The Effect of the Spacer of Bis(biurea) Ligands on the Structure of A2L3‐type (A=anion) Phosphate Complexes |
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| Authors: | Prof Biao Wu Dr Shaoguang Li Prof Yibo Lei Prof Huaiming Hu Dr Nader de Sousa Amadeu Prof?Dr Christoph Janiak Dr Jennifer S Mathieson Dr De‐Liang Long Prof Leroy Cronin Prof Xiao‐Juan Yang |
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| Affiliation: | 1. Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710069 (P. R. China);2. State Key Laboratory for Oxo Synthesis & Selective Oxidation, Lanzhou Institute of Chemical Physics, CAS, Lanzhou 730000 (P. R. China);3. Institut für Anorganische Chemie und Strukturchemie, Universit?t Düsseldorf, Universit?tsstrasse 1, 40225, Düsseldorf (Germany);4. WestCHEM, School of Chemistry, University of Glasgow, University Avenue, Glasgow G12 8QQ, Scotland (UK) |
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| Abstract: | By tuning the length and rigidity of the spacer of bis(biurea) ligands L, three structural motifs of the A2L3 complexes (A represents anion, here orthophosphate PO43?), namely helicate, mesocate, and mono‐bridged motif, have been assembled by coordination of the ligand to phosphate anion. Crystal structure analysis indicated that in the three complexes, each of the phosphate ions is coordinated by twelve hydrogen bonds from six surrounding urea groups. The anion coordination properties in solution have also been studied. The results further demonstrate the coordination behavior of phosphate ion, which shows strong tendency for coordination saturation and geometrical preference, thus allowing for the assembly of novel anion coordination‐based structures as in transition‐metal complexes. |
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| Keywords: | anion coordination helicates mesocates oligourea phosphates |
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