Two synthetic approaches for the preparation of tin(ii) dications. Issue 79 (20th September 2017)

• Record Type: Journal Article
• Authors: Schleep, Mario; Hettich, Clarissa; Kratzert, Daniel; Scherer, Harald; Krossing, Ingo
• Is Part Of: Chemical communications. Volume 53:Issue 79(2017)
• Page Start: 10914
• Page End: 10917
• Publication Date: 2017-09-20
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c7cc06201j
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : Facile access to weakly coordinated Sn(ii ) salts is provided by reaction of NO[Al(OR F )4 ] with tin metal. Further use is indicated. Abstract : Examples of tin dications without closer contacts to the anion are rare, as are straightforward routes to weakly coordinated tin(ii ) dication salts. Here we report on the synthesis of [Sn(MeCN)6 ][Al(OR F )4 ]2 (R F = C(CF3 )3 ) via NO + -oxidation of tin metal. Subsequently, [Sn(MeCN)6 ][Al(OR F )4 ]2 was used to prepare the mixed coordinated [Sn(pyr)2 (MeCN)4 ][Al(OR F )4 ]2 and [Sn(PPh3 )2 -(MeCN)5 ][Al(OR F )4 ]2 ·MeCN. Additionally, [Sn(dmap)4 ][Al(OR F )4 ]2 was prepared via a reaction of dmap with [SnCp][Al(OR F )4 ]. The generality of the formation of tin(ii ) dications by reacting [SnCp] + and L to give [SnL x ] 2+ and SnCp2 was investigated using DFT calculations. Extensions to [ECp*] + cations (E = Si, Ge, Sn, and Pb) are also suggested to be useful for the preparation of E(ii ) dications.