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Crystal structures of three lead(II) acetate-bridged di-amino-benzene coordination polymers.

Geiger DK, Parsons DE, Zick PL - Acta Crystallogr Sect E Struct Rep Online (2014)

Bottom Line: Chains along [010] are joined by bridging acetate ligands to form planes parallel to (10-1). (II) and (III) are isotypic and have one Pb(II) ion in the asymmetric unit that has an O6N coordination sphere.Polymeric chains parallel to [100] exhibit hydrogen bonding between the amine and acetate ligands.In (III), additional hydrogen bonds between cyano groups and non-coordinating amines join the chains by forming R 2 (2)(14) rings.

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Affiliation: Department of Chemistry, SUNY-College at Geneseo, Geneseo, NY 14454, USA.

ABSTRACT
Poly[tris-(acetato-κ(2) O,O')(μ2-acetato-κ(3) O,O':O)tetra-kis-(μ3-acetato-κ(4) O,O':O:O')bis-(benzene-1,2-di-amine-κN)tetra-lead(II)], [Pb4(CH3COO)8(C6H8N2)2] n , (I), poly[(acetato-κ(2) O,O')(μ3-acetato-κ(4) O,O':O:O')(4-chloro-benzene-1,2-diamine-κN)lead(II)], [Pb(CH3COO)2(C6H7ClN2)] n , (II), and poly[(κ(2) O,O')(μ3-acetato-κ(4) O,O':O:O')(3,4-di-amino-benzo-nitrile-κN)lead(II)], [Pb(CH3COO)2(C7H7N3)] n , (III), have polymeric structures in which monomeric units are joined by bridging acetate ligands. All of the Pb(II) ions exhibit hemidirected coordination. The repeating unit in (I) is composed of four Pb(II) ions having O6, O6N, O7 and O6N coordination spheres, respectively, where N represents a monodentate benzene-1,2-di-amine ligand and O acetate O atoms. Chains along [010] are joined by bridging acetate ligands to form planes parallel to (10-1). (II) and (III) are isotypic and have one Pb(II) ion in the asymmetric unit that has an O6N coordination sphere. Pb2O2 units result from a symmetry-imposed inversion center. Polymeric chains parallel to [100] exhibit hydrogen bonding between the amine and acetate ligands. In (III), additional hydrogen bonds between cyano groups and non-coordinating amines join the chains by forming R 2 (2)(14) rings.

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A view of (I) in which the two halves of the asymmetric unit related by the pseudo-translation are color coded. H atoms have been omitted for clarity.
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fig3: A view of (I) in which the two halves of the asymmetric unit related by the pseudo-translation are color coded. H atoms have been omitted for clarity.

Mentions: The asymmetric unit of (I) possesses pseudo-translational symmetry as a result of the similarity in the coordination geometries exhibited by Pb1 and Pb3 and by Pb2 and Pb4. Pb1⋯Pb3 = 7.4548 (10) Å and Pb2⋯Pb4 = 7.5372 (10) Å, approximately half of the Pb1⋯Pb4i = 14.989 (2) Å distance (see Table 1 ▶ for symmetry codes). Fig. 3 ▶ shows a representation of (I) in which the two pseudo-translationally related halves of the asymmetric unit are color coded. Primary differences in the two halves involve the orientation of the two non-coordinating amine groups, one less acetate type (c) on Pb1 than on Pb3, and a type (c) acetate ligand on Pb2 replaced by a type (a) acetate ligand on Pb4.


Crystal structures of three lead(II) acetate-bridged di-amino-benzene coordination polymers.

Geiger DK, Parsons DE, Zick PL - Acta Crystallogr Sect E Struct Rep Online (2014)

A view of (I) in which the two halves of the asymmetric unit related by the pseudo-translation are color coded. H atoms have been omitted for clarity.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4257386&req=5

fig3: A view of (I) in which the two halves of the asymmetric unit related by the pseudo-translation are color coded. H atoms have been omitted for clarity.
Mentions: The asymmetric unit of (I) possesses pseudo-translational symmetry as a result of the similarity in the coordination geometries exhibited by Pb1 and Pb3 and by Pb2 and Pb4. Pb1⋯Pb3 = 7.4548 (10) Å and Pb2⋯Pb4 = 7.5372 (10) Å, approximately half of the Pb1⋯Pb4i = 14.989 (2) Å distance (see Table 1 ▶ for symmetry codes). Fig. 3 ▶ shows a representation of (I) in which the two pseudo-translationally related halves of the asymmetric unit are color coded. Primary differences in the two halves involve the orientation of the two non-coordinating amine groups, one less acetate type (c) on Pb1 than on Pb3, and a type (c) acetate ligand on Pb2 replaced by a type (a) acetate ligand on Pb4.

Bottom Line: Chains along [010] are joined by bridging acetate ligands to form planes parallel to (10-1). (II) and (III) are isotypic and have one Pb(II) ion in the asymmetric unit that has an O6N coordination sphere.Polymeric chains parallel to [100] exhibit hydrogen bonding between the amine and acetate ligands.In (III), additional hydrogen bonds between cyano groups and non-coordinating amines join the chains by forming R 2 (2)(14) rings.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Chemistry, SUNY-College at Geneseo, Geneseo, NY 14454, USA.

ABSTRACT
Poly[tris-(acetato-κ(2) O,O')(μ2-acetato-κ(3) O,O':O)tetra-kis-(μ3-acetato-κ(4) O,O':O:O')bis-(benzene-1,2-di-amine-κN)tetra-lead(II)], [Pb4(CH3COO)8(C6H8N2)2] n , (I), poly[(acetato-κ(2) O,O')(μ3-acetato-κ(4) O,O':O:O')(4-chloro-benzene-1,2-diamine-κN)lead(II)], [Pb(CH3COO)2(C6H7ClN2)] n , (II), and poly[(κ(2) O,O')(μ3-acetato-κ(4) O,O':O:O')(3,4-di-amino-benzo-nitrile-κN)lead(II)], [Pb(CH3COO)2(C7H7N3)] n , (III), have polymeric structures in which monomeric units are joined by bridging acetate ligands. All of the Pb(II) ions exhibit hemidirected coordination. The repeating unit in (I) is composed of four Pb(II) ions having O6, O6N, O7 and O6N coordination spheres, respectively, where N represents a monodentate benzene-1,2-di-amine ligand and O acetate O atoms. Chains along [010] are joined by bridging acetate ligands to form planes parallel to (10-1). (II) and (III) are isotypic and have one Pb(II) ion in the asymmetric unit that has an O6N coordination sphere. Pb2O2 units result from a symmetry-imposed inversion center. Polymeric chains parallel to [100] exhibit hydrogen bonding between the amine and acetate ligands. In (III), additional hydrogen bonds between cyano groups and non-coordinating amines join the chains by forming R 2 (2)(14) rings.

No MeSH data available.


Related in: MedlinePlus