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(CN3H6)2·Zn4H5(PO4)5, a New Layered Guanidinium Zinc Phosphate Built Up from 3-, 4-, and 8-Ring Units

✍ Scribed by William T.A. Harrison; Mark L.F. Phillips; William Clegg; Simon J. Teat

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
225 KB
Volume
148
Category
Article
ISSN
0022-4596

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✦ Synopsis

The solution-mediated synthesis and single crystal structure of (CN 3 H 6 ) 2 ' Zn 4 H 5 (PO 4 ) 5 , a new guanidinium zinc phosphate, are described. The use of high-intensity synchrotron radiation was necessary to determine the correct unit cell for this phase. Unlike the previously described one-dimensional or three-dimensional guanidinium zinc phosphates, this material has a strongly layered nature. Vertex-linked ZnO 4 , HPO 4 , and H 2 PO 4 building units self-assemble into complex sheets containing polyhedral 3-rings, 4-rings, and 8-rings. The intersheet guanidinium cations provide charge compensation and interact with the layers via N+H2O hydrogen bonds. Crystal data: (CN 3 H 6 ) 2 ' Zn 4 H 5 (PO 4 ) 5 , M r ‫؍‬ 861.57, monoclinic, space group I 2/a (No. 15), a ‫؍‬ 23.770 (2) A > , b ‫؍‬ 5.1036 (5) A > , c ‫؍‬ 18.100 (2) A > , ‫؍‬ 94.491 (2)3, V ‫؍‬ 2189.0 (5) A > 3 , Z ‫؍‬ 4, R(F) ‫؍‬ 0.047, R w (F 2 ) ‫؍‬ 0.121 (2322 re6ections, 168 parameters).

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