Aromaticity in Polyacene Analogues of Inorganic Ring Compounds
  The aromaticity in the polyacene analogues of several inorganic ring compounds (BN-acenes, CN-acenes, BO-acenes and Na6-acenes) is reported here for the first time. Conceptual density functional theory based reactivity descriptors and the nucleus independent chemical shift (NICS) values are used in this analysis. 
Pratim Kumar Chattaraj and Debesh Ranjan Roy