Abstract
A hydrothermal reaction of a mixture of Y(NO3)3, 1,2-benzenedicarboxylic acid (1,2-BDC) and NaOH gives rise to a new yttrium phthalate coordination polymer, [Y4H2O2C8H4O4)6]∞,I. The Y ions inI are present in four different coordination environments with respect to the oxygen atoms (CN6 = octahedral, CN7 = pentagonal bipyramid, CN8 = dodecahedron and CN9 = capped square anti-prism). The oxygen atoms of the 1,2-BDC are fully deprotonated, and show variations in their connectivity with Y atoms. The Y atoms themselves are connected through their vertices forming infinite Y-O-Y one-dimensional chains. The Y-O-Ychains are cross-linked by the 1,2-BDC anions forming a corrugated layer structure. The layers are supported by favourableπ…π interactions between the benzene rings of the 1,2-BDC anions. The variations in the coordination environment of the Y atoms and the presence of Y-O-Y interactions along with the favourableπ…π interactions between the benzene rings from different layers are noteworthy structural features. Crystal data: triclinic, space group =P−1 (no. 2),a = 12.6669 (2),b = 13.8538 (2),c = 16.0289 Å,α = 75.20 (1),β = 69.012 (1),γ= 65.529 (1)°,V = 2371.28 (7) Å3,D calc = 1.922 g cm−1, μ(MoKα) = 4.943 mm−1. A total of 9745 reflections collected and merged to give 6566 unique reflections (R int = 0.0292) of which 5252 withI>2σ(I) were considered to be observed. FinalR 2 = 0.0339,wR 2 = 0.0724 andS = 1.036 were obtained for 704 parameters.
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Dedicated to Professor C N R Rao on his 70th birthday
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Thirumurugan, A., Natarajan, S. A two-dimensional yttrium phthalate coordination polymer, [Y4(H2O)2(C8H4O4)6]∞, exhibiting different coordination geometries. J Chem Sci 115, 573–586 (2003). https://doi.org/10.1007/BF02708249
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DOI: https://doi.org/10.1007/BF02708249