Antimony diiminopyridine complexes

Abstract

The stoichiometric reactions of antimony trichloride, trimethylsilyl trifluoromethanesulfonate, and diiminopyridine ligands lead to the formation of N,N′,N″-chelated SbCl2 cationic complexes. Methyl, phenyl substituents on the imine carbons of the ligand...

Investigating the Reactions of BiCl3, a Diiminopyridine Ligand, and Trimethylsilyl Trifluoromethanesulfonate

“…Diiminopyridine (DIMPY) ligands offer a rigid pincer framework capable of stabilizing reactive metal centers competent in activating bonds that have been applied in the catalytic polymerization of olefins as well as promoting cycloaddition and borylation reactions . Almost all of the heavy group 13–16 elements have been reported, but for row 6, complexes exist only for Tl and Pb . The cationic lead complex ( C ) bears an isothiocyanate ligand with an unusual geometry at lead as the ligand retains planarity with the isothiocyanate perpendicular to the PbN 3 plane rationalized by the Pb­(II) center having a stereochemically active lone pair .…”

“…The cationic lead complex ( C ) bears an isothiocyanate ligand with an unusual geometry at lead as the ligand retains planarity with the isothiocyanate perpendicular to the PbN 3 plane rationalized by the Pb­(II) center having a stereochemically active lone pair . The thallium­(I) complex ( D ) could be crystallized as a dimer through Tl-arene interactions with the ligand of another molecule or could be co-crystallized with benzene or toluene to form Tl-η arene complexes, with the arene bridging two thallium centers . Thallium complex D has notably long Tl–N bonds that are classified as weak interactions and the ligand binds lead more tightly in C [Tl–N range = 2.739(2)–2.795(2) c.f.…”

The reactivity of antimony and bismuthN,C,N-pincer compounds toward K[BEt3H] – the formation of heterocyclic compoundsvs. element–element bondsvs.stable terminal Sb–H bonds

“…1F). 19 Based on these recent results, it is obvious that the pincer chemistry of heavy Group 15 elements constitutes an exciting and quickly developing area.…”

Coordination Chemistry of the Antimony(III) and Bismuth(III) Cations using Bis(α‐iminopyridine) as Ligand

“…[16] The tripodal tetradentate ligands such as tris(benzoimidazol)amine [17] or tris(2-pyridyl)phosphine and analogues [18] also efficiently coordinate to these positively charged pnictogen acceptors (B and C respectively). Very recently, Martin et al have reported the Sb(III) [19] and Bi(III) [20] cationic complexes introducing the redox-active diiminopyridine as ligand (D). The authors were capable of isolating both [BiCl 2 ] + and [BiCl] 2 + species, while reported only [SbCl 2 ] + in the case of antimony.…”

“…The authors were capable of isolating both [BiCl 2 ] + and [BiCl] 2 + species, while reported only [SbCl 2 ] + in the case of antimony. [19,20] The substitution on the α-carbon plays crucial role in terms of the product isolation, with the methyl substitution leading to complex mixture formations. [21] Generally, the Schiff base ligands are unpopular for the stabilization of heavier pnictogen cationic species due to their competing redox behavior impeding simple coordination abilities.…”