Naslov
Self‐assembly of cobalt(II) coordination polymers with differently halosubstituted nicotinate ligands and 4,4’‐bipyridine – the effect of the halosubstituent positions on polymer types

Autori
Hok, Lucija ; Lluch Sanchez, Eloi ; Vianello, Robert ; Kukovec, Boris-Marko ; Popović, Zora

Izvornik
European journal of inorganic chemistry (1434-1948) 2021 (2021), 15; 1470-1480

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
cobalt ; halosubstituted nicotinate ; coordination polymer ; crystal structure ; DFT calculations

Sažetak
Two structurally different 1D cobalt(II) coordination polymers with 4, 4’‐bipyridine (4, 4’‐bpy) and 2‐chloronicotinate (2‐Cl‐nic) or 5‐ bromonicotinate (5‐Br‐nic), namely {; ; ; ; [Co(2‐ Cl‐ nic)2(4, 4’‐bpy)(H2O)2] ⋅ 4H2O}; ; ; ; n (1) and {; ; ; ; [Co(4, 4’‐bpy)(H2O)4] [Co(5‐Br‐ nic)4(H2O)2] ⋅ 4, 4’‐bpy ⋅ 2H2O}; ; ; ; n (2), were prepared under the same experimental conditions. The cobalt(II) ions in 1 are bridged by 4, 4’‐bipyridine ligands into a 1D polymeric chain, each cobalt(II) ion being coordinated with two O‐ monodentate 2‐ chloronicotinate ligands and two water molecules as well, while 2 consists of a complex cation {; ; ; ; [Co(4, 4’‐bpy)(H2O)4]2+}; ; ; ; n, in which cobalt(II) ions are bridged by 4, 4’‐ bipyridine ligands into a 1D polymeric chain, and a complex anion [Co(5‐Br‐ nic)4(H2O)2]2−, in which cobalt(II) ion is coordinated with four 5‐bromonicotinate ligands (two of them being O‐ monodentate and the other two are N‐ monodentate) and two water molecules. DFT calculations revealed a correlation between the halosubstituent (chlorine or bromine) positions in the employed nicotinate ligands and the cobalt(II) coordination environments in the obtained coordination polymers, being responsible for their different structural types.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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