Abstract
A novel ladder-chain cobalt(II) coordination polymer, {[Co3(C7H4ClO2)6(C10H8N2)4(H2O)2]·2CH3OH} n , was synthesized and characterized. The structure contains two CoII centres with different octa-hedral environments, [Co(1)N3O3] and [Co(2)N2O4]. The O-donating 3-chloro-benzoate anions (3-Clbenz) act as the terminal ligands, while the N-donating 4,4'-bipy mol-ecules play the role of linkers. The Co(1) ions are linked by 4,4'-bipy mol-ecules into linear chains. Two such chains are joined by [Co(2)(3-Clbenz)2(H2O)2] units via two 4,4'-bipy bridging ligands, thus forming the ladder-chain structure. The crystal packing of the title compound is stabilized by supra-molecular inter-actions, such as hydrogen bonding, π-π and halogen⋯π contacts, giving a three-dimensional framework. The spectroscopic and thermal properties of the title compound have also been investigated.
Highlights
A novel ladder-chain cobalt(II) coordination polymer, {[Co3(C7H4ClO2)6(C10H8N2)4(H2O)2]Á2CH3OH}n, was synthesized and characterized
The crystal packing of the title compound is stabilized by supramolecular interactions, such as hydrogen bonding, – and halogenÁ Á Á contacts, giving a three-dimensional framework
The exploration and synthesis of new one-dimensional coordination polymers based on transition metals and mixed Nand O-donating ligands such as 4,40-bipyridine (4,40-bipy) and benzoate derivatives have been intensively developed (Kaes et al, 2000; Saelim et al, 2020; Topor et al, 2021)
Summary
The exploration and synthesis of new one-dimensional coordination polymers based on transition metals and mixed Nand O-donating ligands such as 4,40-bipyridine (4,40-bipy) and benzoate derivatives have been intensively developed (Kaes et al, 2000; Saelim et al, 2020; Topor et al, 2021). The majority contain mixed 4,40-bipy and para-substituted benzoate derivatives, but there is a limited number of examples containing meta-substituent benzoate ligands (Fang & Nie, 2011; Kar et al, 2011; Xin-Jian et al, 2013; Lin, 2015). We employed 3-chlorobenzoate (3-Clbenz), which is expected to support crystal structures via – and halogenÁ Á Á intermolecular interactions, together with the 4,40-bipy organic linker and have synthesized the new CoII coordination polymer {[Co3(4,40-bipy)4(3-Clbenz)6(H2O)2]Á2CH3OH}n, which has an interesting one-dimensional ladder-chain structure. Symmetry codes: (i) Àx þ 1; Ày þ 2; Àz; (ii) x; y; z À 1; (iii) x; y À 1; z þ 1
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