Halogen exchange in complexes of hexacoordinate tin (LnCH2)2SnX2 and (LnCH2)2SnY2 containing lactamomethyl n-membered C,O-chelate ligands LnCH2 (n = 5–7; X, Y = Cl, Br, I)

Negrebetskiy, Vadim V.; Korlyukov, Alexander A.; Bylikin, Sergey Yu; Tarasenko, Dmitry V.; Kramarova, Eugenija P.; Bassindale, Alan R.; Taylor, Peter G. and Baukov, Yuri I. (2022). Halogen exchange in complexes of hexacoordinate tin (LnCH2)2SnX2 and (LnCH2)2SnY2 containing lactamomethyl n-membered C,O-chelate ligands LnCH2 (n = 5–7; X, Y = Cl, Br, I). Journal of Organometallic Chemistry, article no. 122163.

DOI: https://doi.org/10.1016/j.jorganchem.2021.122163

Abstract

Halogen exchange reactions between hexacoordinate tin dihalides (LnCH2)2SnX2 and (LnCH2)2SnY2 (LnCH2 = C,O-chelate n-membered lactamomethyl ligand, n = 5–7, X, Y = Cl, Br, I) produce mixed dihalides (LnCH2)2SnXY. Along with the signals of original complexes, NMR 119Sn spectra of solutions containing two different homodihalides show the third signal with a median chemical shift. The results of NMR monitoring studies, conductivity data and quantum-chemical calculations suggest that mixed dihalides readily form in solutions, although these complexes have not been isolated as individual compounds.

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