Dalton Transactions Blog

In this Dalton Transactions Hot Article, Cameron Jones and colleagues from Monash University, Australia prepared a series of extremely bulky secondary amines.

Deprotonation of the amines with LiBuⁿ NaH or KH resulted in alkali metal amide complexes. Reaction of the amides with germanium, tin or lead chloride yielded the first two-coordinate monomeric amido germanium(II) and tin(II) chloride complexes and a chloride bridged amido-lead(II) dimer.

These compounds hold potential as precursors for kinetically stabilised low oxidation state and/or low coordination number main group complexes.

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Extremely bulky amido-group 14 element chloride complexes: Potential synthons for low oxidation state main group chemistry
Jiaye Li, Andreas Stasch, Christian Schenk and Cameron Jones
Dalton Trans., 2011, Advance Article
DOI: 10.1039/C1DT10678C, Paper

In this Dalton Transactions Hot Article, Tristram Chivers and colleagues from the University of Calgary have reported several new thallium and indium complexes of multidentate chalcogen-centred PCP-bridged ligands.

The binuclear mixed-valent Tl(I)/Tl(III) complex with ligand [(Se)C(PPh₂Se)₂]^2- exhibits a one-dimensional polymeric structure while in the polycyclic Tl(I)/Tl(I) complexes with [(SPh₂P)₂CE′E′C(PPh₂S)₂]^2-  (E′ = S, SE) the dimeric ligands remain intact.

Three heteroleptic In complexes were obtained by reaction of InCl₃ with [Li(TMEDA)][HC(PPh₂Se)₂], [Li(TMEDA)]₂[(E′)C(PPh₂E)₂] or [Li(TMEDA)]₂[(E′)C(PPh₂E)₂] (E = S, E′ = S, SE).

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Homoleptic, heteroleptic and mixed-valent thallium and indium complexes of multidentate chalcogen-centred PCP-bridged ligands
Maarit Risto, Tristram Chivers and Jari Konu
Dalton Trans., 2011, Advance Article
DOI: 10.1039/C1DT10646E, Paper

In this Dalton Transactions Hot Article, Maria-Angels Carvajal and colleagues probe the photomagnetic properties of a copper octacyanomolybdate complex using high level ab initio calculations.

The authors describe in detail the photomagnetic process arising from a local Mo d-d excitation in the complex. They also show that there is a small energy barrier for the reverse reaction and that it can be induced by light. They also investigate the temperature dependence of the magnetic susceptibility and compare it with experimental values.

Photomagnetic materials are of interest as candidates for use in memory devices and optical switches.

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Insights on the photomagnetism in copper octacyanomolybdates
Maria-Angels Carvajal, Rosa Caballol and Coen de Graaf
Dalton Trans., 2011, Advance Article
DOI: 10.1039/C1DT10120J, Paper

In this Dalton Transactions Hot Article, Graham Bowmaker from the University of Auckland and colleagues, synthesised three new disilver(I) carbonate/tertiary phosphine complexes.

Solution and mechanochemical methods were used. The use of the mechanochemical synthesis demonstrates an additional aspect of this type of method. The study also demonstrates the value of ATR IR and CPMAS NMR for monitoring the progress of mechanochemical synthesis.

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Solution and mechanochemical syntheses, and spectroscopic and structural studies in the silver(I) (bi-)carbonate: triphenylphosphine system
Graham A. Bowmaker, Effendy, John V. Hanna, Peter C. Healy, Scott P. King, Claudio Pettinari, Brian W. Skelton and Allan H. White
Dalton Trans., 2011, Advance Article
DOI: 10.1039/C1DT10416K, Paper

In this Dalton Transactions Hot Article, a team from the University of Florence, and Annie Powell from Karlsruhe Institute of Technology carried out a single crystal EPR study on a molecular nanomagnet (MNM).

The study was aimed at confirming the nature of the ground spin state and the fine determination of the magnetic anisotropy of an Fe₁₉ cluster.

Fe-based MNMs like the one reported in this study can be used as models for natural systems and provide clues for understanding the growth of inorganic cores in proteins.

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Single crystal EPR study at 95 GHz of a large Fe based molecular nanomagnet: toward the structuring of magnetic nanoparticle properties
L. Castelli, M. Fittipaldi, A. K. Powell, D. Gatteschi and L. Sorace
Dalton Trans., 2011, Advance Article
DOI: 10.1039/C1DT10311C, Paper

In this Dalton Transactions Hot Article, Fenghua Chen and colleagues prepared multifunctional nanoparticles composed of a Fe₃O₄–Au nanocomposite core and a porous silica shell.

The aim of the synthesis was to maintain the magnetic and optical properties of the nanocomposite while ensuring stability.

The catalytic activity of the product was tested on reduction of o-nitroaniline to benzenediamine by NaBH₄. The core/shell nanoparticles showed improved activity compared to Fe₃O₄–Au composite nanoparticles alone.

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Multifunctional nanocomposites constructed from Fe₃O₄–Au nanoparticle cores and a porous silica shell in the solution phase
Fenghua Chen, Qingtao Chen, Shaoming Fang, Yu’an Sun, Zhijun Chen, Gang Xie and Yaping Du
Dalton Trans., 2011, Advance Article
DOI: 10.1039/C1DT10374A, Paper

In this Dalton Transactions Hot Article, Sathiyendiran Malaichamy and colleagues prepared stable, luminescent rhenium-based metallacycles decorated with furan units.

The 2D rectangle with four furans and the 3D trigonal prism with six furans were synthesised from readily available starting materials in a one-pot procedure.

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Furan-decorated neutral Re(I)-based 2D rectangle and 3D trigonal prism
Deepak Gupta, Palanisamy Rajakannu, Bhaskaran Shankar, Ramasamy Shanmugam, Firasat Hussain, Biprajit Sarkar and Malaichamy Sathiyendiran
Dalton Trans., 2011, Advance Article
DOI: 10.1039/C0DT01227K, Communication