Lewis base mediated autoionization of GeCl2 and SnCl2.

Journal of the American Chemical Society (2012-02-15)
Amit Pratap Singh, Herbert W Roesky, Elena Carl, Dietmar Stalke, Jean-Philippe Demers, Adam Lange
ABSTRACT

Cationic and anionic species of heavier low-valent group 14 elements are intriguing targets in main group chemistry due to their synthetic potential and industrial applications. In the present study, we describe the synthesis of cationic (MCl(+)) and anionic (MCl(3)(-)) species of heavier low-valent group 14 elements of germanium(II) and tin(II) by using the substituted Schiff base 2,6-diacetylpyridinebis(2,6-diisopropylanil) as Lewis base (LB). Treatment of LB with 2 equiv of GeCl(2)·dioxane and SnCl(2) in toluene gives compounds [(LB)Ge(II)Cl](+)[Ge(II)Cl(3)](-) (1) and [(LB)Sn(II)Cl](+)[Sn(II)Cl(3)](-) (2), respectively, which possess each a low-valent cation and an anion. Compounds 1 and 2 are well characterized with various spectroscopic methods and single crystal X-ray structural analysis.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Tin(II) chloride, reagent grade, 98%
Sigma-Aldrich
Tin(II) chloride dihydrate, ACS reagent, 98%
Sigma-Aldrich
Tin(II) chloride dihydrate, reagent grade, 98%
Sigma-Aldrich
Tin(II) chloride, anhydrous, powder, ≥99.99% trace metals basis
Sigma-Aldrich
Tin(II) chloride dihydrate, ≥99.995% trace metals basis
Sigma-Aldrich
Tin(II) chloride dihydrate, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥98%
Sigma-Aldrich
Tin(II) chloride, ≥99.99% trace metals basis
Supelco
Tin(II) chloride dihydrate, suitable for AAS
Sigma-Aldrich
Tin(II) chloride dihydrate, ≥99.99% trace metals basis
Sigma-Aldrich
Germanium(IV) chloride, 99.99% trace metals basis
Sigma-Aldrich
Germanium(IV) chloride, 99.999% trace metals basis