Tuned Helical Array of Rh^III/Ir^III Cp* Complexes with Polypyridyl Ligands

Abstract

Reactions of the chloro‐bridged dimeric complexes [{(η5‐C5Me5)M(μ‐Cl)Cl}2] (M = Rh, Ir) with the polypyridyl ligands 2,3‐di(2‐pyridyl)pyrazine (dpp) and 2,4,6‐tri(2‐pyridyl)‐1,3,5‐triazine (tptz) in the presence of ammonium tetrafluoroborate gave the mononuclear complexes [(η5‐C5Me5)MCl(κ2‐dpp)]BF4 [M = Rh (1), Ir (2)] and [(η5‐C5Me5)MCl(κ2‐tptz)]BF4 [M = Rh (3), Ir (4)]. The complexes have been characterised by elemental analysis, FAB‐MS, ESMS, IR, NMR, electronic and emission spectroscopic studies and the molecular structures of 1, 2 and 3 have been crystallographically determined. Structural studies on the complexes revealed the presence of helical superstructures resulting from C–H···X (X = N, F, Cl and π) interactions. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)

Multimetallic compounds containing cyclometalated Ir(III) units: Synthesis, structure, electrochemistry and photophysical properties

“…In the triazine ring, the C57-N6 and C57-N9 distances (1.477(10) and 1.478(10) Å, respectively) are typical of a C-N single bond. The remaining four C-N distances are in the range 1.314-1.355 Å and are comparable to the mean C-N distances reported for other tptz complexes [39,40]. In spite of the tetrahedral carbon, C57, the triazine ring is planar with the mean deviation being less than 0.01 Å.…”

Half-sandwich iridium complexes—Synthesis and applications in catalysis

“…Thus, treatment of [Cp*IrCl 2 ] 2 with 2,3-di(2-pyridyl)pyrazine (dpp) or 2,4,6-tri(2-pyridyl)-1,3,5-triazine (tptz) afforded the complexes 13 and 14 (Table 2, entries 3 and 4) [20]. Due to the presence of uncoordinated donor sites, these complexes can be easily functionalized and potentially used as building blocks for supramolecular assembly through C-H· · ·X [21].…”

“…Another group of important iridium complexes of the same category is half-sandwich iridium complexes containing monotosylated diamine ligands. These complexes were prepared in racemic form from achiral tosyl diamines (16)(17)(18)(19)(20) (Scheme 4) [4]. The closely related chiral variants will be addressed in Section 3.3.2.…”

Spectroscopic and electrochemical study for evaluating DNA interaction activity of 4‐(3‐halophenyl)‐6‐(pyridin‐2‐yl)pyrimidin‐2‐amine based piano stool Cp* Rh (III) and Ir (III) complexes

“…The dinuclear dichloro dimer was synthesized using the above procedure using the RhCl 3 /IrCl 3 and pentamethylcyclopentadiene (Scheme ) according to the reported method . [{(η 5 ‐C 5 Me 5 )Rh(μ‐Cl)Cl} 2 ]: 70%.…”