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Indian Journal of Chemistry -Section B (IJC-B) >
IJC-B Vol.44B [2005] >
IJC-B Vol.44B(01) [January 2005] >
| Title: | Synthesis and structural study of 3-anisyl-4-(4'-pyridyl(pyridinium)thieno[2,3-b]thienophenes |
| Authors: | Mashraqui, Sabir H
Hariharasubrahmanian, Harini
Ashraf, Mohamed
Sangvikar, Yogesh |
| Issue Date: | Jan-2005 |
| Publisher: | CSIR |
| IPC Code: | Int.Cl.7 C 07 D 333/00 |
| Abstract: | A new class of co-facially oriented
donor-acceptor thienothiophene 2 and its ionic analog 3 have been
synthesized to investigate the presence of through-space vs through-bond charge
transfer interaction. The key step is the double Dieckman cyclization on the
ketene dithioacetal 5. Comparative 1HÂ NMR
spectral analysis of 2 and 3 suggests through-bond charge transfer
between the  -deficient pyridinium ring and -rich thienophene ring being the dominant interaction with the
through-space charge transfer interaction in 3 making a relatively small contribution. The interpretation of
UV-Visible data 2 and 3 also seem to support such a
conclusion. |
| Page(s): | 115-120 |
| ISSN: | 0975-0983(Online); 0376-4699(Print) |
| Source: | IJC-B Vol.44B(01) [January 2005]
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