Study of half sandwich platinum group metal complexes containing tetradentate N-donor ligand bearing two di-pyridylamine units linked by an aromatic spacer

Abstract

Arene ruthenium compounds Cp*rhodium complexes 1,2-Bis(di-2-pyridylaminomethyl)benzene ligand a b s t r a c t A general approach for the preparation of dinuclear h 5 -and h 6

Spectral and Structural Studies of Platinum Group Metal Complexes of3‐(Di‐2‐Pyridylaminomethyl)Benzamide and Formation of Mutual Intermolecular Hydrogen Bonding in Some Complexes

“…The metal to pentamethylcyclopentadienyl ring centroid separation is 1.783 Å, whereas the bite angle around N(31)–Ir(1)–N(21) is 81.6(2)°. These values are consistent with the reported values 14…”

“…The “piano‐stool” arrangement about ruthenium atom is further reflected by small bite angle of di‐2‐pyridylamine moiety N(31)–Ru(1)–N(21) is 84.86(12)°. The metal to arene ring centroid distance is 1.680 Å, which is consistent with the reported value 9,14…”

“…The ruthenium cation adopts the expected and usual pseudo‐octahedral half sandwich “piano‐stool” arrangement around the Ru(1) atom with the p ‐cymene ligand occupying one face of the octahedron and the coordination of the bidentate di‐2‐pyridylamine moiety and the chloride ion on the other. The Ru(1)–N(31), Ru(1)–N(21) and Ru(1)–Cl bond lengths being 2.107(6), 2.118(7), and 2.418(2) Å, respectively, are within the range of reported arene ruthenium complexes with di‐2‐pyridylamine 9,14. The “piano‐stool” arrangement about ruthenium atom is further reflected by small bite angle of di‐2‐pyridylamine moiety N(31)–Ru(1)–N(21) is 84.86(12)°.…”

“…Complexes of Cu II ,10 as well as Pd II and Pt II 11,12 with polydipyridylamines were investigated for use in biological applications. Earlier, monomeric complexes bearing di‐2‐pyridylamine and dimeric complexes with 1, 2‐bis(di‐2‐pyridylamino methyl)benzene were reported in our laboratory 13,14. However, complexes containing a di‐2‐pyridylamine unit with an amide group at the meta ‐position have not yet been reported.…”

Synthesis, Spectroscopic and Molecular Studies of Half‐Sandwich η6‐Arene Ruthenium, Cp* Rhodium and Cp* Iridium Metal Complexes with Bidentate Ligands

“…Complex 5 form dimers via CH/Cl and weak CH/Cl and CH/O intermolecular interactions with bond lengths 2.855, 2.866, and 2.511 Å by adopting dimeric units of R 2 2 (8), R 2 2 (14), R 2 3 (6) respectively which are stabilized by crystal packing (Figure 8). Additionally, there is an interaction of the pyridyl rings (C12/C13/C14/C15) in the molecule by π ··· π interactions with the neighboring pyridyl molecule (C12/C13/C14/C15) with a bond length of 3.307 Å 38…”