Coordination driven or/and H-bonded Cu(II)–N,N-dialkylisonicotinamide frameworks

• Published in: Polyhedron Vol. 30; no. 10; pp. 1691 - 1702
• Main Authors: Pannu, Ajay Pal Singh, Kapoor, Pratibha, Hundal, Geeta, Kapoor, Ramesh, Martinez-Ripoll, Martin, Butcher, Rayond J., Hundal, Maninder Singh
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 14.06.2011
• Subjects: Coordination polymers; Hydrogen bonding; N,N-dialkylisonicotinamides; Thermal analysis; Trinuclear entity; X-ray structures; Trinuclear entity; Coordination polymers; N,N-dialkylisonicotinamides; Thermal analysis; Hydrogen bonding; X-ray structures
• ISSN: 0277-5387
• DOI: 10.1016/j.poly.2011.03.047

M(II)–N,N-dialkylisonicotinamide complexes self assemble into 1D and 2D networks using H-bonding and coordination polymerization. [Display omitted] ► M(II)–N,N-dialkylisonicotinamide complexes self assemble into 1D and 2D networks. ► N,N-dialkylisonicotinamides act as bidentate bridges to form coordination polymers. ► Increase in dimensionality from 1D to 2D by involving ionic moieties in H-bonding. Reactions of N,N-diisopropylisonicotinamide (L) with anhydrous CuCl 2, CuBr 2 and Cu(ClO 4) 2·6H 2O yielded: (a) an ionic product with the molecular composition of [CuL 2(H 2O) 4]·2[CuLCl 3] 1; (b) a coordination polymer [CuL 2Br 2] n 2 and (c) a mononuclear complex [CuL 4(C 3H 8O) 2]·(ClO 4) 2] 3, respectively. Similarly, the reaction of N,N-diisobutylisonicotinamide (L′) with Cu(NO 3) 2·3H 2O yielded a coordination polymer [{CuL′ 2(H 2O) 2}(NO 3) 2] n 4. The ligands L and L′ coordinate in a monodentate fashion through the pyridine nitrogen atom to the metal centers in complexes 1 and 3. However, complexes 2 and 4 are coordination polymers in which the corresponding ligands (L and L′) act as bridging bidentate between metal centers to form 1D double chains. All the four complexes form networks through coordination polymerization and/or hydrogen bonding.