Thioimidazolate versus pyrazolate-zinc(II)-bound hydroxo complex as structural model for the active site of hydrolytic enzyme: the crystal structure of the inclusion complex TtZn–O–C6H4–p-NO2, Tt = hydrotris(N-xylyl-2-thioimidazolyl)borate

Mohamed M. Ibrahim; Abd El-Motaleb. M. Ramadan

doi:10.1007/s10847-011-9947-0

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Thioimidazolate versus pyrazolate-zinc(II)-bound hydroxo complex as structural model for the active site of hydrolytic enzyme: the crystal structure of the inclusion complex TtZn–O–C6H4–p-NO2, Tt = hydrotris(N-xylyl-2-thioimidazolyl)borate

Journal article

Peer reviewed

Thioimidazolate versus pyrazolate-zinc(II)-bound hydroxo complex as structural model for the active site of hydrolytic enzyme: the crystal structure of the inclusion complex TtZn–O–C6H4–p-NO2, Tt = hydrotris(N-xylyl-2-thioimidazolyl)borate

Mohamed M. Ibrahim and Abd El-Motaleb. M. Ramadan

Journal of Inclusion Phenomena and Macrocyclic Chemistry, Vol.72(1-2), pp.103-111

01/02/2012

DOI: https://doi.org/10.1007/s10847-011-9947-0

Abstract

Chemistry

Chemistry and Materials Science

Crystallography and Scattering Methods

Food Science

Organic Chemistry

Original Article

The reaction of the tripod ligand hydrotris( N -(2-methylphenyl)-2-thioimidazol-1-yl)borate, Tt with zinc(II) chloride yielded the chloro complex [ Tt Zn–Cl] 1 . The hydrolytic reactivity of its hydroxo complex [ Tt Zn–(μ-OH)Zn Tt ]Cl 2 towards p -nitrophenyl acetate was hampered due to the formation of the stable phenolate complex [ Tt Zn–O–Ar– p -NO 2 ] 3 as a product inhibition. The X-ray structure analysis of complex 3 was determined and showed that its Zn[S 3 O] coordination sphere includes three thione donors from the ligand Tt and one oxygen donor from the hydrolysed product p -nitrophenolate in an ideally tetrahedral arrangement around the zinc(II) centre.

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Title: Thioimidazolate versus pyrazolate-zinc(II)-bound hydroxo complex as structural model for the active site of hydrolytic enzyme: the crystal structure of the inclusion complex TtZn–O–C6H4–p-NO2, Tt = hydrotris(N-xylyl-2-thioimidazolyl)borate
Creators - without role: Mohamed M. Ibrahim - Taif University
Abd El-Motaleb. M. Ramadan - Kafrelsheikh University
Publication Details: Journal of Inclusion Phenomena and Macrocyclic Chemistry, Vol.72(1-2), pp.103-111
Publisher: Springer Netherlands
Identifiers: 9911619108331
Academic Unit: Taif University
Language: English
Resource Type: Journal article