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Synthesis and Crystal Structure of Europium(II) Tartrate Tetrahydrate, [Eu(C 4 H 4 O 6 )(H 2 O) 2 ](H 2 O) 2
Author(s) -
Starynowicz Przemyslaw,
Meyer Gerd
Publication year - 2000
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 - 10.1002/1521-3749(200012)626:12<2441::aid-zaac2441>3.0.co;2-l
Subject(s) - orthorhombic crystal system , europium , tetrahydrate , carboxylate , chemistry , aqueous solution , crystallography , crystal structure , molecule , divalent , lanthanide , inorganic chemistry , stereochemistry , ion , organic chemistry
Single crystals of [Eu(C 4 H 4 O 6 )(H 2 O) 2 ](H 2 O) 2 were obtained from the combination of solutions of EuCl 2 , previously obtained by electrolysis of an aqueous solution of EuCl 3 , and tartraric acid, neutralized by LiOH. The crystal structure (orthorhombic, P2 1 2 1 2 1 , Z = 4, a = 948.9(1), b = 954.6(1), c = 1098.4(1) pm; R(F) = 0.0242 and R w (F 2 ) = 0.0585 for I > 2σ(I); R(F) = 0.0256 and R w (F 2 ) = 0.0592 for all data) is isotypic with [Ca(C 4 H 4 O 6 )(H 2 O) 2 ](H 2 O) 2 and [Sr(C 4 H 4 O 6 )(H 2 O) 2 ](H 2 O) 2 exhibiting a three‐dimensional structure. The divalent cations (Eu 2+ , Ca 2+ , Sr 2+ ) are eight‐coordinate by oxygen atoms that originate from carboxylate and hydroxyl groups of the tartraric dianion and two of the four water molecules.