Synthesis and Coordination Chemistry of a Chelating P–Sn Ligand Based on Stanna‐closo‐dodecaborate

Abstract

Substitution at a B-H unit of the heteroborate cluster stanna-closo-dodecaborate [SnB 11 H 11 ] 2-at the upper belt of the icosahedron by one of the triarylphosphine moieties of xantphos was carried out under the catalysis of palladium acetate. The resulting coupling product is a monoanion offering two coordination sites: a low-valent tin-cluster vertex and a triaryl

Synthesis and Some Coordination Chemistry of Phosphane-Difunctionalized Bis(amidinato)-Heavier Tetrylenes: A Previously Unknown Class of PEP Tetrylenes (E = Ge and Sn)

“…Heavier tetrylenes (HTs), which are the heavier analogues of carbenes (silylenes, germylenes, stannylenes, and plumbylenes), have been used as ligands in transition-metal chemistry , since the 1970s . However, their incorporation into bi- or tridentate ligands is much more recent. – Within the broad family of bi- and tridentate HT ligands, those containing at least one amidinato-HT (in which the E atom is chelated by the N atoms of the amidinate group) have recently stood out since some of their complexes have shown remarkable catalytic activities. – Most of these species have been prepared by replacing the Cl atom of amidinato-HTs of the type ECl­(RNC­(R′)­NR) (E = heavier tetrel atom) with the appropriate functionalized fragment. This is the case for the recently reported HTs A , B , C , and D (Figure ), which are the only currently known amidinato-HTs comprising a phosphane fragment dangling from the E atom.…”