The synthesis, characterization and some properties of new quasi-aromatic main group ring systems

摘要: Abstract The synthesis and characterization of several previously unknown ring systems that involve heavier main grop elements are described. Four new types potentially delocalized six-membered compounds comprise the cyclic arrays (RBPR′)3, (RAINR′)3, (RZnSR′)3 (GenR)3, considered. synthetic routes to these rings straightforward require only one or two steps give respective products in good yield. All have been structurally characterized. structures, conjunction with spectroscopic data, indicate considerable variation type. Quasi-aromaticity case (RBPR′)3 is well supported by experimental data and, indirectly, non-planar structure was observed for `anti-aromatic' four-membered (RBPR′)2 rings. Further support comes from recent calculations at SCF level using basis set 6-31G* which (HBHP)3 system has a similar stabilization seen borazine, whereas (HAINH)3 exhibits minor degree delocalization π electrons.