Revised structures of N-substituted dibrominated pyrrole derivatives and their polymeric products. Termaleimide models with low optical band gaps

DS Choi, S Huang, M Huang, TS Barnard…

Index: Beddoes, Roy L.; Zhao, Yuekun; Joule, John A. Acta Crystallographica Section C: Crystal Structure Communications, 1996 , vol. 52, # 9 p. 2313 - 2315

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Citation Number: 63

Abstract

... 2,5-positions, the structure of 2d was determined by single-crystal X-ray ... However, the aforementioned crystallographic determinations were necessary to ensure the initial assignments of the ... figure. Ullmann polymerization of the dibromides 4a−c afforded, therefore, the poly(N ...