Please use this identifier to cite or link to this item: http://localhost:80/xmlui/handle/123456789/19969
Title: Synthesis of Three New Donor- Acceptor [4] Dendralenes
Authors: MIR MUNSIF ALI TALPUR
TAJNEES PIRZADA
PETER SKABARA
THOMAS WESTGATE
MOHAMMAD RAZA SHAH
Keywords: dendralene
Wittig reaction
cross- conjugation
UV-Vis
Knoevehagel condensation
Issue Date: 6-Aug-2013
Publisher: HEJ Research Institute of Chemistry, University of Karachi, Karachi.
Citation: Talpur, M. M., Pirzada, T., & Skabara, P. (2013). Synthesis of three new donor-acceptor (4) dendralenes. Journal of the Chemical Society of Pakistan, 35(4), 1219-1227.
Abstract: Three new donor - acceptor [4] dendralene compounds have been synthesized. Wittig reaction was used for the preparation of first two compounds and third one by Knoevehagel condensation. Their mass was calculated by APCI mass spectra which are in good agreement with theoretical data. UV-Vis data indicate the cross- conjugation in these systems due to the push-pull intra molecular charge transfer (CIT) sequence from electron donor to acceptor group. The ¹H-NMR signals appear in aromatic region confirming the formation of trans (having π- structures) isomers rather than cis may be due to the exposure of the compounds to ambient light. The dominating roll of electron acceptor nitro, methoxy and cyno benzene groups in conjugation is clearly shown. The ¹³C-NMR spectra which also supported the above analytical data and the number of carbons atoms obtained representing well the structures established.
URI: http://142.54.178.187:9060/xmlui/handle/123456789/19969
ISSN: 0253-5106
Appears in Collections:Issue 04



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