Me3P complexes of p-block Lewis acids SnCl4, SnCl3+ and SnCl22+

Abstract

Reactions of Me(3)P with SnCl(4) in the presence of nAlCl(3) (n = 0, 1, 2) yields a series of P-Sn complexes illustrating new bonding environments for tin.

Exploring structural trends for complexes of Me2E(OSO2CF3)2 (E = Si, Ge, Sn) with pyridine derivatives

“…The distinct structural differences for the series of Me 2 E(dmap) 2 (OTf ) 2 derivatives is in marked contrast to the essentially invariant distorted octahedral structures of the series trans-ECl 4 L 2 , for E = Si, Ge or Sn, L = pyridine or PMe 3 . [3][4][5][6][7][8] Furthermore, the observed cis-configuration of the ligands in all three complexes (Fig. 2a) contrasts the transconfiguration reported for derivatives of EX 4 L 2 in the solid-state (Fig.…”

“…For example, a vast array of coordination complexes has been established for compounds of tin, 2 while compounds involving silicon or carbon as acceptors are rare. Nevertheless, silicon, germanium and tin-tetrahalides (EX 4 ; E = Si, Ge, Sn; X = Cl or Br) are all sufficiently Lewis acidic to form isolable octahedral complexes of the general formula trans-EX 4 L 2 (E = Si, Ge, Sn; L = PMe 3 or pyridine) [3][4][5][6][7][8] with monodentate donors, while chelating ligands give cis configurations. [9][10][11] Interestingly, despite previous reports of complexes of the related acceptor Me 2 SnCl 2 , 12,13 analogous compounds have not been observed for Me 2 SiCl 2 or Me 2 GeCl 2 .…”

“…[9][10][11] Interestingly, despite previous reports of complexes of the related acceptor Me 2 SnCl 2 , 12,13 analogous compounds have not been observed for Me 2 SiCl 2 or Me 2 GeCl 2 . Recognizing that exchange of halide substituents at a potential tetrael acceptor centre for weaklycoordinating anions can facilitate coordination of neutral ligands, 3,[14][15][16][17][18] we have studied complexes of Me 2 E(OTf) 2 (E = Si, Ge, Sn; OTf = OSO 2 CF 3 , trifluoromethanesulfonyl) with pyridine derivative ligands. Herein we describe structural trends which evolve the coordination chemistry of the tetrael elements, and have implications for the p-block elements in general.…”

Tin(iv) fluoride complexes with neutral phosphine coordination and comparisons with hard N- and O-donor ligands

“…8 Formation of tin(IV) cations can be achieved by using halide abstractors such as AlCl 3 , CF 3 SO 3 SiMe 3 (TMSOTf) or Na[BAr F ] (BAr F = B{3,5-(CF 3 ) 2 (C 6 H 3 ) 4 } -). 9,10 Tin(IV) fluoride contains six-coordinate tin in vertex sharing octahedra 11 and although readily hydrolysed, is unreactive towards many neutral ligands. As a result of the lack of commercial availability and this limited reactivity, its coordination chemistry was little explored until recently; only one crystal structure was reported (for the complex [SnF 4 (2,2'-bipy)]) and spectroscopic data were limited.…”

Neutral and cationic phosphine and arsine complexes of tin(iv) halides: synthesis, properties, structures and anion influence

“…5,6 The formation of cationic complexes would be expected to enhance the Lewis acidity of the tin centre, and examples of halo-or organo-tin cations with polydentate and pincer ligands have been described. [7][8][9][10][11][12] MacDonald et al 11 2+ . In the present work we have explored the reaction of tin(IV) halides with a series of mono-and bi-dentate phosphine, arsine and stibine ligands and the abstraction/replacement of some of the halides from the resulting complexes by other weakly coordinating anions, including triflate ([CF 3 SO 3 ] − ) via treatment with trimethylsilyltriflate, [AlX 4 ] − via addition of aluminium trihalides and using the large diffuse [BAr F ] − anion, via addition of its Na + salt (BAr F = [B{3,5-(CF 3 ) 2 C 6 H 3 } 4 ] − ).…”