A study of di(amino)stibines with terminal Sb(iii) hydrogen-ligands by X-ray- and neutron-diffraction

Abstract

The bis(amidodimethyl)disiloxane ligands [O{SiMe₂NR}₂]²⁻ (R = 2,6-Me₂C₆H₃ (Ar′) and 2,6-iPr₂C₆H₃ (Ar), abbreviated [NON^R]²⁻, are a stable support for Sb(III) complexes of general formula Sb(NON^R)X (X = Cl, H). The compounds are monomeric in the solid-state, with bidentate N,N′-coordination of the [NON^R]²⁻ and terminal chloride/hydrogen-ligands. Sb(NON^Ar′)H was analyzed by single-crystal neutron diffraction, giving the first accurate parameters for the Sb–H bond to an antimony(III) centre.