Arumuganathan, T. ; Srinivasa Rao, A. ; Das, Samar K. (2008) Non-covalent O···O interactions among isopolyanions using a cis-{MoO2} moiety by the assistance of N-H···O hydrogen bonds Journal of Chemical Sciences, 120 (3). pp. 297-304. ISSN 0253-4134
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Official URL: http://www.ias.ac.in/chemsci/Pdf-May2008/297.pdf
Related URL: http://dx.doi.org/10.1007/s12039-008-0051-y
Abstract
An inorganic-organic hybrid material, [2-AmpH]4[Mo8O26] (1) has been isolated by the reaction of Na2MoO4·2H2O with 2-aminopyrimidine (2-Amp) from an acidic aqueous medium. In this low pH synthesis, the organic molecule (2-Amp) gets mono-protonated (2-AmpH+) and acts as the cation in stabilizing the octamolybdate anion in 1. Compound 1 crystallizes in the triclinic space group P-1 with α = 9·925(3), b = 10·020(3), c = 10·414(3) Å, α = 88·811(4), β = 64·907(4), γ = 89.506(4)°, Z = 1. An interesting three-dimensional supramolecular structure, having well-defined channels, is formed through N-H···O and C-H···O hydrogen bonds, in which the protonated organic cation plays a significant role. The crystal structure also reveals an unusual cluster-cluster (non-covalent O···O) interaction using cis-(MoO2} moieties of the isopolyanion. N-H···O hydrogen bonds, originated from pyridimidinium cation and isopolyanion, are found to influence to attain such non-covalent O···O interactions among polyoxometalate anions. An interesting helical arrangement, formed from isopolyanion and organic cation, is observed.
Item Type: | Article |
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Source: | Copyright of this article belongs to Indian Academy of Sciences. |
Keywords: | Octamolybdate Anion; Low pH Synthesis; Pyrimidinium Cation; Three-dimensional Supramolecular Structure; Non-covalent O···O Interactions; N-H···O and C-H···O Hydrogen Bonds; Helical Feature |
ID Code: | 63464 |
Deposited On: | 29 Sep 2011 04:31 |
Last Modified: | 18 May 2016 12:14 |
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