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New 2D and 3D Coordination Polymers by Dehydration of 1 ∞ [ M II ( tF ‐BDC)(H 2 O) 4 ] ( M II = Zn 2+ , Co 2+ , Ni 2+ and tF ‐BDC 2– = Tetrafluoroterephthalate)
Author(s) -
Stastny Carina,
Dolfus Benedikt,
Brombach Christiane T.,
Dresen Dominique,
Disch Sabrina,
Glaum Robert,
Ruschewitz Uwe
Publication year - 2018
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.201800228
Subject(s) - coordination sphere , dehydration , crystallography , octahedron , anhydrous , chemistry , coordination number , cobalt , hydrate , homoleptic , coordination complex , crystal structure , lanthanide , inorganic chemistry , metal , ion , organic chemistry , biochemistry
By dehydration of the known coordination polymers 1 ∞ [ M II ( tF ‐BDC)(H 2 O) 4 ] ( M II = Co 2+ , Zn 2+ and tF ‐BDC 2– = tetrafluoroterephthalate) the homoleptic anhydrous coordination networks 3 ∞ [M II ( tF ‐BDC)] were obtained as polycrystalline powders. Their crystal structures ( C 2/ c, Z = 4) were solved and refined by means of synchrotron powder diffraction data. These structures are characterized by [ M II O 4 ] tetrahedra, which are connected by the tF ‐BDC 2– linkers to form a 3D non‐porous coordination network. The dehydration leads to a change from a [ M II O 6 ] octahedral coordination in the hydrate to a tetrahedral coordination sphere in the anhydrous compound. For the cobalt compounds this leads to a color change from pale rose to deep blue upon heating and dehydration, which was analyzed by means of UV/Vis/NIR spectroscopy and measurements of the magnetic susceptibilities. In contrast, 1 ∞ [Ni II ( tF ‐BDC)(H 2 O) 4 ] can only partly be dehydrated to form 2 ∞ [Ni II ( tF ‐BDC)(H 2 O) 2 ] ( P 1 , Z = 1) with retention of the octahedral [Ni II O 6 ] coordination in both compounds. At higher temperatures the tF ‐BDC 2– linker starts to decompose, before a complete dehydration can take place.