Mercury(II) compounds with high coordination numbers

Synthesis and Spectroscopic Characterization of Some New Coordination Compounds of Organotin (IV) with Carbohydrazones

Some new coordination compounds of tin(IV) having general formula [SnBu2 (L)2 ] (where L = carbohydrazone ligand) have been synthesized by the reaction of dibutyltin oxide with carbohydrazone ligands with the ratio of 1:2 (metal- ligand) using dry benzene as a reaction medium. The newly synthesized complexes were characterized by elemental analysis, molecular weight determinations, conductivity...

Organozinc Coordination Chemistry and Catalytic Effects of Organozinc Coordination Compounds

A review of the present state of organozinc coordination chemistry. with special emphasis on compounds of the type RZnX is given. Their preparation as well as some factors determining their structure and stability are discussed. Certain organozinc coordination compounds have been found to be effective catalysts for cyclo-oligomerization and polymerization reactions. in particular of oxygen-cont...

Averaged coordination numbers of planar aperiodic tilings

We consider averaged shelling and coordination numbers of aperiodic tilings. Shelling numbers count the vertices on radial shells around a vertex. Coordination numbers, in turn, count the vertices on coordination shells of a vertex, defined via the graph distance given by the tiling. For the Ammann-Beenker tiling, we find that coordination shells consist of complete shelling orbits, which enabl...

Unexpected structural motifs in diamine coordination compounds with allyllithium.

New diamine coordination compounds with phenyllithium and allyllithium are presented. One of them is the first diamine complex containing two different, simple organolithium reagents. The formation of this unexpected compound is explained using quantum chemical calculations.

Photochemistry of Transition Metal Coordination Compounds