Neutral organoantimony(III) and organobismuth(III) ligands as acceptors in transition metal complexes – Role of substituents and co-ligands

Activation of an Au−Cl Bond by a Pendent SbIII Lewis Acid: Impact on Structure and Catalytic Activity

“…To our surprise, compound 1 showed some activity, with 18 % conversion over 33 hours. Although triarylstibines have been shown to be mildly acidic, to our knowledge no halide adducts of such species have been reported. Instead of facilitating chloride abstraction from the proximal gold center, the weakly Lewis acidic pendent stibine may serve instead to activate the gold center via inductive effects .…”

Chemistry and Some Biological Potential of Bismuth and Antimony Dithiocarbamate Complexes

“…The trihalide derivatives of the pnictogen group are found to behave as weak acceptors toward other ligands, and these Lewis acidic properties increase down the group for a given halide [10]. element and the least abundant of the pnictogens or Group 15 elements; is monoisotopic in nature and is often considered the heaviest stable element with a half-life of 1.9 × 109 years [20].…”

“…The organometallic derivatives of Sb and Bi are often referred to as stibines and bismuthines, respectively, and they have been widely studied for arsine and phosphine ligands. Stibines (SbR 3 ) and bismuthines (BiR 3 ) are the heavier analogues of these ligands, and they confer more interesting features that are often less shown in simpler analogues [10].Generally, organometallic complexes show unique physio-chemical properties and have been extensively used in catalysis and as drug candidates [12]. In recent times, due to the useful characteristics of these group of compounds such as structural diversity, possibilities for ligand exchange, redox and catalytic properties, they have been used for diverse medicinal purposes [12][13][14].…”

“…The organometallic derivatives of Sb and Bi are often referred to as stibines and bismuthines, respectively, and they have been widely studied for arsine and phosphine ligands. Stibines (SbR 3 ) and bismuthines (BiR 3 ) are the heavier analogues of these ligands, and they confer more interesting features that are often less shown in simpler analogues [10].…”

A Five-Membered PdSbn Coordination Series

“…We have an interest in Lewis amphoteric main group ligands, which behave as electron donors towards M, (EM) while also retaining some Lewis acidic character at E. This behavior is most often observed in complexes of organoantimony ligands, in which Sb(III) centres coordinate to a transition metal via a lone pair while also forming secondary coordinative bonds with available nearby donor atoms (N, O, halides) ( Figure 1a). [6][7][8][9] Sb-M (M = late transition metal) complexes can demonstrate unforeseen reactivity arising from the non-innocence of antimony ligands with respect to redox or coordination, as demonstrated by Gabbaï's extensive work on tethered Sb-M systems, leading to potential applications in catalysis, solar energy storage and anion sensing. 3,[10][11][12][13][14][15][16] In particular, the strong affinity of Sb for halide anions (X -) means that the formation of Sb-X bonds is often favoured over the formation of M-X bonds.…”