The trans‐Influence in Platinum (II) Complexes. ¹H‐ and ¹³C‐NMR. and X‐ray structural studies of tridentate Schiff's base complexes of platinum (II)

Abstract

1H‐ and 13C‐NMR. data are reported for the complexes [Pt(1)L] and [Pt(2)L]; 1 = OC6H4CH  NCH2CH2O, 2 = OC6H4CH  NC6H4O; L = PR3, AsR3, C  N (cyclohexyl), DMSO, pyridine, secondary amine. The molecular structures of [Pt (2) (NHEt2)] (I) and [Pt (2) (PPh3)] (II) have been determined by X‐ray analysis. Relevant bond distances for I: Pt‐N (amine) = 2.076 Å, Pt‐N (imine) = 2.017 Å, Pt‐O = 1.992 Å and 2.002 Å; for II: Pt‐P = 2.248 Å, Pt‐N = 2.064 Å, Pt‐O = 1.964 and 2.005 Å. Both the solid and solution state data are interpreted in terms of differences in the trans influence of the ligand L. The question of metal‐ligand d‐p π back bonding to the imine is discussed.

Rh NMR studies of organometallic rhodium(I) derivatives

“…To obtain resolved 13C specrra it was necessary to lower the temperature to 223K and, in some cases, the exchange process was not completely stopped (26,28,29). Compound 24 gave a very broad signal.…”

“…The compounds [Rh.X.cod.pyridines] (23-29) exhibit some specific problems because of an exchange between the X ligands and pyridines at 294K. To obtain resolved 13C specrra it was necessary to lower the temperature to 223K and, in some cases, the exchange process was not completely stopped (26,28,29). Compound 24 gave a very broad signal.…”

Supramolecular Recognition: Protonmotive‐Driven Switches or Motors?

“…The platinum compound 9 is prepared by a variation of the Pregosin method. [15] Replacement of the dimethyl sulfoxide (DMSO) ligand from 9 by ammonia gives the ammine complex 4 efficiently.…”

Reactions of Schiff Base‐Substituted Diselenides and ‐tellurides with Ni(II), Pd(II) and Pt(II) Phosphine Complexes

“…Until today, tri-and tetradentate Schiff bases are common ligands for nickel, palladium and platinum, as they yield stable, flexible and easily tunable complexes due to the modularity of the Schiff base preparation. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] Hundreds of such compounds have been characterized crystallographically. [16] The introduction of additional chalcogen donor atoms in the form of arylchalcogenolato units is a common motif to modulate the properties of the resulting complexes.…”