... Polyhedron. Volume 40, Issue 1, 19 June 2012, Pages 168–174. ... Eq. (1) shows synthesis of 1,2-{bis(2-pyridylethynyl)benzene} derivatives, 2f–2h, having substituents on the pyridyl groups from Sonogashira reaction of 1,2-dialkynylbenzene with 2-bromopyridines, 6f–6h. ...