Posted on 1 January 1989 by kax_hpcDiastereoselective formation of chiral 2, 2′-spirobibenz[d]chromene derivatives. Evidence from circular dichroism and crystallographic data Diastereoselective formation of chiral 2, 2′-spirobibenz[d]chromene derivatives. Evidence from circular dichroism and crystallographic data Tetrahedron Jacek Gawronski, Krystyna Gawronska, Andrzej Katrusiak