Issue 45, 2008
From the journal:

Dalton Transactions

First example of a molecular Ce(iii) phosphonate: synthesis, structural characterization and catalytic activity of [Ce2{Ph3CPO2(OEt)}4(NO3)2(H2O)4], structural diversity of Ph3CPO3H2†

Vadapalli Chandrasekhar*a  and  Palani Sasikumara  

* Corresponding authors

a Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, India
E-mail: vc@iitk.ac.in
Fax: +91 (0)512 2590007/2597436
Tel: +91 (0)512 2597259

Abstract

The X-ray structural characterization of tritylphosphonic acid, Ph3CPO3H2 (1), reveals that it possesses three different structural forms (a hexameric cage, a two-dimensional polymeric sheet and a dimer) depending upon the solvent used for crystallization. The reaction of cerium nitrate with 1 under solvothermal conditions afforded a molecular dinuclear Ce(III) phosphonate, [Ce2{Ph3CPO2(OEt)}4(NO3)2(H2O)4] (2). The molecular structure of 2 reveals that the two cerium atoms are held together by two isobidentate phosphonate and nitrate ligands. The cerium atoms are enveloped by a 8 O coordination environment in a distorted dodecahedral geometry. 2 is found to be a good catalyst for the three-component Biginelli reaction.

Graphical abstract: First example of a molecular Ce(iii) phosphonate: synthesis, structural characterization and catalytic activity of [Ce2{Ph3CPO2(OEt)}4(NO3)2(H2O)4], structural diversity of Ph3CPO3H2

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Article information

DOI
https://doi.org/10.1039/B807801G
Article type
Paper
Submitted
08 May 2008
Accepted
02 Sep 2008
First published
10 Nov 2008

Dalton Trans., 2008, 6475-6480

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First example of a molecular Ce(III) phosphonate: synthesis, structural characterization and catalytic activity of [Ce2{Ph3CPO2(OEt)}4(NO3)2(H2O)4], structural diversity of Ph3CPO3H2

V. Chandrasekhar and P. Sasikumar, Dalton Trans., 2008, 6475 DOI: 10.1039/B807801G

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