A series of ligands containing a 1,4-disubstituted 1,2,3-triazole unit have been used for the formation triple-stranded dinuclear Ru(II) complexes. In contrast to previously reported complexes labile metals, use inert enabled stereoisomeric mixtures diruthenium(II) be accessed. The chromatographic resolution enantiomers helicate more rigid 1,4-xylyl spacer was carried out on cellulose. ligand m...

Ab initio MP2/aug'-cc-pVTZ calculations have been carried out to investigate the structures, binding energies, and bonding characteristics of binary complexes HFBe:FCl, R2Be:FCl, and FCl:N-base, and of ternary complexes HFBe:FCl:N-base and R2Be:FCl:N-base for R = H, F, Cl; N-base = NH3, NHCH2, NCH. Dramatic synergistic cooperative effects have been found between the Be···F beryllium bonds and t...

The crystal structures of mono- and diperiodic lead(II) complexes with Kemp’s tricarboxylate are searched for possible effects the lone pair, particularly through Pb⋅⋅⋅H interactions. triacid (H 3 kta; cis,cis- 1,3,5-trimethylcyclohexane-1,3,5-tricarboxylic acid) has been used to synthesize three under solvo-hydrothermal conditions. [Pb (kta)Cl ] ( 1 ) kta)(kta) 2 both coordination polymers dis...

We find strong necessary conditions on the f -vectors, Betti sequences, and relative Betti sequence of a pair of simplicial complexes. We also present an example showing that these conditions are not sufficient. If only the difference between two Betti sequences is specified, and not the individual Betti sequences, then the characterization is complete, and the characterization of all pairs of ...

Ab initio MP2/aug’-cc-pVTZ calculations have been performed to determine selected stretching frequencies and chemical shieldings for ternary complexes N-base:PH2F:BeX2 the corresponding binary complexes, with NH3, H2C=NH, HCN as nitrogen bases H, F, Cl substituents X. Be-F P-F depend on distances, respectively, while P F N-P respectively. The graph of versus distance bears a remarkable resembla...