Syntheses, Structure, and Reactivity of Amino(azido)stibanes

Abstract

Amino(azido)stibanes Mes*N(SiMe 3 )Sb(N 3 )X (X = N 3 , Cl, OTf) were synthesized and fully characterized. Their structures were determined by single-crystal X-ray diffraction and are rare examples of antimony azides. On account of weak Sb···X van der Waals interactions, centrosymmetric dimers are observed in the solid state. Mes*N(SiMe 3 )Sb(OTf)X species (X = Cl, N 3 , and OTf; OTf = triflate = CF 3 SO 3 -) are labile

Establishing the Coordination Chemistry of Antimony(V) Cations: Systematic Assessment of Ph4Sb(OTf) and Ph3Sb(OTf)2 as Lewis Acceptors

“…[31] Study of crystals of 3 (space group P2 1 /n), attained by recrystallization from CH 2 Cl 2 /pentane at À30 8C, by X-ray diffraction revealed ap enta-coordinate trigonal-bipyramidal Sb center,a s for the As [32] and Bi [3] analogues, with two axially bound triflate substituents (O-Sb-O = 173.21(5)8), and three equatorial phenyl substituents in which the ipso carbon atoms are coplanar with the Sb center ( Figure 2). The two SbÀOb onds (average 2.172(2) ; S CR = 2.03 ), [24] are consistent in length with other examples of short SbÀOTf interactions, [33,34] and are representative of "fully coordinated" triflate substituents at Sb.…”

Diatomic PN – trapped in a cyclo-tetraphosphazene

“…In a next series of experiments we wanted to explore the ability of the triate-substituted aminophosphane (Me 3 Si) 2 NP(OTf) 2 (OTf ¼ CF 3 SO 3 À , triuoromethylsulfonate) to serve as a PN-precursor, as Me 3 Si-OTf is a common leaving group in main group chemistry. 44,45 In the absence of a trapping reagent the addition of two equivalents of AgOTf to a solution of 1 in CH 2 Cl 2 at À80 C yielded according to 31 P NMR spectroscopy no phosphorus-containing product. However, the evolution of Me 3 Si-OTf was observed.…”

Synthesis of a Molecule with Five Different Adjacent Pnictogens

“…Besides some halide substituted compounds like [X‐Sb( μ ‐NR)] 2 (X=halide; R=Mes*, t Bu), there are also some further functionalized ones like [R 1 Sb( μ ‐NR 2 )] 2 (R 1 = t Bu; R 2 =N 3 , OPh, O t Bu, OMe, t Bu, Me, PSiMe 3 . R 1 =NH t Bu, NHDipp, NHDmp; R 2 = t Bu (Dmp=2.6‐dimethyl‐phenyl)) . Diazadibismetidines like [Bi 2 (N t Bu) 4 Li 2 ], [PhBi( μ ‐N t Bu)] 2 or [DippNHBi( μ ‐NDipp)] 2 are known as well but only a little work has been done in this field up to now .…”