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Supramolecular Hydrogen‐Bonded Frameworks from a New Bisphosphonic Acid and Transition Metal Ions
Author(s) -
Gholivand Khodayar,
Reza Farrokhi Ali
Publication year - 2011
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.201000280
Subject(s) - supramolecular chemistry , hydrogen bond , chemistry , cobalt , nickel , ligand (biochemistry) , phosphonate , crystal structure , crystallography , cadmium acetate , inorganic chemistry , chloride , cadmium , molecule , organic chemistry , biochemistry , receptor
The reaction of 2‐morpholinoethylimino‐bis(methylenephosphonic acid) (H 4 L) with cobalt(II), nickel(II) acetate, and cadmium(II) chloride in ethanol/water mixed solvents afforded three new crystal‐engineered supramolecular metal phosphonates, Co(H 3 L) 2 · 2H 2 O ( 1 ), Ni(H 3 L) 2 · 2H 2 O ( 2 ), and [Cd 2 Cl 4 (H 2 O) 6 ] 0.5 [H 4 L] ( 3 ) by using a layering technique. The cobalt(II) ions in complex 1 are hexacoordinated by four phosphonate oxygen atoms and two imino nitrogen atoms. The mononuclear units of complex 1 are connected through hydrogen bonds to form a three dimensional supramolecular network. The structure of compound 2 is analogous to that of 1 except that the cobalt(II) ion in compound 1 is replaced by nickel(II) in compound 2 . In the molecular structure of compound 3 , cadmium is coordinated to three chloride ions and three aqua oxygen atoms to form a novel neutral dinuclear complex. Several hydrogen bonds connect the dinuclear complex and the neutral form of the ligand to build a supramolecular three dimensional structure.