The structure of a novel metallamacrocyclic phosphine gold(I) thiolate cluster, [Au9(mu-dppm)4(mu-p-tc)6](PF6)3, where dppm = bis(diphenylphosphine)methane and p-tc = p-thiocresolate, is reported and shows AuAu attractions of approximately 3.0 A and gold(I) atoms linked to thiolate and phosphine ligands in distorted trigonal and nearly linear geometries.
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http://dx.doi.org/10.1039/b415488f | DOI Listing |
Angew Chem Int Ed Engl
June 2023
Department of Chemistry, Graduate School of Science, Osaka Metropolitan University Naka-ku, Sakai-shi, Osaka, 599-8531, Japan.
In this work, we aimed to develop a dicyanomethyl radical that undergoes both reversible C-C bond formation/dissociation and metal-ligand coordination reactions to combine dynamic covalent chemistry (DCC) based on organic radicals with coordination chemistry. We have previously reported a dicyanomethyl radical conjugated with a triphenylamine (1⋅) that exhibits a monomer/dimer equilibrium between the σ-bonded dimer (1 ). We designed and synthesized a novel dicyanomethyl radical with a pyridyl group as a coordination point (2⋅) by replacing the phenyl group of 1⋅ with a 3-pyridyl group.
View Article and Find Full Text PDFChem Commun (Camb)
November 2021
School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China.
An unprecedented bisthianthrene dipyridyl ligand was designed and synthesized for coordination driven self-assembly. The combination of this conformationally dynamic linker with a 90° convergent metal corner exclusively afforded a novel ML truncated square-like metallamacrocycle. The single crystal X-ray structure reveals a belt-shaped geometry with a cavity diameter of 13.
View Article and Find Full Text PDFMolecules
September 2020
G.A. Razuvaev Institute of Organometallic Chemistry RAS, 603950 Nizhny Novgorod, Russia.
Recently there has been a great deal of interest and associated research into aspects of the coordination chemistry of lanthanides and bismuth-elements that show intriguing common features. This work focuses on the synthesis and characterization of a novel bismuth(III) polynuclear metallamacrocyclic complex derived from aminohydroxamic acid, in order to compare the coordination ability of Bi with the similarly sized La ions. A polynuclear tyrosinehydroximate Bi(OH)[15-MC-5](NO) () was obtained according to the synthetic routes previously described for water-soluble Ln(III)-Cu(II) 15-MC-5 metallacrowns.
View Article and Find Full Text PDFInorg Chem
September 2020
Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Ji'nan 250100, PR China.
We present an unprecedented copper(II)-assisted organic ligand fragmentation process under basic conditions leading to several ligands within three families of metallamacrocycle, Cu, Cu, and Cu. The sequential multistep reaction include (i) the deprotonation of the starting alcohol, 1,2-bis(3,5-dimethyl-pyrazol-1-yl)ethane-1,2-diol () to its diolate followed by complexation through six bonds (μ) to three copper atoms in a ring, (ii) the breaking of the ethane-pyrazole C-N bonds by the different solvent alcohols to form 1-(3,5-dimethyl-pyrazol-1-yl)-2-methoxyethane-1,2-diolate () or 2-(3,5-dimethyl-pyrazol-1-yl)-2-hydroxyacetate (), while retaining coordination to the copper centers and (iii) the final step to ethane-1,1,2,2-tetraolate, CHO (). Importantly, the latter product, only observed on two previous occasions, occupies the core of Cu and Cu through exceptionally eight coordination bonds (μ).
View Article and Find Full Text PDFChem Sci
January 2018
Beijing National Laboratory for Molecular Sciences (BNLMS) , Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education , College of Chemistry , Peking University, Beijing 100871 , China . Email: ; Email:
Metalloaromatic species are unique and important both experimentally and theoretically. Significant progress has been made during the past few decades. New aromatic systems have challenged and extended the concept of aromaticity remarkably.
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