Themed collection Tin: Modern chemistry of an element from antiquity

A copper(I) stannyl supported by a ring-expanded N-heterocyclic carbene has been synthesised and its reactivity towards heterocumulenes has been investigated.

The synthesis and isolation of the first stable lithium stannenolate is reported. Structural and spectroscopic data, in combination with DFT quantum-mechanical calculations, indicate that the stannenolate adopts the keto tautomeric structure.

A new layered metal sulfide composed of interlinking supertetrahedral T2 clusters as secondary building units is synthesized and structurally studied, which shows photoelectric response and ion exchange properties after activation.

While the reaction between three equivalents of the alkali metal phosphido-borane complexes [R₂P(BH₃)]M (M = Li, Na, K; R = Ph, iPr) with SnCl₂ gave the tris(phosphido-borane)stannates [M{R₂P(BH₃)}₃Sn], similar reactions between [tBu₂P(BH₃)]M and SnCl₂ gave the known hydrido-stannate [M{tBu₂P(BH₃)}₂Sn(H)].

The usefulness of stannylene cyanide (ATISnCN (5); ATI = aminotroponiminate) as a catalyst for the cyanosilylation of aldehydes is demonstrated.

Amidotin(II) benzamidinates were prepared via addition of Sn[N(SiMe₃)₂]₂ to mono-, di- and trinitriles. A reversible addition of [PhC(NSiMe₃)₂]SnN(SiMe₃)₂ with an excess of benzonitrile to its homoleptic [PhC(NSiMe₃)₂]₂Sn was studied by NMR and DFT.

A series of imine and amine Schiff-base tin(II) complexes were synthesized. Complexes having dimethylamino side arm appears to be innocent while those having pyridyl side arm underwent unusual ligand dimerization.

The work describes the synthesis of a series of germylenes and stannylenes (1–6) supported by pyridylpyrrolido (PyPyr) ligand. The catalytic utility of stannylene 5 towards hydroboration of a range of organic compounds is further explored.

The syntheses of [2-(CH₃ECH₂)C₆H₄]PbPh_3−nCl_n, (n = 0, E = O (4), E = S (5); n = 1, E = O (6), E = S (7); n = 2, E = O (8), are described.

N-donor stabilized tin(II) cations were synthesized by a chloride abstraction from neutral complexes or by an auto-ionization concept. Prepared tin(II) cations are universal catalysts for the production of linear and star-shaped PLAs via ROP.

The reaction of SnCl with the bulky substituents Hyp^tBuMe₂ and Hyp^Et₃ leads to the formation of two isostructural Sn₁₀-clusters, showing novel coordination polymers in the solid state and high thermal stability in solution.

Isolation of new bidentate NHCP ligands was achieved by reaction of a bis(dichlorophosphine) with a NHC and subsequent dichlorination. The NHCPs were used in synthesis of stannyliumylidenes, transmetalation, as well as Sn(II) transfer reaction.

Iminophosphonamido tin(II) chloride 1 can act as a precatalyst for the hydroboration of aldehydes, ketones, and imines at −10 °C.

Abstraction of fluoride from tin(IV) fluoride complexes bearing neutral phosphine ligands yields mono, di- and tri-fluoride complexes with retention of two phosphines, whereas with neutral O- and N-donor trifluoride cations, dications are formed.

The suite of heterobimetallic ytterbium(II) tetryls [Yb{E(SiMe3)3}2·(thf)x] (E = Si, Ge, Sn) have been synthesised, and their bonding and electronic properties have been comprehensively investigated.

A series of homo- and hetero-leptic Sn(II) aminoalkoxide complexes have been synthesised, characterised and the thermal properties of the homoleptic complexes assesed for their potential as ALD precursors for SnO thin films.

Two polymorphs of tin(IV) sulfates and a mixed-valent tin (II,IV) sulfate were characterised structurally, by Mössbauer, UV-vis, IR spectroscopy and thermally yielding three new structure types, two related to TiO₂ polymorphs or features therein.

Fluoro(dialkyl)stannylenoid 2 exhibits unique reactivity towards ethynes with acetylenic hydrogen and those with trimethylsilyl groups giving the corresponding 1 : 2 adducts.

Several bulky arene-bridged bis(amide) and bis(amidinate) ligands have been developed, and used in the syntheses of a series of bifunctional germanium(II) and tin(II) complexes (see picture; Dip and Ar^† = bulky aryls).

Reactions of a bis(boryl) tin complex towards carbon dioxide proceed via insertion into the Sn–B bond(s), with subsequent B–O reductive elimination leading to the net diboration of CO₂.