Combined charge and spin density experimental study of the yttrium(III) semiquinonato complex Y(HBPz3)2(DTBSQ) and DFT calculations

Article Abstract:

High-resolution X-ray diffraction and polarized neutron diffraction experiments is performed on the Y-semiquinonate complex, Y(HBPz3)2(DTBSQ), in order to determine the charge and spin densities in the paramagnetic ground state, S=1/2. The aim of these combined studies is to bring new insights to the antiferromagnetic coupling mechanism between the semiquinonate radical and the rare earth ion in the isomorphous Gd(HBPz3)2(DTBSQ) complex.

France, Molecular structure, Yttrium, Mechanical properties

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Crystallization of a polypropylene terpolymer made by a Ziegler-Natta catalyst: Formation of [gamma]-phase

Article Abstract:

A novel strategy is described for preparing a crystallized sample of a terpolymer containing a high content of the [gamma]-phase using a Ziegler-Natta catalyst. The large number of nuclei accounting for the structural disorder during crystallite formation is one of the main reasons for [gamma]-phase formation in the terpolymer crystallization.

Plastics Material and Resin Manufacturing, Plastics materials and resins, Polypropylene, Analysis, Optical properties, Crystallization, Calorimetry

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