Steric Selection of Anion Binding Sites by Organoantimony(V) Pnictogen Bond Donors: An Experimental and Computational Study.

ABSTRACT: Catecholatostiboranes have emerged as useful Lewis acids in several applications. To better understand the factors that control the properties of these species, we examined the Lewis acidities of (o-C₆Cl₄O₂)Sb(o-Tol)₃ (2, Tol = tolyl) and (o-C₆Cl₄O₂)Sb(p-Tol)₃ (3), two triarylcatecholatostiboranes that differ by the nature of the aryl substituent. Fluoride anion binding studies indicate that 3 is more Lewis acidic than 2, a factor readily assigned to the steric crowding around antimony in the case of the o-tolyl derivative. But, while 3 binds F^- trans to a Sb-C_aryl bond as is typical of catecholatostiboranes,

SUBMITTER: Murphy BL 

PROVIDER: S-EPMC11653240 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature