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Coordination driven or/and H-bonded Cu(II)-N,N-dialkylisonicotinamide frameworks |
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| Authors: | Ajay Pal Singh PannuPratibha Kapoor Geeta HundalRamesh Kapoor Martin Martinez-Ripoll |
| Affiliation: | a Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India b Department of Chemistry, Panjab University, Chandigarh 160014, India c Department of Chemistry, Indian Institute of Science Education and Research, Mohali, Chandigarh 160019, India d Instituto de Quimica Fisica, Consejo Superior de Investigaciones Cientificas Rocasolano, Serrano-119, Madrid 28006, Spain e Department of Chemistry, Howard University, Washington, DC 20059, USA |
| Abstract: | Reactions of N,N-diisopropylisonicotinamide (L) with anhydrous CuCl2, CuBr2 and Cu(ClO4)2·6H2O yielded: (a) an ionic product with the molecular composition of [CuL2(H2O)4]·2[CuLCl3] 1; (b) a coordination polymer [CuL2Br2]n2 and (c) a mononuclear complex [CuL4(C3H8O)2]·(ClO4)2] 3, respectively. Similarly, the reaction of N,N-diisobutylisonicotinamide (L′) with Cu(NO3)2·3H2O yielded a coordination polymer [{CuL′2(H2O)2}(NO3)2]n4. 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. |
| Keywords: | N,N-dialkylisonicotinamides X-ray structures Coordination polymers Hydrogen bonding Trinuclear entity Thermal analysis |
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