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Synthesis and Structural Characterization of a Metal Cluster and a Coordination Polymer Based on the [Mn(6)(mu(4)-O)(2)] Unit.

Moushi EE, Tasiopoulos AJ, Manos MJ - Bioinorg Chem Appl (2010)

Bottom Line: A new 1-D coordination polymer {[Mn(6)O(2)(O(2)CMe)(10)(H(2)O)(4)].2.5H(2)O}(infinity) (1.2.5H(2)O)(infinity) and the cluster [Mn(6)O(2)(O(2)(O(2)CPh)(10) (py)(2)(MeCN)(H(2)O)].2MeCN (2.2MeCN) are reported.Both compounds were synthesized by room temperature reactions of [Mn(3)(mu(3)-O)(O(2)CR)(6)(L)(2)(L')] (R = Me, L = L' = py, (1.2.5H(2)O)(infinity); R = Ph, L = py, L' = H(2)O, 2.2MeCN) in the presence of 3-hydroxymethylpyridine (3hmpH) in acetonitrile.The structures of these complexes are based on hexanuclear mixed-valent manganese carboxylate clusters containing the [Mn(4) (II)Mn(2) (III)(mu(4)-O)(2)](10+) structural core. (1.2.5H(2)O)(infinity) consists of zigzag chain polymers constructed from [Mn(6)O(2)(O(2)CMe)(10)(H(2)O)(4)] repeating units linked through acetate ligands, whereas 2.2MeCN comprises a discrete Mn(6)-benzoate cluster.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, University of Cyprus, 1678 Nicosia, Cyprus.

ABSTRACT
A new 1-D coordination polymer {[Mn(6)O(2)(O(2)CMe)(10)(H(2)O)(4)].2.5H(2)O}(infinity) (1.2.5H(2)O)(infinity) and the cluster [Mn(6)O(2)(O(2)(O(2)CPh)(10) (py)(2)(MeCN)(H(2)O)].2MeCN (2.2MeCN) are reported. Both compounds were synthesized by room temperature reactions of [Mn(3)(mu(3)-O)(O(2)CR)(6)(L)(2)(L')] (R = Me, L = L' = py, (1.2.5H(2)O)(infinity); R = Ph, L = py, L' = H(2)O, 2.2MeCN) in the presence of 3-hydroxymethylpyridine (3hmpH) in acetonitrile. The structures of these complexes are based on hexanuclear mixed-valent manganese carboxylate clusters containing the [Mn(4) (II)Mn(2) (III)(mu(4)-O)(2)](10+) structural core. (1.2.5H(2)O)(infinity) consists of zigzag chain polymers constructed from [Mn(6)O(2)(O(2)CMe)(10)(H(2)O)(4)] repeating units linked through acetate ligands, whereas 2.2MeCN comprises a discrete Mn(6)-benzoate cluster.

No MeSH data available.


Wireframe representation of the layer formed by interchain hydrogen bonds in (1)∞. The hydrogen bonds are shown as dotted blue lines. Mn, green; O, red; C, grey. H atoms are omitted for clarity.
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fig3: Wireframe representation of the layer formed by interchain hydrogen bonds in (1)∞. The hydrogen bonds are shown as dotted blue lines. Mn, green; O, red; C, grey. H atoms are omitted for clarity.

Mentions: All Mn atoms are in distorted octahedral geometries. Five of the intra-cluster acetate groups are μ2 with each of their carboxylate oxygen atoms acting as terminal ligand for a Mn center. Four acetate ligands are coordinated in η1 : η2 : μ3 fashion. The remaining carboxylate ligand bridges two MnII atoms (Mn⋯Mn distance = 4.7914(2) Å) of adjacent Mn6 clusters, thus resulting in the formation of a zigzag chain structure (Figure 2). The chains are interacting through hydrogen bonds (O⋯O distances 2.7−2.9 Å) involving the coordinated water molecules and carboxylate O atoms. Thus, a two-dimensional hydrogen-bonded polymer with a 4-connected topology is formed (Figure 3). The hydrogen bonds involving the lattice water molecules cannot be identified with accuracy due to the positional disorder of these molecules and thus, are not discussed here.


