Though s-block organometallics are indispensable tools in synthetic chemistry, their impact homogeneous catalysis has been small compared to that for transition metals. Surprisingly, however, Group 1 and 2 compounds have recently utilised hydroelementation catalysis. For example, transfer hydrogenation of alkenes alkanes catalysed by (Ca, Sr, Ba) bis-hexamethyldisilazides (HMDS), though reactio...

Dimagnesium(I) complexes [{(Arnacnac)Mg}2], where Arnacnac = HC(MeCNAr)2, Ar Dip 2,6-iPr2-C6H3, Dep 2,6-Et2-C6H3, Mes 2,4,6-Me3-C6H2, react with iodoarenes in oxidative addition reactions. With iodobenzene, magnesium phenyl and iodide complex fragments were obtained, from a reaction 4-iodo-1,2,3,5-tetramethylpyrazolium iodide, [MePZI]I, the pyrazol-4-ylidene [(Dipnacnac)MgI(MePZ)] was structura...

aminocarboxylic acids, such as 2-aminobenzoic acid, react easily with [ir(cod)(pme3)3]cl, (cod=1,5-cyclooctadiene), in thf to produce hydridoaminocarboxylato iridium(iii) complexes in high yields. these octahedral complexes are formed via oxidative addition reaction of the o-h bond of the carboxylic group with the central metal. the starting iridium(i) complex losses the cod molecule, the chlor...

The ability of hesperidin (HP) to form complexes with five metals; cobalt, nickel, zinc, calcium and magnesium was investigated. The complexation was studied using U.V spectroscopic titration, in methanol as well as aqueous buffer solutions (physiological conditions). Potential complexes were studied by IR and NMR spectroscopy, melting point and their solubility were also evaluated. The interac...

A new class of cyclopentadiene-bis(oxazoline) compounds and their piano-stool-type organometallic complexes have been prepared as catalysts for hydroamination of aminoalkenes. The two compounds MeC(Ox)2C5H5 (BoCpH; Ox = 4,4-dimethyl-2-oxazoline) and MeC(Ox)2C5Me4H (Bo CpH) are synthesized from C5R4HI (R = H, Me) and MeC(Ox)2Li. These cyclopentadienebis(oxazolines) are converted into ligands tha...

Magnesium plays a special role in biochemistry because of its ability to coordinate six oxygen atoms efficiently in its first coordination shell. Such oxygen atoms may be part of one or two charged oxyanions, which means that Mg²⁺ can, for instance, tie together two different phosphate groups that are located at distance from each other in a macromolecule, and in this way be responsible for the...