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Thiourea-formaldehyde condensate: Synthesis, characterization and electrical resistivity

✍ Scribed by Hari Singh Nalwa; Padma Vasudevan

Book ID
113186500
Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
245 KB
Volume
18
Category
Article
ISSN
0025-5408

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Dibenzo-18-crown-6 and formaldehyde polycondensate (PDBCO, M w = 6760, was synthesized by condensation in NMP using formic acid as catalyst. Alternatively, a sequence of reaction steps, involving sodium bromide salts, for solubilization (see Scheme 1) was worked up. PDBC as its sodium bromide comple