Synthesis, detailed geometric analysis and bond-valence method evaluation of the strength of π-arene bonding of two isotypic cationic prehnitene tin(II) complexes: [{1,2,3,4-(CH3 )4 C6 H2 }2 Sn2 Cl2 ][M Cl4 ]2 (M = Al and Ga)

Acta Crystallographica. Section E, Crystallographic Communications
Johannes Merkelbach, Walter Frank

Abstract

From solutions of prehnitene and the ternary halides (SnCl)[MCl4] (M = Al, Ga) in chloro-benzene, the new cationic SnII-π-arene complexes catena-poly[[chlorido-aluminate(III)]-tri-μ-chlorido-4':1κ2Cl,1:2κ4Cl-[(η6-1,2,3,4-tetra-meth-yl-benzene)-tin(II)]-di-μ-chlorido-2:3κ4Cl-[(η6-1,2,3,4-tetra-methyl-benzene)-tin(II)]-di-μ-chlorido-3:4κ4Cl-[chlorido-aluminate(III)]-μ-chlorido-4:1'κ2Cl], [Al2Sn2Cl10(C10H14)2] n , (1) and catena-poly[[chlorido-gallate(III)]-tri-μ-chlor-ido-4':1κ2Cl,1:2κ4Cl-[(η6-1,2,3,4-tetra-methyl-benzene)-tin(II)]-di-μ-chlorido-2:3κ4Cl-[(η6-1,2,3,4-tetra-methyl-benzene)-tin(II)]-di-μ-chlorido-3:4κ4Cl-[chlor-ido-gallate(III)]-μ-chlorido-4:1'κ2Cl], [Ga2Sn2Cl10(C10H14)2] n , (2), were isolated. In these first main-group metal-prehnitene complexes, the distorted η6 arene π-bonding to the tin atoms of the Sn2Cl22+ moieties in the centre of [{1,2,3,4-(CH3)4C6H2}2Sn2Cl2][MCl4]2 repeating units (site symmetry ) is characterized by: (i) a significant ring slippage of ca 0.4 Å indicated by the dispersion of Sn-C distances [1: 2.881 (2)-3.216 (2) Å; 2: 2.891 (3)-3.214 (3) Å]; (ii) the non-methyl-substituted arene C atoms positioned closest to the SnII central atom; (iii) a pronounced tilt of the plane of the arene liga...Continue Reading

References

Jan 1, 1995·Acta Crystallographica. Section A, Foundations of Crystallography·R H Blessing
Sep 16, 2011·Chemistry : a European Journal·Annemarie SchäferThomas Müller
Dec 30, 2014·Acta Crystallographica. Section A, Foundations and Advances·George M Sheldrick
Jan 9, 2015·Acta Crystallographica. Section C, Structural Chemistry·George M Sheldrick
Apr 7, 2016·Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials·Colin R GroomSuzanna C Ward
Dec 19, 2017·Acta Crystallographica. Section E, Crystallographic Communications·Stephan W Prömper, Walter Frank

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