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Pb 5 I 2 P 28 , $^{1}_{\infty}\rm [PbP_{14}]{\rm ^{2-}}$ Strands Coordinated to a Unique [Pb 3 I 2 ] 4+ Unit
Author(s) -
Bawohl Melanie,
Nilges Tom
Publication year - 2009
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200801285
Subject(s) - crystallography , substructure , crystal structure , stacking , structure type , materials science , chemistry , physics , combinatorics , mathematics , nuclear magnetic resonance , structural engineering , engineering
Pb 5 I 2 P 28 is the first compound containing a former unseen [P 3 I 2 ] 4+ unit, connecting two crystallographically independent adjacent [PbP 14 ] 2− polyphosphide strands. The polyanion substructure is closely related to the one realized in the HgPbP 14 structure type, with a homo‐nuclear coordination of the cations to the polyanions. It has been prepared by using the mineralizator concept for polyphosphides from the elements and PbI 2 as the mineralizator species. The new polyphosphide has a pronounced tendency to form easy cleavable, needle shaped crystals featuring massive stacking vaults. Nevertheless, a single crystal structure determination was possible from inter‐grown crystals. Pb 5 I 2 P 28 crystallizes monoclinically in the space group P 2 1 / n (No. 14) with lattice parameters of a = 9.792(2), b = 17.717(2), c = 19.191(3) Å, β = 96.39(1)°, V = 3308.6(8) Å 3 . Depending on the preparation route, the aspect ratio of the needle shaped crystals can be varied.