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Preparation, Crystal Structure, Vibrational Spectra, and Thermal Behavior of Tl 2 H 2 P 2 O 6 and Tl 4 P 2 O 6
Author(s) -
Wu Peng,
Pook NielsPatrick,
Gjikaj Mimoza
Publication year - 2015
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.201500174
Subject(s) - monoclinic crystal system , orthorhombic crystal system , crystallography , thallium , crystal structure , raman spectroscopy , lone pair , chemistry , hydrogen bond , group (periodic table) , molecule , inorganic chemistry , physics , organic chemistry , optics
The new thallium(I) salts, Tl 2 H 2 P 2 O 6 ( 1 ) and Tl 4 P 2 O 6 ( 2 ), were prepared and structurally characterized by single‐crystal X‐ray diffraction. Compound 1 crystallizes in the monoclinic space group P 2 1 / c and compound 2 in the orthorhombic space group Pbca . Both structures feature channels occupied by the lone electron pairs of Tl + cations. Furthermore, those are built up by discrete [H 2 P 2 O 6 ] 2– for compound 1 and [P 2 O 6 ] 4– units for 2 in staggered conformation for the P 2 O 6 skeleton and the thallium cations. In Tl 2 H 2 P 2 O 6 ( 1 ) the hydrogen atoms of the [H 2 P 2 O 6 ] 2– ion are in a “ trans‐trans ” conformation. The O ··· H–O hydrogen bonds between the [H 2 P 2 O 6 ] 2– groups consolidate the structure 1 into a three‐dimensional network. FT‐IR/FIR and FT‐Raman spectra of the crystalline title compounds were recorded and a complete assignment for the P 2 O 6 4– modes is proposed. The phase purity of 1 was verified by powder diffraction measurements.