title: In situ single-crystal to single-crystal (SCSC) transformation of the one-dimensional polymer catena-poly[[diaqua(sulfato)copper(II)]-μ₂-glycine] into the two-dimensional polymer poly[μ₂-glycine-μ₄-sulfato-copper(II)].
abstract: The one-dimensional coordination polymer catena-poly[diaqua(sulfato-κO)copper(II)]-μ2-glycine-κ(2)O:O'], [Cu(SO4)(C2H5NO2)(H2O)2]n, (I), was synthesized by slow evaporation under vacuum of a saturated aqueous equimolar mixture of copper(II) sulfate and glycine. On heating the same blue crystal of this complex to 435 K in an oven, its aspect changed to a very pale blue and crystal structure analysis indicated that it had transformed into the two-dimensional coordination polymer poly[(μ2-glycine-κ(2)O:O')(μ4-sulfato-κ(4)O:O':O'':O'')copper(II)], [Cu(SO4)(C2H5NO2)]n, (II). In (I), the Cu(II) cation has a pentacoordinate square-pyramidal coordination environment. It is coordinated by two water molecules and two O atoms of bridging glycine carboxylate groups in the basal plane, and by a sulfate O atom in the apical position. In complex (II), the Cu(II) cation has an octahedral coordination environment. It is coordinated by four sulfate O atoms, one of which bridges two Cu(II) cations, and two O atoms of bridging glycine carboxylate groups. In the crystal structure of (I), the one-dimensional polymers, extending along [001], are linked via N-H···O, O-H···O and bifurcated N-H···O,O hydrogen bonds, forming a three-dimensional framework. In the crystal structure of (II), the two-dimensional networks are linked via bifurcated N-H···O,O hydrogen bonds involving the sulfate O atoms, forming a three-dimensional framework. In the crystal structures of both compounds, there are C-H···O hydrogen bonds present, which reinforce the three-dimensional frameworks.
authors.affiliation: Institute of Physics, University of Neuchâtel, rue Emile-Argand 11, CH-2000 Neuchâtel, Switzerland.
authors.forename: Helen
authors.initials: H
authors.lastname: Stoeckli-Evans
authors.affiliation: XRD Application Laboratory, Microsystems Technology, Swiss Center for Electronics and Microelectronics, rue Jaquet-Droz 1, CH-2001 Neuchâtel, Switzerland.
authors.forename: Olha
authors.initials: O
authors.lastname: Sereda
authors.affiliation: XRD Application Laboratory, Microsystems Technology, Swiss Center for Electronics and Microelectronics, rue Jaquet-Droz 1, CH-2001 Neuchâtel, Switzerland.
authors.forename: Antonia
authors.initials: A
authors.lastname: Neels
authors.affiliation: Pancosma SA, Voie-des-Traz 6, CH-1218 Le Grand Saconnex (Geneva), Switzerland.
authors.forename: Sebastien
authors.initials: S
authors.lastname: Oguey
authors.affiliation: Pancosma SA, Voie-des-Traz 6, CH-1218 Le Grand Saconnex (Geneva), Switzerland.
authors.forename: Catherine
authors.initials: C
authors.lastname: Ionescu
authors.affiliation: Pancosma SA, Voie-des-Traz 6, CH-1218 Le Grand Saconnex (Geneva), Switzerland.
authors.forename: Yvan
authors.initials: Y
authors.lastname: Jacquier
mesh_terms: D056831:Coordination Complexes / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D015394:Molecular Structure
chemical_list: D056831:Coordination Complexes; C000596812:catena-poly((diaqua(sulfato)copper(II))-mu2-glycine); D003300:Copper
keywords: SCSC transformations; bioavailability; copper(II); crystal structure; crystal-to-crystal transformation; glycine; one-dimensional coordination polymers; pentacoordinate; solid-state transformation; sulfate; trace minerals; two-dimensional coordination polymers; variable temperature