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          Institute: MPI für bioanorganische Chemie     Collection: MPI für bioanorganische Chemie     Display Documents

ID: 681909.0, MPI für bioanorganische Chemie / MPI für bioanorganische Chemie
Metal complex analogues of crown ethers as the preorganized motif to stabilize aquated proton in solid state
Authors:Jana, Arpita; Weyhermüller, Thomas; Mohanta, Sasankasekhar
Date of Publication (YYYY-MM-DD):2013
Title of Journal:CrystEngComm
Journal Abbrev.:Crystengcomm
Issue / Number:20
Start Page:4099
End Page:4106
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The work in this report presents the syntheses, characterization and crystal structures of [{(CuLop)-L-II}(2)(H5O2)](ClO4) (1), [{(CuLhex)-L-II}(2)(H5O2)](ClO4) (2) and [{(CuLen)-L-II}(2)(H5O2)](ClO4) (3) derived from three 3-ethoxysalicylaldehyde-diamine Schiff base compartmental ligands H2Lop, H2Lhex and H2Len, in which the diimine moieties come from ortho-phenylenediamine, trans-1,2-diaminocyclohexane and ethylenediamine, respectively. Compounds 1 and 2 crystallize in triclinic crystal system having P (1) over bar space group, while the crystal system and space group of compound 3 is monoclinic P2(1)/c. In the [{(CuLop/hex/en)-L-II}(2)(H5O2)](+) cation in 1-3, the two OH2 sites of the aquated proton, H5O2+, interact with two O(phenoxo)(2)O(ethoxy)(2) compartments of the two [(CuLop/hex/en)-L-II] moieties by forming bifurcated hydrogen bonds and thus [{(CuLop/hex/en)-L-II}(2)(H5O2)](+) may be considered as a supramolecular dimer of two mononuclear moieties, selfassembled by H5O2+ as the tecton. On the basis of the extent of the difference in the two O-H distances involving the central hydrogen atom, H5O2+ moieties in 1-3 may be considered as H2O+-H center dot center dot center dot OH2 (in 1) or as the resonance hybrid of H2O+-H center dot center dot center dot OH2 and [H2O center dot center dot center dot H center dot center dot center dot OH2](+) (in 2 and 3). A unique aspect in the composition of 1-3 in terms of the interaction of metal complexes with an aquated proton has been discussed.
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für bioanorganische Chemie
External Affiliations:Jana, A.; Mohanta, S.; Univ Calcutta, Dept Chem, Kolkata 700009, India.;
Identifiers:ISI:000318303900013 [ID No:1]
ISSN:1466-8033 [ID No:2]
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