Diverse Reactions of α-Diimine-Ligated Mg -Mg -Bonded Compound with Carbodiimides.

The α-diimine-ligated dimagnesium(I) compound [K(thf) ] [LMg-MgL] (1, L=[(2,6-iPr C H )NC(Me)] ) displays diverse reactivities toward carbodiimides (RN=C=NR) with different R substituents. In the reaction of 1 with Me SiNCNSiMe , one of the easily leaving trimethylsilyl groups is lost to yield the Me SiNCN moiety that either bridges two Mg centers (2) or terminally coordinated (3). In contrast, with the similarly bulky tBuNCNtBu, the carbodiimide inserts into Mg-Mg bond with accompanying C-H activation of a ligand or solvent (products 4 and 5).

Associations between tobacco and alcohol use and aggressive behavior among adolescents in 55 Low- and Middle-Income countries.

Background: Aggressive behavior has become a serious public health problem among adolescents worldwide. We aimed to assess the associations between tobacco and alcohol use and aggressive behavior among adolescents in 55 Low- and Middle-Income countries (LMICs).

Methods: Data from 55 LMICs that had done a Global School-based Student Health Survey (GSHS) between 2009 and 2017, comprising 187,787 adolescents aged 12-17 years, were used to examine the associations between tobacco and alcohol use and aggressive behavior.

Mg-Mg-bonded compounds with N,N'-dipp-substituted phenanthrene-diamido and o-phenylene-diamino ligands.

Two Mg-Mg-bonded compounds were synthesized by using the ligands N,N'-bis(dipp)-phenanthrene-9,10-diimine (L2) and N,N'-bis(dipp)-o-phenylenediamine (H2L3; dipp = 2,6-diisopropylphenyl). These new Mg(i) species were characterized by X-ray diffraction, NMR, UV-Vis and fluorescence spectroscopy, and DFT computations. Their reactions with unsaturated organic molecules were examined.

Synthesis and structure of a new trinuclear nickel(II) complex bridged by N-[3-(Dimethylamino)propyl]-N'-(2-hydroxyphenyl)oxamido: in vitro anticancer activities, and reactivities toward DNA and protein.

A new trinickel(II) complex bridged by N-[3-(dimethylamino)propyl]- N'-(2-hydroxylphenyl)oxamido (H pdmapo), namely [Ni (pdmapo) (H O) ]⋅4CH OH, was synthesized and characterized by X-ray single-crystal diffraction and other methods. In the molecule, two symmetric cis-pdmapo mononickel(II) complexes as a "complex ligand" using the carbonyl oxygen atoms coordinate to the center nickel(II) ion situated on an inversion point. The Ni···Ni distance through the oxamido bridge is 5.

The associations of heavy metals with crystalline iron oxides in the polluted soils around the mining areas in Guangdong Province, China.

In current selective sequential extraction (SSE) methods, heavy metals associated well-crystallized iron oxyhydroxides are not well defined and considered, and usually fall into residual forms, which actually make their mobility and environmental risk underestimated. This study compared various fractions of heavy metals in samples of mining tailings and nearby soils under different land uses in Guangdong Province of China. Iron oxides in these soils were mainly Al-substituted goethites and/or hematites.