Synthesis and Structural Characterization of a Metal Cluster and a Coordination Polymer Based on the [Mn(6)(mu(4)-O)(2)] Unit.

Moushi EE, Tasiopoulos AJ, Manos MJ - Bioinorg Chem Appl (2010)

Wireframe representation of the layer formed by interchain hydrogen bonds in (1)∞. The hydrogen bonds are shown as dotted blue lines. Mn, green; O, red; C, grey. H atoms are omitted for clarity.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2902058&req=5

fig3: Wireframe representation of the layer formed by interchain hydrogen bonds in (1)∞. The hydrogen bonds are shown as dotted blue lines. Mn, green; O, red; C, grey. H atoms are omitted for clarity.
Mentions: All Mn atoms are in distorted octahedral geometries. Five of the intra-cluster acetate groups are μ2 with each of their carboxylate oxygen atoms acting as terminal ligand for a Mn center. Four acetate ligands are coordinated in η1 : η2 : μ3 fashion. The remaining carboxylate ligand bridges two MnII atoms (Mn⋯Mn distance = 4.7914(2) Å) of adjacent Mn6 clusters, thus resulting in the formation of a zigzag chain structure (Figure 2). The chains are interacting through hydrogen bonds (O⋯O distances 2.7−2.9 Å) involving the coordinated water molecules and carboxylate O atoms. Thus, a two-dimensional hydrogen-bonded polymer with a 4-connected topology is formed (Figure 3). The hydrogen bonds involving the lattice water molecules cannot be identified with accuracy due to the positional disorder of these molecules and thus, are not discussed here.

Bottom Line: A new 1-D coordination polymer {[Mn(6)O(2)(O(2)CMe)(10)(H(2)O)(4)].2.5H(2)O}(infinity) (1.2.5H(2)O)(infinity) and the cluster [Mn(6)O(2)(O(2)(O(2)CPh)(10) (py)(2)(MeCN)(H(2)O)].2MeCN (2.2MeCN) are reported.Both compounds were synthesized by room temperature reactions of [Mn(3)(mu(3)-O)(O(2)CR)(6)(L)(2)(L')] (R = Me, L = L' = py, (1.2.5H(2)O)(infinity); R = Ph, L = py, L' = H(2)O, 2.2MeCN) in the presence of 3-hydroxymethylpyridine (3hmpH) in acetonitrile.The structures of these complexes are based on hexanuclear mixed-valent manganese carboxylate clusters containing the [Mn(4) (II)Mn(2) (III)(mu(4)-O)(2)](10+) structural core. (1.2.5H(2)O)(infinity) consists of zigzag chain polymers constructed from [Mn(6)O(2)(O(2)CMe)(10)(H(2)O)(4)] repeating units linked through acetate ligands, whereas 2.2MeCN comprises a discrete Mn(6)-benzoate cluster.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, University of Cyprus, 1678 Nicosia, Cyprus.

ABSTRACT
A new 1-D coordination polymer {[Mn(6)O(2)(O(2)CMe)(10)(H(2)O)(4)].2.5H(2)O}(infinity) (1.2.5H(2)O)(infinity) and the cluster [Mn(6)O(2)(O(2)(O(2)CPh)(10) (py)(2)(MeCN)(H(2)O)].2MeCN (2.2MeCN) are reported. Both compounds were synthesized by room temperature reactions of [Mn(3)(mu(3)-O)(O(2)CR)(6)(L)(2)(L')] (R = Me, L = L' = py, (1.2.5H(2)O)(infinity); R = Ph, L = py, L' = H(2)O, 2.2MeCN) in the presence of 3-hydroxymethylpyridine (3hmpH) in acetonitrile. The structures of these complexes are based on hexanuclear mixed-valent manganese carboxylate clusters containing the [Mn(4) (II)Mn(2) (III)(mu(4)-O)(2)](10+) structural core. (1.2.5H(2)O)(infinity) consists of zigzag chain polymers constructed from [Mn(6)O(2)(O(2)CMe)(10)(H(2)O)(4)] repeating units linked through acetate ligands, whereas 2.2MeCN comprises a discrete Mn(6)-benzoate cluster.

No MeSH data available.