An N-heterocyclic carbene adduct of diatomic tin, :SnSn:

Abstract

Reduction of an N-heterocyclic carbene (NHC) adduct of SnCl(2), viz. [(IPr)SnCl(2)] (IPr = :C{N(Dip)C(H)}(2); Dip = 2,6-diisopropylphenyl), with a magnesium(I) dimer, has afforded the first NHC complex of a row 5 element in its diatomic form, [(IPr)Sn=Sn(IPr)]; a computational analysis of the complex indicates that it comprises a singlet state, doubly bonded tin(0) fragment, :Sn=Sn:, datively bonded by two NHC ligands.

Main group metal lone-pair⋯π(arene) interactions: a new bonding mode for supramolecular associations

“…Since the original review documenting the occurrence of Pb(lp)⋯π(arene) interactions, 7 another nine structures, 24-32, [41][42][43][44][45][46][47] have appeared in the crystallographic literature having these structure-directing contacts, Fig. 5 and Table 1.…”

Recent Advances in the Field of Main‐Group Mono‐ and Diatomic “Allotropes” Stabilised by Neutral Ligands

“…Jones and Frenking reported the synthesis of 3 Sn by reduction of the NHC-SnCl 2 adduct 21 using the Mg I reductant 6 (Scheme 5). [44] The synthesis is more challenging than for the Si and Ge analogues, and only a very small amount of product could be isolated from the reaction. The complex was observed to be unstable in the solid state at moderately elevated temperatures, and unstable in solution at room temperature.…”

A Coordination Compound of Ge0 Stabilized by a Diiminopyridine Ligand

“…[1][2][3] In particular, the unique zero oxidation state, E(0), has recently been realised. L (E = Si, [8] Ge, [9] Sn; [10] L = NHC carbene; 2 in Scheme 1) [11] and a wider class of socalled ylidones, L!E ! These compounds can be placed into two major categories: the double-bonded species L!E = E !…”