catena-Poly[[[(oxamide dioxime-κ2N,N')copper(II)]-μ-L-tartrato-κ4O1,O2:O3,O4] tetrahydrate]: a chiral nanochannel framework hosting solvent water molecules

Acta Crystallographica. Section C, Crystal Structure Communications
Michel M BelombeAndreas Fischer

Abstract

The crystal structure of the title compound, {[Cu(C(4)H(4)O(6))(C(2)H(6)N(4)O(2))]·4H(2)O}(n), contains the central Cu(II) cation in a distorted octahedral coordination, symmetrically chelated by the two imine N atoms of a neutral oxamide dioxime (H(2)oxado) ligand [Cu-N = 1.9829 (16) Å] and unsymmetrically bis-chelated by two halves of the L-(+)-tartrate(2-) (tart) ligands, each half being linked to the Cu(II) cation via the deprotonated carboxylate group and protonated hydroxy group [Cu-O = 1.9356 (14) and 2.4674 (13) Å, respectively]. The extended asymmetric unit is defined by twofold axes, one passing through the Cu(II) cation and the centre of the oxamide dioxime (H(2)oxado) ligand and the another two (symmetry related) bisecting the central C-C bonds of the tartrate ions. The structure is chiral, consisting of enantiomeric linear-chain polymers oriented along [001], with virtual monomeric {Cu(tart(0.5))(2)(H(2)oxado)} repeat units and with the chains interleaved face-to-face into `twin pillars'. Nanochannels exist, running parallel to the c axis and bisecting a and b, which host `double strings' of solvent water molecules. Extensive hydrogen bonding (O-H···O and N-H···O) between the chains and solvent water molecules, tog...Continue Reading

References

Feb 6, 2002·Acta Crystallographica. Section C, Crystal Structure Communications·Sandra ScherbWolfgang Bensch
Oct 9, 2003·Acta Crystallographica. Section C, Crystal Structure Communications·Xiaofeng ZhangLicheng Sun
Dec 23, 2004·Angewandte Chemie·Akane Akutsu-SatoTakehiko Mori
Nov 25, 2005·Angewandte Chemie·Mark MascalJames Chisholm
Dec 25, 2007·Acta Crystallographica. Section A, Foundations of Crystallography·George M Sheldrick
Feb 18, 2010·Dalton Transactions : an International Journal of Inorganic Chemistry·Julia VallejoMiguel Julve
Jan 1, 2008·Acta Crystallographica. Section E, Structure Reports Online·Chunhua GeXiangdong Zhang
Jan 1, 2010·Acta Crystallographica. Section E, Structure Reports Online·Hou-Ting LiuDa-Qi Wang
Jan 1, 2008·Acta Crystallographica. Section E, Structure Reports Online·Michel M BelombeRichard Dronskowski
Jan 1, 2009·Acta Crystallographica. Section E, Structure Reports Online·Li-Zhen ZhaoSeik Weng Ng
Sep 15, 2011·Journal of the American Chemical Society·Emilio PardoMichel Verdaguer

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