Influence of the alkali cation size on the Cu 2+ coordination environments in ( AX )[Cu(HSeO 3 ) 2 ] ( A =Na, K, NH 4 , Rb, Cs; X =Cl, Br) layered copper hydrogen selenite halides - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Zeitschrift für Kristallographie - Crystalline Materials Année : 2019

Influence of the alkali cation size on the Cu 2+ coordination environments in ( AX )[Cu(HSeO 3 ) 2 ] ( A =Na, K, NH 4 , Rb, Cs; X =Cl, Br) layered copper hydrogen selenite halides

Résumé

Abstract Using solution evaporation techniques, we succeeded in preparation of new members essentially extending the layered copper hydrogen selenite family, ( AX )[Cu(HSeO 3 ) 2 ] with A = Na, K, Rb, Cs, and NH 4 , and X = Cl and Br. Bromides and chlorides are isostructural in the family of described new compounds crystallizing in three different structure types. (Na X )[Cu(HSeO 3 ) 2 ] and (K X )[Cu(HSeO 3 ) 2 ] ( X = Cl, Br) are monoclinic, whereas ( AX )[Cu(HSeO 3 ) 2 ] ( A = NH 4 , Rb, Cs; X = Cl, Br) are orthorhombic. Upon the enlargement of the A + ionic radii inserted in the interlayer between the neighboring [Cu(HSeO 3 ) 2 ] slabs, the effective distance is increasing and results in essential elongation of the apical Cu- X ( X = Cl, Br) distances. Three different types of CuO 4 X n ( n = 0–2) polyhedra are formed. The observed trend is an interesting example of the chemical tuning of the Cu 2+ coordination environments.
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Dates et versions

hal-03668527 , version 1 (15-05-2022)

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Citer

Dmitri Charkin, Mishel Markovski, Oleg Siidra, Diana Nekrasova, Vasili Yu. Grishayev. Influence of the alkali cation size on the Cu 2+ coordination environments in ( AX )[Cu(HSeO 3 ) 2 ] ( A =Na, K, NH 4 , Rb, Cs; X =Cl, Br) layered copper hydrogen selenite halides. Zeitschrift für Kristallographie - Crystalline Materials, 2019, 234 (11-12), pp.739-747. ⟨10.1515/zkri-2019-0042⟩. ⟨hal-03668527⟩
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