introduction: in cases of severe hard tissue loss, 2 mm circumferential ferrule is difficult to achieve. so in these cases we should use different ferrule designs. this in vitro study investigated the effect of different ferrule designs on the fracture resistance of teeth restored with bonded post and cores. materials and methods: forty freshly-extracted central incisors were endodontically tre...

In the title compound, [Co(2)(NCSe)(4)(C(4)H(4)N(2))(3)(CH(3)OH)(2)](n), the Co(II) ion is coordinated by three N-bonded pyrimidine ligands, two N-bonded seleno-cyanate anions and one O-bonded methanol mol-ecule in an octa-hedral coordination mode. The asymmetric unit consists of one Co(II) ion, one pyrimidine ligand, two seleno-cyanate anions and one methanol mol-ecule in general positions as ...

Hydrogen-Bonded Frameworks. A hydrogen-bonded framework that was predicted to have 3-D porosity has been discovered experimentally by Anna G. Slater, John W. Ward, Marc A. Little, Andrew I. Cooper et al. in their Research Article (e202303167). It is one of the most porous frameworks synthesized date.

In the crystal structure of the title compound, [Mn(NCSe)(2)(C(4)H(4)N(2))(2)(H(2)O)(2)], the manganese(II) cation is coordinated by two N-bonded pyrimidine ligands, two N-bonded seleno-cyanate anions and two O-bonded water mol-ecules in a distorted octa-hedral coordination mode. The asymmetric unit consists of one manganese(II) cation, located on a centre of inversion, as well as one seleno-cy...

In the previous paper 1 (hereafter referred to as I) the non-bonded interaction energies between the rigid fragments AH and BH were examined in some detail. Particular attention was given to the analysis of the various contributions to the interaction eneregy in the region of large non-bonded overlap.f In those calculations the position of the fragments with respect to one another was varied, k...