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Crucial influence of solvent and chirality - The formation of helices and three-dimensional nets by hydrogen-bonded biimidazolate complexes

Lars Öhrström (Institutionen för oorganisk kemi) ; Krister Larsson (Institutionen för oorganisk kemi) ; Stefan Borg (Institutionen för oorganisk kemi) ; Stefan T. Norberg (Institutionen för oorganisk kemi)
Chemistry-a European Journal (0947-6539). Vol. 7 (2001), 22, p. 4805-4810.
[Artikel, refereegranskad vetenskaplig]

Deprotonation and recrystallisation of racemic [Co(2,2'-biimidazole)(3)]- [NO3](3) by ammonia in water/dimethylformamide solutions gave crystals of [Co(Hbiim)(3)].0.8H(2)O .0.5DMF (2: Hbiim=monoanion of 2,2'-biimidazole, DMF = dimethylformamide), a porous material that contains fourfold interpenetrating (10,3) three-dimensional nets formed by neutral, hydrogen-bonded [Co(Hbiim)(3)] units, with DMF molecules in the narrow channels. Recrystallisation of [Delta -Co(2,2'-biimidazolate)(3)] gave helices instead of the expected (10,3)-a net. These results are discussed in the light of additional density functional theory and molecular mechanics calculations and the X-ray structure of [Co(H(2)biim)(3)][NO3](3).

Nyckelord: Cobalt, Crystal Engineering, Hydrogen Bonds, N Ligands, Supramolecular Chemistry, Metal-organic Frameworks, Crystal Structure, Coordination Polymers, Zeolite Analogs, Network, Design, Magnets

Denna post skapades 2006-08-29. Senast ändrad 2014-11-10.
CPL Pubid: 9913


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