ISSN:
0025-116X
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Some adducts of MgCl2 and Lewis bases (or donors) B were examined, having a composition MgCl2 · 2B, where B = Ethyl (Et) formate, Et acetate, Et propionate, Et benzoate, Et crotonate, acetone, 2-butanone and EtOH. The crystallographic investigation of these adducts, carried out on polycrystalline powders and some single crystals, shows some remarkable structural analogies for all examined donors. In particular, the X-ray diffraction patterns of the adducts indicate the total absence of the close-packing of chlorine which characterizes α-MgCl2 and the presence of covalent Cl-Mg-Cl chains. The obtained data are correlated with the preparation of active supports for Ziegler-Natta olefin polymerization: after total elimination of B, a disordered structure of MgCl2 is obtained, which is coincident with the reported one for the mechanically activated (by ball-milling) MgCl2 and previously described both in the scientific and in the patent literature.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1992.021930112
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