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

Representation of the PbII coordination environments observed in (I), (II), and (III). Symmetry identifiers are those used in Tables 1 ▶, 2 ▶ and 3 ▶.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig6: Representation of the PbII coordination environments observed in (I), (II), and (III). Symmetry identifiers are those used in Tables 1 ▶, 2 ▶ and 3 ▶.

Mentions: The coordination spheres are O6, O6N, O7, and O6N for Pb1, Pb2, Pb3, and Pb4, respectively, for (I), and O6N for (II) and (III). Representations of the coordination spheres are shown in Fig. 6 ▶ and pertinent bond distances are found in Tables 1 ▶, 2 ▶ and 3 ▶. The coordination is clearly hemidirected for each Pb and the Pb—O bond lengths are asymmetrical, as is often found for hemidirected compounds (Shimoni-Livny et al., 1998 ▶). The average Pb—O bond lengths are 2.60 (13), 2.59 (11), and 2.58 (12) Å for (I), (II) and (III), respectively, or 2.59 (12) Å overall, and range from 2.380 (6) to 2.901 (6) Å. The average Pb—N bond length for the three compounds is 2.84 (5) Å. In all cases, the Pb—O(N) bond lengths are longer for those ligand atoms adjacent to the open coordination site. This is consistent with structural results for other hemidirected coordination modes involving O- and N-donor atoms (cf. Shimoni-Livny et al., 1998 ▶; Morsali et al., 2005 ▶; Esteban-Gómez et al., 2006 ▶; Morsali, 2004 ▶).


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)

Representation of the PbII coordination environments observed in (I), (II), and (III). Symmetry identifiers are those used in Tables 1 ▶, 2 ▶ and 3 ▶.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig6: Representation of the PbII coordination environments observed in (I), (II), and (III). Symmetry identifiers are those used in Tables 1 ▶, 2 ▶ and 3 ▶.
Mentions: The coordination spheres are O6, O6N, O7, and O6N for Pb1, Pb2, Pb3, and Pb4, respectively, for (I), and O6N for (II) and (III). Representations of the coordination spheres are shown in Fig. 6 ▶ and pertinent bond distances are found in Tables 1 ▶, 2 ▶ and 3 ▶. The coordination is clearly hemidirected for each Pb and the Pb—O bond lengths are asymmetrical, as is often found for hemidirected compounds (Shimoni-Livny et al., 1998 ▶). The average Pb—O bond lengths are 2.60 (13), 2.59 (11), and 2.58 (12) Å for (I), (II) and (III), respectively, or 2.59 (12) Å overall, and range from 2.380 (6) to 2.901 (6) Å. The average Pb—N bond length for the three compounds is 2.84 (5) Å. In all cases, the Pb—O(N) bond lengths are longer for those ligand atoms adjacent to the open coordination site. This is consistent with structural results for other hemidirected coordination modes involving O- and N-donor atoms (cf. Shimoni-Livny et al., 1998 ▶; Morsali et al., 2005 ▶; Esteban-Gómez et al., 2006 ▶; Morsali, 2004 ▶).

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