Countercation-directed chiral resolution of [Mo2O4(H2dtpa)]−, syntheses, crystal structures and CD spectra of (λ)-[NEt4][Mo2O4(H2dtpa)] and (δ)-Na[Mo2O4(H2dtpa)]

Fengcai Li; Li Xu

doi:10.1039/C2CE25874A

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Countercation-directed chiral resolution of [Mo₂O₄(H₂dtpa)]⁻, syntheses, crystal structures and CD spectra of (λ)-[NEt₄][Mo₂O₄(H₂dtpa)] and (δ)-Na[Mo₂O₄(H₂dtpa)]†

Fengcai Li^ab and Li Xu*^a

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* Corresponding authors

^a State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, P.R. China
E-mail: xli@fjirsm.ac.cn
Fax: +86 591 83705045
Tel: +86 591 83704943

^b Graduate School of the Chinese Academy of Sciences, Beijing, P.R. China

Abstract

Countercation-directed chiral resolution of (λ, δ)-[Mo₂O₄(H₂dtpa)]⁻ has been successfully achieved by countercation-induced supramolecular enantioselectivity (H₂dtpa³⁻ = diethylenetriamine pentaacetate). (λ)-1 and (δ)-2 crystallize in chiral space group P2₁ and P1 with Flack parameters of 0.00(3) and 0.02(4), respectively. (λ)-[NEt₄][Mo₂O₄(H₂dtpa)] ((λ)-1) and (δ)-Na[Mo₂O₄(H₂dtpa] ((δ)-2) show a pair of enantiomorphic structures related by mirror symmetry. The 1D supramolecular structure of the [NEt₄]⁺ salt (λ)-1 formed by the O⋯H⁺⋯O hydrogen bonds favors λ-[Mo₂O₄(H₂dtpa)]⁻. However, supramolecular interactions of (δ)-2 are dominated by Na–O bonds that allow δ-[Mo₂O₄(H₂dtpa)]⁻ to form a 3D supramolecular porous framework.

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Article information

DOI: https://doi.org/10.1039/C2CE25874A
Article type: Communication
Submitted: 01 Jun 2012
Accepted: 20 Jun 2012
First published: 09 Jul 2012

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CrystEngComm, 2012,14, 5174-5176

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Countercation-directed chiral resolution of [Mo₂O₄(H₂dtpa)]⁻, syntheses, crystal structures and CD spectra of (λ)-[NEt₄][Mo₂O₄(H₂dtpa)] and (δ)-Na[Mo₂O₄(H₂dtpa)]

F. Li and L. Xu, CrystEngComm, 2012, 14, 5174 DOI: 10.1039/C2CE25874A

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