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π-π stacking generally observed in bis -dipicolinates

Cation intercalation in layered anionic frameworks, Cationic ligands and assembling of complex ions.

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π-π stacking generally observed in bis -dipicolinates

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  1. Cation intercalation in layered anionic frameworks, Cationic ligands and assembling of complex ions We have been interested in in layered structures of dipicolinate complexes constructed by π-π interactions and also to generalize the interlayer separation while encapsulating organo-cations. A series of study carried out whose slides are listed below: π-π stacking generally observed in bis-dipicolinates

  2. Background: We have carried out extensive work on layered structures from anion assemblies of metal dipicolinates to encapsulate organocations [enH2][NiL2].3H2O [penH2][CuL2].5H2O [bamH]2[NiL2].5H2O [enH2][M(en)2(H2O)2].[CuL2]2.H2O [docH2][CuL2].2H2O Packing diagram of the complexes showing the [ML2]2- (ball and stick mode) as inorganic layer and amines (space filled mode) as organic layer. En = ethylenediamine, pen =1,5-pentanediamime , bam = 4-aminobenzylamine, doc = 1,8-diaminodecane Inorg. Chim. Acta 363 (2010) 1479; Inorg. Chem. Commun. 13 (2010) 350

  3. Packing diagram of dipicolnate complexes with alkali metal ions: {[K2(H2O)7][CuL2]}n {[Na(H2O)2]2[CuL2].2H2O}n {Ca(H2O)4][CuL2].2H2O}n [Mg(H2O)5][CuL2].2H2O Inorg. Chim. Acta 363 (2010) 1479

  4. Packing diagram showing intercalation of histidinium and ornithinium cations: (A-B-A manner) [L-hisH2][CuL2].5H2O [L-orniH2][CoL2].9H2O Inter-layer separation generated by amines and amino acid dications : Polyhedron 30 (2011) 22

  5. Mn(II) / Cu(II) dipicolinate with adeninium cations and their supramolecular architectures: ORTEP diagram of [1H, 9H-ade][3H,7H-ade][CuL2].3H2O Adeninium ribbon in layers of complex anion Close view of 1D zigzag adeninium ribbon with H-bond distances Cryst. Growth Des.10 (2010) 3242

  6. Mn(II)-dipicolinate with cytosinium cations and its supramolecular architectures: ORTEP diagram of [1H, 3H-cyt]2 [MnL2(H2O)].2cyt.6H2O Packing diagram of [1H, 3H-cyt]2 [MnL2(H2O)].2cyt.6H2O viewed along a axis Close view of tetrameric hydrogen bonded assembly of cytosine Cryst. Growth Des.10 (2010) 3242

  7. Stabilization of protonated adenine and cytosine cations in polymeric Mn(II) / Cu(II)-quinolinate complex and in flexible polycarboxylic systems: Cytosinium cations in layers of {[1H,3H-cyt]2[CuL2]∙6H2O}n Adeninium cations in layers of {[1H, 9H-ade]2[MnL2].4H2O}n Discrete cytosine-cytosinium assembly in layers of adipic acid Trimeric cytosine-cytosinium assembly in layers of citric acid Inorg. Chem. Commun. 13 (2010) 1244; J. Mol. Struct. 1001 (2011) 134

  8. (c) (a) (b) In the present study we have determined structures of few nickel complexes and demonstrate the stacking of (a) (HQ)2[NiL2].5H2O, (b) (H5AQ)2[NiL2].4H2O, (c) (H8HQ)2[NiL2].6H2O, (d) H2[NiL2].4H2O. ([NiL2]2- in ball and stick mode, in a-c cations are in space filled mode). Where Q = quinoline, 8HQ = 8-hydroxyquinoline, 5AQ = 5-aminoquinoline. This happens as the quinolines have greater tendency for π-stacking interactions. We also establish the solid state cation exchange reactions shown below: (d)

  9. Coordination of cationic sodium cluster [Na4(μ-H2O)6(H2O)10]4+ Cationic sodium cluster [Na4(μ-H2O)6(H2O)10]4+ Coordination by cationic ligands [Ca(H2O)4] 2+ units are bridged by the dipicolinate complex anions [CuL2] dianions are hel by polymeric aqua-bridged potassium cations [CuL2] dianions are held I by polymeric aqua-bridged sodium cations [Mg(H2O)5] units are coordinated to dipicolnate complex

  10. Assembling as well as Scrambling: Multiple cobalt containing cations and anions Combination of copper and cobalt complex ions

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