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Further Insights into the Role of Temperature in the Synthesis of the Lanthanide(III)‐Pyrazine‐Octacyanotungstate(V) System: an Example of Discrete Materials
Author(s) -
Zhou Hu,
Diao GuoWang,
Yang XiaoZhen,
Yuan AiHua,
Zhang Min,
Sun Jing
Publication year - 2013
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.201300070
Subject(s) - pyrazine , lanthanide , tetramer , crystallography , supramolecular chemistry , chemistry , moiety , hydrogen bond , crystal structure , ion , single crystal , stereochemistry , molecule , organic chemistry , enzyme
Slow diffusion reactions of Ln 3+ (Ln = Ce, Eu, Tb) ions, pyrazine, and the [W(CN) 8 ] 3– unit at 0 °C produced three discrete coordination compounds [Ln(H 2 O) 5 (CH 3 CN) 2 ][W(CN) 8 ] · 0.5pyrazine · CH 3 CN · 2H 2 O [Ln = Ce ( 1 ), Eu ( 2 )] and [Tb(H 2 O) 6 (CH 3 CN) 2 ][W(CN) 8 ] · pyrazine · 2CH 3 CN · 3H 2 O ( 3 ). Single crystal X‐ray diffraction analysis revealed that compounds 1 and 2 are isomorphous and adopt a rare centrosymmetric tetranuclear square unit, while compound 3 exhibits an ion‐pair moiety, in which unique tetramer water clusters (H 2 O) 4 are involved. The presence of different types of hydrogen‐bonding interactions is responsible for the formation of three‐dimensional supramolecular networks. The isolations of compounds 1 – 3 provide a further insight into the effect of temperatures on constructions and structures of the lanthanide(III)‐pyrazine‐octacyanotungstate(V) system.