Effect of tris(bathophenanthroline)iron(III) on the polymerization of styrene

✍ Scribed by Aradhana Goswami; Shashi D. Baruah; Narendra N. Dass

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 485 KB
• Volume: 62
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19961219)62:12<2155::aid-app18>3.0.co;2-4

✦ Synopsis

The polymerization of styrene at 60°C initiated by 2,2'-azobisisobutyronitrile (AIBN) was studied in N,N-dimethylformamide (DMF) in the presence of tris-(bathophenanthroline)iron(III) complex, [Fe(bathophed3I3+. The complex was prepared in situ by mixing hexakis(N,N-dimethylformamide)iron(III) perchlorate with bathophenanthroline (systematic IUPAC nomenclature: 4,7-diphenyI-l,lO-phenanthroline) in the molar ratio of 1 : 3. The equilibrium constant for [Fe(DMF)6]3' + 3bathophen + [Fe(bath~phen)~]~+ + 6DMF was 3.12 X lo3 L3 m ~l -~.

The transfer constant for bathophenanthroline was found to be 0.38 & 0.01 for the styrene/DMF system at 60°C. Mean velocity constant at 60°C for interaction of polystyryl radical with [Fe(bathophen)J3+ was 3.73 X lo4 L mol-' s-'. 0 1996 John Wiley & Sons, Inc.