High activity of rare earth tetrahydroborates for ring-opening polymerization of ω-pentadecalactone
✍ Scribed by Yuushou Nakayama; Naoki Watanabe; Keisuke Kusaba; Kenta Sasaki; Zhengguo Cai; Takeshi Shiono; Chikara Tsutsumi
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 193 KB
- Volume
- 121
- Category
- Article
- ISSN
- 0021-8995
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The polymerization of caprolactone ( 1-CL) was initiated by yttrium triisopropoxide {Y(OP i r ) 3 }, bimetallic isopropoxide of yttrium and aluminum {Y[Al(OP i s ) 4 ] 3 }, yttrium and tin(II) {Y[Sn(OP i r ) 3 ] 3 }, and tin(II) and yttrium {Sn[Y(OP i r ) 4 ] 2 }, respectively. The polymerization wa
Phosphoraneiminato complexes of transition metals containing the NPR 3 À group are known in many coordinationchemical variations [1] as a result of varying bonding modes. In complexes with metal ions in low oxidation states (i, ii) the NPR 3 À group acts as m 3 -N bridging ligand, in medium oxidati