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A two-dimensional Cd II coordination polymer: poly[di ­ aqua ­ [ μ 3 -5,6-bis ­ (pyridin-2-yl)pyrazine-2,3-di ­ carboxyl ­ ato- κ 5 O 2 : O 3 : O 3 , N 4 , N 5 ]cadmium]

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ABSTRACT

The reaction of 5,6-bis­(pyridin-2-yl)pyrazine-2,3-di­carb­oxy­lic acid with cadmium dichloride leads to the formation of the title two-dimensional coordination polymer, [Cd(C16H8N4O4)(H2O)2]n. The metal atom is sevenfold coordinated by one pyrazine and one pyridine N atom, two water O atoms, and by two carboxyl­ate O atoms, one of which bridges two CdII atoms to form a Cd2O2 unit situated about a centre of inversion. Hence, the ligand coordinates to the cadmium atom in an N,N′,O-tridentate and an O-monodentate manner. Within the polymer network, there are a number of O—H⋯O hydrogen bonds present, involving the water mol­ecules and the carboxyl­ate O atoms. There are also C—H⋯N and C—H⋯O hydrogen bonds present. In the crystal, the polymer networks lie parallel to the bc plane. They are aligned back-to-back along the a axis with the non-coordinating pyridine rings directed into the space between the networks.

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A view along the a axis of the title two-dimensional coordination polymer. The C-bound H atoms have been omitted for clarity.
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fig2: A view along the a axis of the title two-dimensional coordination polymer. The C-bound H atoms have been omitted for clarity.

Mentions: In the crystal, the two-dimensional polymer networks lie parallel to the bc plane, as illustrated in Figs. 2 ▸ and 3 ▸. The networks are aligned back-to-back along the a axis, with the non-coordinating pyridine rings directed into the space between the networks (Fig. 4 ▸). Within the networks there are a number of O—H⋯O hydrogen bonds present, involving the water mol­ecules and the carboxyl­ate O atoms (Table 2 ▸ and Fig. 5 ▸). There are also C—H⋯O and C—H⋯N hydrogen bonds present within the network (Table 2 ▸).


A two-dimensional Cd II coordination polymer: poly[di ­ aqua ­ [ μ 3 -5,6-bis ­ (pyridin-2-yl)pyrazine-2,3-di ­ carboxyl ­ ato- κ 5 O 2 : O 3 : O 3 , N 4 , N 5 ]cadmium]
A view along the a axis of the title two-dimensional coordination polymer. The C-bound H atoms have been omitted for clarity.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5120711&req=5

fig2: A view along the a axis of the title two-dimensional coordination polymer. The C-bound H atoms have been omitted for clarity.
Mentions: In the crystal, the two-dimensional polymer networks lie parallel to the bc plane, as illustrated in Figs. 2 ▸ and 3 ▸. The networks are aligned back-to-back along the a axis, with the non-coordinating pyridine rings directed into the space between the networks (Fig. 4 ▸). Within the networks there are a number of O—H⋯O hydrogen bonds present, involving the water mol­ecules and the carboxyl­ate O atoms (Table 2 ▸ and Fig. 5 ▸). There are also C—H⋯O and C—H⋯N hydrogen bonds present within the network (Table 2 ▸).

View Article: PubMed Central - HTML - PubMed

ABSTRACT

The reaction of 5,6-bis­(pyridin-2-yl)pyrazine-2,3-di­carb­oxy­lic acid with cadmium dichloride leads to the formation of the title two-dimensional coordination polymer, [Cd(C16H8N4O4)(H2O)2]n. The metal atom is sevenfold coordinated by one pyrazine and one pyridine N atom, two water O atoms, and by two carboxyl­ate O atoms, one of which bridges two CdII atoms to form a Cd2O2 unit situated about a centre of inversion. Hence, the ligand coordinates to the cadmium atom in an N,N′,O-tridentate and an O-monodentate manner. Within the polymer network, there are a number of O—H⋯O hydrogen bonds present, involving the water mol­ecules and the carboxyl­ate O atoms. There are also C—H⋯N and C—H⋯O hydrogen bonds present. In the crystal, the polymer networks lie parallel to the bc plane. They are aligned back-to-back along the a axis with the non-coordinating pyridine rings directed into the space between the networks.

No MeSH data available.


Related in: MedlinePlus