Coordination Behaviour of the New Multidentate Ligand 3,5-Bis(dimethylaminomethyl)pyridine with Palladium(II) and Platinum(II) Metal Centres

Abstract

The synthesis of the new potentially tridentate ligand 3,5‐bis(dimethylaminomethyl)pyridine (3) is described. Coordination chemistry of this ligand has been investigated with PdII and PtII precursor compounds. Both a bidentate bridging bonding motif and a monodentate bonding mode is observed. The latter compounds incorporate 3 by coordination through the pyridinic N atom only. The former complexes contain ligand 3 bonded to 2 metal centres by bridging through coordination of one trialkyl N donor atom and the pyridinic N atom. The solid‐state structure of a ligand bridged Pd dimer has been elucidated by single‐crystal X‐ray diffraction and corroborates with the solid‐state IR data that suggested a trans‐PdCl2 unit was present.

Synthesis and characterization of ruthenium ‘pincer’ complexes containing sulfur atom donor ligands. The X-ray crystal structure of [RuCl2(η3-NN′N)(SMe2)] (NN′N={2,6-(Me2NCH2)2C5H3N})

“…These data reflect the dynamic nature of these complexes, involving inversion at the coordinated sulfur atom, a process frequently observed for similar complexes [13]. To further confirm that this structural motif is retained in the solid state, a single crystal X-ray diffraction study of 2 was carried out 3 . This revealed that the general structure suggested in solution is also found in the solid state.…”

“…In a series of publications, we have reported a large number of transition metal (TM) and lanthanide complexes containing multidentate donor fragments that are commonly referred to as 'pincer' ligands [1]. These species include such organic molecules as 2,6-bis-[(dimethylamino)methyl]pyridine (NN%N) [2], 3,5-bis-[(dimethylamino)methyl]pyridine [3] and the aryl carbanions derived from 2,6-bis[(dimethylamino)methyl]benzene (NCN%) [1,4] or its phosphorous analogues (PCP: Fig. 1) [5].…”

Supramolecular dioxygen receptors composed of an anionic water-soluble porphinatoiron(ii) and cyclodextrin dimers

“…was described in a previous paper. 20 3,5-Bis(chloromethyl)pyridine, 26 3-(1H-imidazol-1-yl)pentane-1,5-diamine, 27 3-(1H-imidazol-1-yl)pentanedioic acid, 28 and mono 29 were synthesized according to the procedures reported in the literature. The synthetic procedures for Py3NHCD, Im3NHCD and Im2CD are shown below.…”

Titanium σ-acetylides as building blocks for heterobimetallic transition metal complexes: synthesis and redox behaviour of π-conjugated organometallic systems

“…Another strategy to obtain 'early-late' heterometallic compounds is the reaction of suitable late TM complexes with the N-ligating site of compounds 5 or 6. Therefore, these molecules were reacted with the cationic Pt complexes [ [35] as well as with the neutral dinitrogen bridged Ru complex 14 [36]. Here, the Ti acetylide could act as an h 1 -coordinated ligand after displacement of H 2 O, MeCN or N 2 , respectively (Scheme 1).…”

“…The starting materials {Ti}Cl (1) [11,20] (13) [35] and {Ru}N N{Ru} ( 14) [36] were prepared following published procedures. All other chemicals were purchased from commercial sources.…”