Catalyic Activity of Ruthenium(III) and Palladium(II) Complexes of 2-Methylbenzimidazole (Mebzlh) Encapsulated in Zeolite-Y and ZSM-5 for Liquid Phase Hydroxylation of Phenol | Zendy

B. P. Nethravathi | Zendy; K. N. Mahendra | Zendy

Open Access

Catalyic Activity of Ruthenium(III) and Palladium(II) Complexes of 2-Methylbenzimidazole (Mebzlh) Encapsulated in Zeolite-Y and ZSM-5 for Liquid Phase Hydroxylation of Phenol

Author(s) -

B. P. Nethravathi,

K. N. Mahendra

Publication year - 2012

Publication title -

mapana journal of sciences

Language(s) - English

Resource type - Journals

ISSN - 0975-3303

DOI - 10.12723/mjs.21.2

Subject(s) - catechol , hydroquinone , phenol , ruthenium , selectivity , palladium , zeolite , chemistry , catalysis , hydroxylation , ligand (biochemistry) , substrate (aquarium) , inorganic chemistry , nuclear chemistry , organic chemistry , biochemistry , oceanography , receptor , enzyme , geology

Ruthenium(III) and palladium(II) complexes of 2-methylbenzimidazole (Mebzlh) ligand encapsulated in the super cages of zeolite-Y and ZSM-5 have been synthesized and characterized by various physico-chemical measurements. A suitable reaction condition has been optimized for [Ru(Mebzlh)]-Y by considering the effect of various parameters such as different solvents, concentration of substrate, reaction time and amount of oxidant etc., for the maximum conversion of phenol to a mixture of catechol and hydroquinone. The results obtained showed that selectivity for the catechol formation is ca. 85%, even though the conversion of phenol varies in the order [Ru(Mebzlh)]-Y (35%) > [Pd(Mebzlh)]-Y (15 %) > [Ru(Mebzlh)]- ZSM-5(10 %) > [Pd(Mebzlh)]- ZSM-5 (2 %) after 6 h of reaction time.

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