Heteroleptic mer-[Cr(N^∩N^∩N)(CN)₃] complexes: synthetic challenge, structural characterization and photophysical properties.

ABSTRACT: The substitution of three water molecules around trivalent chromium in CrBr₃·6H₂O with the tridentate 2,2':6',2''-terpyridine (tpy), N,N'-dimethyl-N,N'-di(pyridine-2-yl)pyridine-2,6-diamine (ddpd) or 2,6-di(quinolin-8-yl)pyridine (dqp) ligands gives the heteroleptic mer-[Cr(L)Br₃] complexes. Stepwise treatments with Ag(CF₃SO₃) and KCN under microwave irradiations provide mer-[Cr(L)(CN)₃] in moderate yields. According to their X-ray crystal structures, the associated six-coordinate meridional [CrN₃C₃] chromophores increasingly deviate from a pseudo-octahedral arrangement according to L = ddpd ≈ dpq ≪ tpy; a trend in line with the replacement of six-membered with

SUBMITTER: Chong J 

PROVIDER: S-EPMC8922558 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature