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[15]Crown‐5: An Unsymmetrical Bifacial Hydrogen‐Bond Acceptor in Crystal Engineering
Author(s) -
Steed Jonathan W.,
Sakellariou Evelina,
Junk Peter C.,
Smith Matthew K.
Publication year - 2001
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/1521-3765(20010316)7:6<1240::aid-chem1240>3.0.co;2-v
Subject(s) - crown ether , crown (dentistry) , context (archaeology) , hydrogen bond , crystallography , chemistry , 15 crown 5 , molecule , crystal engineering , materials science , ion , organic chemistry , geology , composite material , paleontology
Reaction of [15]crown‐5 with erbium nitrate and a range of nickel salts results in the formation of the hydrogen‐bonded chain species [Er(NO 3 ) 3 (H 2 O) 3 ]⋅[15]crown‐5⋅H 2 O ( 3 ), [Ni(H 2 O) 6 ]Br 2 ⋅[15]crown‐5⋅2 H 2 O ( 4 ), [Ni(H 2 O) 6 ](ClO 4 ) 2 ⋅[15]crown‐5⋅2 H 2 O ( 5 ), [Ni(H 2 O) 6 ](NO 3 ) 2 ⋅[15]crown‐5⋅2 H 2 O ( 6 ) and [{Ni(H 2 O) 4 } 2 ( μ ‐Cl) 2 ]Cl 2 ⋅[15]crown‐5 ( 7 ). Complexes 3 – 5 exhibit low symmetry structures with 2–4 unique crown ether molecules, whereas 6 and 7 are more symmetrical. The factors contributing to this behaviour are discussed within the wider context of [15]crown‐5 structures in the Cambridge Structural Database.