Limits...
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.

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

The atom-labeling scheme for (III). Anisotropic displacement parameters are drawn at the 50% probability level. [Symmetry identifiers: (i) −x + 1, −y, −z + 1; (ii) −x + 2, −y, −z + 1.]
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4257386&req=5

fig5: The atom-labeling scheme for (III). Anisotropic displacement parameters are drawn at the 50% probability level. [Symmetry identifiers: (i) −x + 1, −y, −z + 1; (ii) −x + 2, −y, −z + 1.]

Mentions: (II) and (III) are isotypic if the nitrile function in (III) is considered as a large one-atomic group and replaces the Cl atom in (II). Fig. 4 ▶ shows the atom-labeling scheme for (II) and Fig. 5 ▶ shows the atom-labeling scheme for (III). Each Pb atom has two bidentate acetate ligands, one of type (a) and one of type (b). The type (b) ligands result in chains parallel to [100], with Pb2O2 cores related by inversion centers. The substituted benzene-1,2-di­amine ligands are essentially planar. For (II), N1 and N2 are below the plane by 0.056 (14) and 0.066 (18) Å, respectively, and Cl1 is 0.020 (14) Å above the plane. In (III), N1 and N2 are 0.073 (17) and 0.05 (2) Å out of the plane. The C7—N3—C4 angle is 177.7 (16)° and N3 is 0.12 (2) Å out of the plane.


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)

The atom-labeling scheme for (III). Anisotropic displacement parameters are drawn at the 50% probability level. [Symmetry identifiers: (i) −x + 1, −y, −z + 1; (ii) −x + 2, −y, −z + 1.]
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig5: The atom-labeling scheme for (III). Anisotropic displacement parameters are drawn at the 50% probability level. [Symmetry identifiers: (i) −x + 1, −y, −z + 1; (ii) −x + 2, −y, −z + 1.]
Mentions: (II) and (III) are isotypic if the nitrile function in (III) is considered as a large one-atomic group and replaces the Cl atom in (II). Fig. 4 ▶ shows the atom-labeling scheme for (II) and Fig. 5 ▶ shows the atom-labeling scheme for (III). Each Pb atom has two bidentate acetate ligands, one of type (a) and one of type (b). The type (b) ligands result in chains parallel to [100], with Pb2O2 cores related by inversion centers. The substituted benzene-1,2-di­amine ligands are essentially planar. For (II), N1 and N2 are below the plane by 0.056 (14) and 0.066 (18) Å, respectively, and Cl1 is 0.020 (14) Å above the plane. In (III), N1 and N2 are 0.073 (17) and 0.05 (2) Å out of the plane. The C7—N3—C4 angle is 177.7 (16)° and N3 is 0.12 (2) Å out of the plane.

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