On the Importance of Noncovalent Carbon-Bonding Interactions in the Stabilization of a 1D Co(II) Polymeric Chain as a Precursor of a Novel 2D Coordination Polymer.
A new cobalt(II) coordination polymer 2 with μ1,5 dicyanamide (dca) and a bidentate ligand 3,5-dimethyl-1-(2'-pyridyl)pyrazole (pypz) is prepared in a stepwise manner using the newly synthesized one-dimensional linear Co(II) coordination polymer 1 as a precursor. The structural and thermal characterizations elucidate that the more stable complex 2 shows a two-dimensional layer structural feature. Here, Co(II) atoms with μ1,5 dicyanamido bridges are linked by the ligand pypz forming a macrocyclic chain that runs along the crystallographic 'c' axis having 'sql' (Shubnikov notation) net topology with a 4-connected uninodal node having point symbol {4(4).6(2)}. The remarkable noncovalent carbon-bonding contacts detected in the X-ray structure of compound 1 are analyzed and characterized by density functional theory calculations and the analysis of electron charge density (atoms in molecules).
Department of Chemistry, Jadavpur University , Jadavpur, Kolkata 700032, India.
Pampi
P
Pal
Department of Chemistry, Jadavpur University , Jadavpur, Kolkata 700032, India.
Saugata
S
Konar
Department of Chemistry and Polymer Science, University of Stellenbosch , Stellenbosch 7600, South Africa.
Prem
P
Lama
Department of Chemistry, Chandernagore College , Hooghly 712136, West Bengal, India.
Kinsuk
K
Das
Departament de Química, Universitat de les Illes Balears , Crta. de Valldemossa km 7.5, Palma 07122, Baleares, Spain.
Antonio
A
Bauzá
Departament de Química, Universitat de les Illes Balears , Crta. de Valldemossa km 7.5, Palma 07122, Baleares, Spain.
Antonio
A
Frontera
Department of Chemistry, Jadavpur University , Jadavpur, Kolkata 700032, India.
Subrata
S
Mukhopadhyay