Reactions of metallic Ba with benzofuranol (dbbfoH) or diethylene glycol give homoleptic and homonuclear complexes Ba(dbbfo)(2)(dbbfoH)(2).3dbbfoH and Ba{O(CH(2)CH(2)O)(2)}{O(CH(2)CH(2)OH)(2)}(2) (60-89%). Both compounds and formerly described Ba{O(CH(2)CH(2)O)(2)Me}(2) react with Al(CH(3))(3) to yield trinuclear heterobimetallic low-coordinated barium compounds with structure and geometry depending on the reaction stoichiometry and crystallization procedure.
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http://dx.doi.org/10.1021/ic0503129 | DOI Listing |
Chem Sci
December 2024
Frontier Institute of Science and Technology, State Key Laboratory of Electrical Insulation and Power Equipment, MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter, Xi'an Key Laboratory of Electronic Devices and Materials Chemistry and School of Chemistry, Xi'an Jiaotong University 99 Yanxiang Road Xi'an Shaanxi 710054 P. R. China
The benzene tetraanion-bridged rare earth inverse arene amidinate complexes [{Ln(κ:η-Piso)}(μ-η:η-CH)] (2-Ln, Ln = Gd, Tb, Dy, Y; Piso = {(NDipp)C Bu}, Dipp = CH Pr-2,6) were prepared by the reduction of parent Ln(iii) bis-amidinate halide precursors [Ln(Piso)X] (Ln = Tb, Dy; X = Cl, I) or [Ln(Piso)I] (Ln = Gd, Y) with 3 eq. KC in benzene, or by the reaction of the homoleptic Ln(ii) complexes [Ln(Piso)] (Ln = Tb, Dy) with 2 eq. KC in benzene.
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December 2024
School of Chemistry, University of Leicester, University Road, Leicester LE1 7RH, UK.
A series of homoleptic rare earth (RE) complexes bearing phosphino-aryloxide ligands (, ) has been prepared. The complexes have been characterised using multinuclear NMR and IR spectroscopy, X-ray crystallography and elemental analysis. Structural characterisation highlighted the different RE-P interactions as a result of differing Lewis acidity and ionic size across the series, hinting at the possibility of FLP-type activity.
View Article and Find Full Text PDFDalton Trans
December 2024
Institute for Organic Synthesis and Photoreactivity (ISOF), National Research Council of Italy (CNR), Via Piero Gobetti 101, 40129 Bologna, Italy.
The 4-methyl-2-(pyridin-2-yl)-2,1-borazaronaphthalene molecule Hazab-py has been successfully used, for the first time, as a ligand in a ruthenium(II) polypyridine complex A (with the formula [Ru(dtbbpy)(azab-py)], where dtbbpy = 4,4'-di--butyl-2,2'-bipyridine). This compound was characterized by NMR spectroscopy and high-resolution mass spectrometry (MS), and its electrochemical and photophysical properties were fully investigated and compared to those of its homoleptic analogue [Ru(dtbbpy)] (B), an archetypical mono-cationic cyclometalated complex C (with the formula [Ru(dtbbpy)(ppy)], where Hppy = 2-phenylpyridine), and the more structurally similar analogue [Ru(dtbbpy)(naft-py)] (D), where the B-N unit of the azaborine ligand is replaced by a standard CC one, resulting in the 2-(naphthalen-2-yl)pyridine ligand (Hnaft-py). The presence of the novel 1,2-azaborine ligand induces a 0.
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January 2025
School of Chemistry, Monash University, Clayton, Melbourne, VIC 3800, Australia.
Five complexes of gallium derived from hydroxamic acids have been synthesised, characterised, and their anti-bacterial activity and mammalian cell toxicity established. These are three metal-organic complexes; [Ga(BPHA)] 1, [Ga(BHA-)] 2, [Ga(SHA-)(SHA-)] 3, and two heteroleptic organometallic complexes [GaMe(BPHA)] 4, and [GaMe(BHA-)] 5, along with the iron complex [Fe(BPHA)] 6 (BPHA-H = -benzoyl--phenylhydroxamic acid, BHA-H = phenylhydroxamic acid, and SHA-H = salicylhydroxamic acid). Solid-state structures of 1, 4-6 were identified by single-crystal X-ray crystallography.
View Article and Find Full Text PDFInorg Chem
November 2024
Department of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
Modulation of the crystal field (CF) in lanthanide (Ln) complexes can enhance optical and magnetic properties, and large CF splitting can be achieved with low coordination numbers in specific geometries. We previously reported that the homoleptic near-linear Sm complex [Sm{N(SiPr)}] () is oxidized by the 2,2,6,6-tetramethylpiperidinyl-1-oxy (TEMPO) radical to give the heteroleptic, approximately trigonal planar Sm complex, [Sm{N(SiPr)}(TEMPO)] (). Here, we report the synthesis of homologous [Ln{N(SiPr)}(TEMPO)] (; Ln = Tm, Yb) complexes by the oxidation of the parent [Ln{N(SiPr)}] (; Ln = Tm, Yb) with TEMPO; complexes all contain TEMPO anions.
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