𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Alternating Copolymerization of Carbon Dioxide and Propylene Oxide Catalyzed by Cobalt Schiff Base Complex

✍ Scribed by Yongsheng Niu; Hongchun Li; Xuesi Chen; Wanxi Zhang; Xiuli Zhuang; Xiabin Jing

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
302 KB
Volume
210
Category
Article
ISSN
1022-1352

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Cobalt 2,4‐dinitrophenolate (complex 1) based upon a N,N,O,O‐tetradentate Schiff base ligand framework was prepared. X‐ray diffraction analysis confirmed that complex 1 was triclinic species with a six‐coordinated central cobalt octahedron in the solid. Asymmetric alternating copolymerization of carbon dioxide (CO~2~) with racemic propylene oxide (rac‐PO) proceeded effectively by complex 1 in conjunction with (4‐dimethylamino)pyridine (DMAP), yielding a perfectly alternating and bimodal molecular weight distribution PO/CO~2~ poly(propylene carbonate) (PPC) with a small amount of cyclic carbonate byproducts.

magnified image

📜 SIMILAR VOLUMES

Synthesis and Electrochemistry of Schiff
Synthesis and Electrochemistry of Schiff Base Cobalt(III) Complexes and Their Catalytic Activity for Copolymerization of Epoxide and Carbon Dioxide
✍ Xiuli Zhuang; Kenichi Oyaizu; Yongsheng Niu; Kenichiroh Koshika; Xuesi Chen; Hir 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 306 KB

## Abstract A series of cobalt complexes with __N__,__N__,__O__,__O__‐tetradentate Schiff base ligands were prepared. All the complexes were characterized by spectroscopy and electrochemical methods. An X‐ray crystal structure analysis revealed that L^1^**‐Co**^**III**^**‐dnp** was monomeric with a