A New Versatile Tool for Isomerization: Synthesis and Characterization of Lanthanide Chloride Tridendate Schiff base Derivatives

Sadaf ul Hassan1,*, Faiza Kazmi2, Rashid Abro3 and Muhammad Ammar3

1Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P.R. China

2Institute of Chemistry, University of Punjab, Lahore, Pakistan

3Beijing Key Laboratory of Membrane Science & Technology, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China

*Corresponding author: E-mail: sadafulhassan@pku.edu.cn

Abstract

The different types of the tridentate Schiff base N-(2-methoxyphenyl) salicylideneamine derivative of lanthanideindenyl chloride complexes [Ind·Ln·Schiff base·Cl·2THF (Ln = Sm, Eu, Gd and Er)] along with NaH are proved to be a versatile tool for the isomerization of 1,5-hexadiene. The isomerization resulted in a mixture of hexa-1, 4-diene, hexa-2,4-diene, methylenecyclopentane and methylcyclopentene. Hexa-1,4-diene and methylenecyclopentane were the major products while hexa-2,4-diene and methylcyclopentene were the minor ones. The results showed that ligand size and radius of the metal are important factors in determining the catalytic efficiency of the complexes.

Keywords

Schiff base, Indene, Lanthanocene, Hexa-1,5-diene, Isomerization.

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