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Synthesis and characterization of a new chelating polymer and its metal complexes

✍ Scribed by Lamies Shahada; Ahmed El-Toukhy; A Tieh Abu-Raqabah

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
890 KB
Volume
115
Category
Article
ISSN
1381-1169

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✦ Synopsis

The monomer exo-7-isopropylidenebicyclo2,2,l]hept-2-ene-5,6-dicarboxylic-acidanhydride

(1) [J.H. Day, Chem. Revs., 53 (1953) 1671 undergoes smooth homopolymerization using the WCI,/(CH,),Sn or MoCI,/(CH,),Sn based ring opening metathesis polymerisation initiators to give a polymer (PI). Aiming to synthesize a chelating polymer, the monomer (I) was treated with the potential complexing agent S-methylhydrazinecarbodithioate to give monomer (II) which was subjected to metathesis polymerization using WCI, and MoCl, based catalysts. Unfortunately, the formation of complexes between (11) and these initiators completely inhibits ring opening polymerization. However, the synthesis of polymer containing chelating group (PII) was achieved by treating (PI) with NH2NHCSSCH, in DMF as solvent. The chelating polymer (PID reacts with metal(I1) acetates in a 2: 1 repeating unit: metal molar ratio giving neutral complexes of the general formula (PIII) which are insoluble in common organic solvents. The isolated polymers and their metal complexes were characterized by elemental analysis. IR, NMR, TG and DTA measurements.

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