Tetrathieno[2,3-b]porphyrazines: Thiophene analogues of phthalocyanines: A re-investigation

The chemistry leading to the formation of tetrathieno[2,3-b]porphyrazines, which may be considered as thiophene analogues of phthalocyanines, previously reported in Linstead's early work on the phthalocyanines and related compounds, has been re-examined and some of the synthetic difficulties explored. The electronic spectral data for four metal complexes of the parent system and the correlation of the data with the results of PPP MO calculations are reported. (C) 1997 Published by Elsevier Science Ltd.