Crystal structures and Raman spectra of Cu(OH)F and Cu3(OH)2F4

Verfasser / Beitragende:
[G. Giester, E. Libowitzky]
Ort, Verlag, Jahr:
2003
Enthalten in:
Zeitschrift für Kristallographie - Crystalline Materials, 218/5(2003-05-01), 351-356
Format:
Artikel (online)
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024 7 0 |a 10.1524/zkri.218.5.351.20735  |2 doi 
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245 0 0 |a Crystal structures and Raman spectra of Cu(OH)F and Cu3(OH)2F4  |h [Elektronische Daten]  |c [G. Giester, E. Libowitzky] 
520 3 |a Crystals of Cu(OH)F and Cu3(OH)2F4 have been synthesized at low-hydrothermal conditions in sizes up to 0.3 mm. The structures were solved from CCD X-ray single-crystal data and refined to R = 0.033 and 0.019, respectively. Cu(OH)F: space group P21/a, Z = 4, a = 5.301(1) Å, b = 6.376(1) Å, c = 5.074(1) Å, β = 112.90(1)°, and V = 157.98(5) Å3. Cu3(OH)2F4: space group P21/n, Z = 2, a = 5.501(1) Å, b = 4.766(1) Å, c = 8.462(1) Å, β = 92.28(1)°, and V = 221.68(7) Å3. In both compounds the copper atoms are 4 + 2 coordinated to their ligands (Jahn-Teller distortion). Cu(OH)F is isotypic to Cu(OH)Cl, forming layers of edge-sharing Cu(OH)3F3 polyhedra, which are interconnected by hydrogen bonds. The structure of Cu3(OH)2F4 is characterized by chains of edge-sharing Cu(OH)2F4 polyhedra running along [1 0 0], which are linked to each other via corners to form a framework. Hydrogen bonds of the type O—H···F occur with O···F distances of 2.619 and 2.697 Å in Cu(OH)Fand Cu3(OH)2F4, respectively. The observed O—H stretching frequencies of 3129 and 3306 cm-1, respectively, in Raman spectra are in excellent agreement with expected values from distance — frequency correlations. Moreover, the pleochroism of the bands corresponds in both compounds to the O—H orientation found in the structure determination. 
540 |a © 2003 Oldenbourg Wissenschaftsverlag GmbH 
690 7 |a Crystallography  |2 nationallicence 
690 7 |a Inorganic chemistry  |2 nationallicence 
690 7 |a Organic chemistry  |2 nationallicence 
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