of a potentially tridentate beta-diketiminate ligand

Dalton Transactions : an International Journal of Inorganic Chemistry
Andrew P DoveDavid J Williams

Abstract

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 preparation of alkoxide and amide derivatives for the ring-opening polymerisation of lactide; their behaviour as polymerisation initiators is compared to analogous compounds supported by the N,N'-bis(2,6-diisopropylphenyl) beta-diketiminate ligand, BDI-1. (BDI-2)H reacts with Me2Mg to give the bis(chelate) complex, (BDI-2)2Mg, 3. Magnesium alkyls supported by BDI-2 may be prepared by increasing the size of the alkyl group. Hence, lithiation of (BDI-2)H affords [(BDI-2)Li]2, 4; its subsequent treatment with iPrMgCl produces (BDI-2)MgiPr, 5. Aminolysis of complex using iPr2NH yields the amide complex, (BDI-2)MgNiPr2, 6. Zn(NTMS2)2 and ZnEt2 react with (BDI-2)H to give (BDI-2)Zn(NTMS2), 7, and (BDI-2)ZnEt, 8, respectively. The former is converted into the siloxide complex, (BDI-2)Zn(OSiPh3), 9, upon reaction with Ph3SiOH. The chloride derivative, (BDI-2)ZnCl, 10, has also been prepared via the reaction of ZnCl2 with 4. Crystallographic analysis of compounds, and reveals that the potent...Continue Reading

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Citations

Oct 6, 2005·Chemical Communications : Chem Comm·Janusz LewińskiIwona Justyniak
Sep 8, 2010·Chemical Communications : Chem Comm·Stephan SchulzRoland Boese
Feb 1, 2011·Chemical Communications : Chem Comm·Stephan SchulzChristoph Wölper
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Mar 24, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·D JędrzkiewiczS Szafert
Dec 24, 2004·Dalton Transactions : an International Journal of Inorganic Chemistry·Anthony G AventPeter B Hitchcock
Apr 30, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Kuo-Fu PengChi-Tien Chen
Mar 27, 2015·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Chi-Tien ChenTzu-Lun Huang
Jul 8, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·D JędrzkiewiczS Szafert
Dec 15, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·D JędrzkiewiczS Szafert
Sep 11, 2007·Dalton Transactions : an International Journal of Inorganic Chemistry·Chi-Tien ChenKuo-Fu Peng
Jun 19, 2008·Dalton Transactions : an International Journal of Inorganic Chemistry·Shaogang Gong, Haiyan Ma
Nov 26, 2008·Dalton Transactions : an International Journal of Inorganic Chemistry·Jolanta EjflerPiotr Sobota
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Aug 16, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Shaodi SongYang Yang
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