Coordination propensity of N-protected amino acids and sterically congested heterocyclic β-diketones toward BuSnCl3: preparation and structural features of some new seven coordinated organic-inorganic hybrid formulations of monobutyltin(IV)

Abstract

A new set of N-protected amino acids and sterically congested heterocyclic β-diketones-modified BuSnCl3 formulations having the general formulae BuSnClAL, where [where -CHR=-CH2 CH2,R= -CH(CH3)CH2 CH3] and [where R′=-C6 H5, -CH3, -pClC6 H4] and BuSn(A)2 L, where [where -CHR=-CH2 CH2, R=- CH(CH3)CH2 CH3] and [where R′=-C6 H5, -CH3, -pClC6 H4] were prepared by the reactions of monobutyltin(IV) chloride with sodium salts of N-protected amino acids and sterically congested heterocyclic β-diketones in 1:1:1 and 1:2:1 molar ratios in refluxing dry THF. Plausible structures of these N-protected amino acids and sterically congested heterocyclic β-diketones-modified BuSnCl3 formulations were suggested on the basis of physicochemical and spectral studies. These newly prepared organic-inorganic hybrid complexes of monobutyltin(IV) contain seven coordinated tin centers as revealed by 119Sn NMR spectral data.

Keywords

• busncl3
• heterocyclic β-diketones
• n-protected amino acids
• spectral studies