Metal-containing liquid crystals: calamitic metallomesogens containing two dicarbonyl-rhodium or -iridium moieties bound to a single salen-type ligand
Abstract
Mesomorphic Schiff base (salen type) ligands H2La–H2Lc[H2Lx={C10H21C6H3(O)CHN}2Rx; Ra= CH2CH2, Rb= 1,4-C6H4, Rc= 1,4-C6H10 complex two square planar cis-M(CO)2 moieties (M = Rh, Ir); the complexes [{M(CO)2}2Lc] show smectic A behaviour.