Abstract
A series of dimeric magnesium derivatives containing substituted pyrrolyl or ketiminato ligands was synthesised and the application of these derivatives for the ring opening polymerisation of ε-caprolactone has been carried out. Reactions of [Mg{N(SiMe3)2}]2 (1) with one equiv. of 2-dimethylaminomethyl pyrrole and 2-diethylaminomethyl pyrrole in toluene generates [Mg{C4H3N(2-CH2NMe 2)}{N(SiMe3)2}]2 (2) and [Mg{C 4H3N(2-CH2NEt2)}{N(SiMe 3)2}]2 (3), respectively, in high yield. Similarly, the reaction of 1 with one equiv. of 2-tert-butylaminomethyl pyrrole in toluene at room temperature affords [Mg{C4H3N(2-CH 2NHtBu)}{N(SiMe3)2}]2 (4). Furthermore, reactions of 1 with one equiv. of HOCMeCHCMeN(C6H 3-2,6-iPr2) or HOCMeCHCMeN(C6H 4-2-OMe) in toluene yielded the dimeric magnesium complexes, [Mg{OCMeCHCMeN(C6H3-2,6-iPr2)}{N(SiMe 3)2}]2 (5) and [Mg{OCMeCHCMeN(C 6H4-2-OMe)}{N(SiMe3)2}]2 (6), respectively, in satisfactory yields by means of deamination. All the complexes were characterised by NMR spectroscopy and X-ray diffraction analysis in the solid state. They show moderate reactivity towards the ring opening polymerisation of ε-caprolactone in dichloromethane or tetrahydrofuran. A series of dimeric magnesium derivatives containing substituted pyrrolyl or ketiminato ligands was synthesised and the compounds were evaluated as catalytic precursors. The complexes show moderate reactivity towards the ring opening polymerisation of ε-caprolactone in dichloromethane or tetrahydrofuran.
| Original language | English |
|---|---|
| Pages (from-to) | 5530-5537 |
| Number of pages | 8 |
| Journal | European Journal of Inorganic Chemistry |
| Issue number | 36 |
| DOIs | |
| Publication status | Published - 2011 Dec 1 |
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All Science Journal Classification (ASJC) codes
- Inorganic Chemistry
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Magnesium complexes containing η1- and η3- pyrrolyl or ketiminato ligands : Synthesis, structural investigation and ε-caprolactone ring-opening polymerisation. / Hsueh, Li Feng; Chuang, Nien Tsu; Lee, Cheng Yuan; Datta, Amitabha; Huang, Jui Hsien; Lee, Ting Yu.
In: European Journal of Inorganic Chemistry, No. 36, 01.12.2011, p. 5530-5537.Research output: Contribution to journal › Article
TY - JOUR
T1 - Magnesium complexes containing η1- and η3- pyrrolyl or ketiminato ligands
T2 - Synthesis, structural investigation and ε-caprolactone ring-opening polymerisation
AU - Hsueh, Li Feng
AU - Chuang, Nien Tsu
AU - Lee, Cheng Yuan
AU - Datta, Amitabha
AU - Huang, Jui Hsien
AU - Lee, Ting Yu
PY - 2011/12/1
Y1 - 2011/12/1
N2 - A series of dimeric magnesium derivatives containing substituted pyrrolyl or ketiminato ligands was synthesised and the application of these derivatives for the ring opening polymerisation of ε-caprolactone has been carried out. Reactions of [Mg{N(SiMe3)2}]2 (1) with one equiv. of 2-dimethylaminomethyl pyrrole and 2-diethylaminomethyl pyrrole in toluene generates [Mg{C4H3N(2-CH2NMe 2)}{N(SiMe3)2}]2 (2) and [Mg{C 4H3N(2-CH2NEt2)}{N(SiMe 3)2}]2 (3), respectively, in high yield. Similarly, the reaction of 1 with one equiv. of 2-tert-butylaminomethyl pyrrole in toluene at room temperature affords [Mg{C4H3N(2-CH 2NHtBu)}{N(SiMe3)2}]2 (4). Furthermore, reactions of 1 with one equiv. of HOCMeCHCMeN(C6H 3-2,6-iPr2) or HOCMeCHCMeN(C6H 4-2-OMe) in toluene yielded the dimeric magnesium complexes, [Mg{OCMeCHCMeN(C6H3-2,6-iPr2)}{N(SiMe 3)2}]2 (5) and [Mg{OCMeCHCMeN(C 6H4-2-OMe)}{N(SiMe3)2}]2 (6), respectively, in satisfactory yields by means of deamination. All the complexes were characterised by NMR spectroscopy and X-ray diffraction analysis in the solid state. They show moderate reactivity towards the ring opening polymerisation of ε-caprolactone in dichloromethane or tetrahydrofuran. A series of dimeric magnesium derivatives containing substituted pyrrolyl or ketiminato ligands was synthesised and the compounds were evaluated as catalytic precursors. The complexes show moderate reactivity towards the ring opening polymerisation of ε-caprolactone in dichloromethane or tetrahydrofuran.
AB - A series of dimeric magnesium derivatives containing substituted pyrrolyl or ketiminato ligands was synthesised and the application of these derivatives for the ring opening polymerisation of ε-caprolactone has been carried out. Reactions of [Mg{N(SiMe3)2}]2 (1) with one equiv. of 2-dimethylaminomethyl pyrrole and 2-diethylaminomethyl pyrrole in toluene generates [Mg{C4H3N(2-CH2NMe 2)}{N(SiMe3)2}]2 (2) and [Mg{C 4H3N(2-CH2NEt2)}{N(SiMe 3)2}]2 (3), respectively, in high yield. Similarly, the reaction of 1 with one equiv. of 2-tert-butylaminomethyl pyrrole in toluene at room temperature affords [Mg{C4H3N(2-CH 2NHtBu)}{N(SiMe3)2}]2 (4). Furthermore, reactions of 1 with one equiv. of HOCMeCHCMeN(C6H 3-2,6-iPr2) or HOCMeCHCMeN(C6H 4-2-OMe) in toluene yielded the dimeric magnesium complexes, [Mg{OCMeCHCMeN(C6H3-2,6-iPr2)}{N(SiMe 3)2}]2 (5) and [Mg{OCMeCHCMeN(C 6H4-2-OMe)}{N(SiMe3)2}]2 (6), respectively, in satisfactory yields by means of deamination. All the complexes were characterised by NMR spectroscopy and X-ray diffraction analysis in the solid state. They show moderate reactivity towards the ring opening polymerisation of ε-caprolactone in dichloromethane or tetrahydrofuran. A series of dimeric magnesium derivatives containing substituted pyrrolyl or ketiminato ligands was synthesised and the compounds were evaluated as catalytic precursors. The complexes show moderate reactivity towards the ring opening polymerisation of ε-caprolactone in dichloromethane or tetrahydrofuran.
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U2 - 10.1002/ejic.201100827
DO - 10.1002/ejic.201100827
M3 - Article
AN - SCOPUS:83755178307
SP - 5530
EP - 5537
JO - Chemische Berichte
JF - Chemische Berichte
SN - 0009-2940
IS - 36
ER -