ISSN:
0021-8383
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Analytical Problems of the Reaction between Polymer Supported Phosphino Groups and Methyl IodideA series of different crosslinked styrene-divinylbenzene-copolymers bearing diphenyl phosphinomethyl groups was reacted with methyl iodide in ethanol. The quaternization has been controlled by elementary analysis of P and I and by ir spectroscopy using a key band at 1123/cm. The spectroscopic method gave satisfactory results with sample amounts of 5 mg polymer in KBr discs. In resins containing up to 7% divinylbenzene the methylation was almost quantitative within 1 h refluxing. However, in highly crosslinked polymers ( 〉 10% DVB) containing residues of free chloromethyl groups and intraresin quaternized phosphino groups we observed side reactions in boiling ethanol. These could be avoided by performing the methylation in toluene at room temperature.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/prac.19833250312
