NDLI: Spectroscopic, electrochemical, and alkylation reactions: tert-butyl N-(2-mercaptoethyl)carbamate copper(II) and nickel(II) complexes as structural mimics for the active site of thiolate-alkylating enzymes.

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Spectroscopic, electrochemical, and alkylation reactions: tert-butyl N-(2-mercaptoethyl)carbamate copper(II) and nickel(II) complexes as structural mimics for the active site of thiolate-alkylating enzymes.

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Spectroscopic, electrochemical, and alkylation reactions: tert-butyl N-(2-mercaptoethyl)carbamate copper(II) and nickel(II) complexes as structural mimics for the active site of thiolate-alkylating enzymes.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	El-Shafai, Nagi Ibrahim, Mohamed M. Mersal, Gaber A. M. Ramadan, Abdel-Motaleb M. Youssef, Mohamed M.
Description	Author Affiliation: Ibrahim MM ( Department of Chemistry, Faculty of Science, Taif University, Taif, Saudi Arabia); Mersal GA ( Department of Chemistry, Faculty of Science, Taif University, Taif, Saudi Arabia); El-Shafai N ( Department of Chemistry, Faculty of Science, Kafr El-Sheikh University, Egypt.); Ramadan AM ( Department of Chemistry, Faculty of Science, Kafr El-Sheikh University, Egypt.); Youssef MM ( Department of Chemistry, Faculty of Science, Taif University, Taif, Saudi Arabia)
Abstract	Two new dithiolate copper(II) and nickel(II) complexes with the ligand tert-butyl N-(2-mercaptoethyl)-carbamate (Boc-SH) were prepared. Their structures were established to be [(Boc-S)2M], where M=Cu (1) and Ni (2) by using elemental analysis, thermal analysis, molar conductivity, FT-IR, Raman, UV/VIS, and ESR as well as EI-mass spectroscopic methods. The X-ray structure of the ligand Boc-SH was also determined. Spectral data showed that the carbamate ligand act as anioinic bidentate through one immine nitrogen and one thiolate sulfur donor atoms. The spectral techniques suggest that both complexes appear to have square planar geometries. The very low electrical conductance of the two complexes supports their neutral nature. The redox behaviors of the obtained complexes were also investigated by cyclic voltammetry. The monomeric nature of both complexes was assessed from their magnetic susceptibility values. The thermoanalytical data evidence that complex (2) is stable up to 165°C and undergo complete decomposition, resulting in NiO as a residual product. The TEM image of the obtained oxide residue showed its nanosize cluster, suggesting that complex (2) may be used as a precursor for the formation of nanooxide. The methylation reactions of the two dithiolate complexes (1) and (2) with methyl iodide appear to occur intramolecularly at the metal(II)-bound dithiolates, forming the metal(II)-bound dithioether complexes [M(Boc-SCH3)2]I2 with clean second-order constants of 7.95×10(-2) and 10.59×10(-2) M(-1) s(-1), respectively.
ISSN	13861425
Volume Number	120
e-ISSN	18733557
Journal	Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Language	English
Publisher	Elsevier
Publisher Date	2014-01-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biomimetic Materials Chemistry Carbamates Coordination Complexes Copper Nickel Sulfhydryl Compounds Alkylation Biocatalysis Catalytic Domain Crystallography, X-ray Electrochemical Techniques Escherichia Coli Enzymology Escherichia Coli Proteins Methylation O(6)-methylguanine-dna Methyltransferase Oxidation-reduction Spectrophotometry, Infrared Spectrum Analysis, Raman Transcription Factors Journal Article Research Support, Non-u.s. Gov't Discipline Spectroscopy
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Atomic and Molecular Physics, and Optics Analytical Chemistry Instrumentation

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