Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/69613
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Type: | Journal article |
Title: | Synthesis and coordination chemistry of 2-(di-2-pyridylamino)pyrimidine; structural aspects of spin crossover in an Fe(II) complex |
Author: | Crees, R. Moubaraki, B. Murray, K. Sumby, C. |
Citation: | Australian Journal of Chemistry: an international journal for chemical science, 2012; 65(7):842-850 |
Publisher: | C S I R O Publishing |
Issue Date: | 2012 |
ISSN: | 0004-9425 |
Statement of Responsibility: | Rachel S. Crees, Boujemma Moubaraki, Keith S. Murray, and Christopher J. Sumby |
Abstract: | 2-(Di-2-pyridylamino)pyrimidine (L), a potentially ditopic tetradentate ligand, was synthesized from commercially available di-2-pyridylamine and 2-chloropyrimidine. Despite being capable of bridging two metal atoms with bidentate chelation of both metal centres, L prefers to chelate or bridge through the more basic pyridyl donors of the di-2-pyridylamine moiety. Mononuclear trans-[Fe(NCS)2(L)2] and [Cu(L)2(H2O)](BF4)2•H2O complexes, and a discrete [Ag2(L)4](PF6)2 metallomacrocycle were isolated and structurally characterized by X-ray crystallography. A mononuclear palladium complex [PdCl2(L)]•(solvate), where solvate = ½H2O or CH2Cl2, was also readily obtained in 71% yield. One example of the ligand acting as a bis(bidentate) bridging ligand was observed in a dinuclear [(PdCl2)2(L)]•¾H2O complex that was obtained only in very low yield (ca. 3%) from the reaction that produced [PdCl2(L)]•½H2O. trans-[Fe(NCS)2(L)2] undergoes a temperature dependent HS-LS (HS = high spin; LS = low spin) crossover at ca. 205 K that was 2 observed by X-ray crystallography and magnetic measurements and attempts were made to understand the structural basis of this process. Despite efforts to isolate examples of L bridging two iron(II) centres, only the mononuclear trans-[Fe(NCS)2(L)2] species could be obtained. |
Description: | This paper was accepted on February 26 2012 |
Rights: | Copyright CSIRO 2012 |
DOI: | 10.1071/CH12045 |
Grant ID: | http://purl.org/au-research/grants/arc/FT0991910 http://purl.org/au-research/grants/arc/LE0989336 |
Published version: | http://dx.doi.org/10.1071/ch12045 |
Appears in Collections: | Aurora harvest 5 Environment Institute publications IPAS publications |
Files in This Item:
File | Description | Size | Format | |
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hdl_69613.pdf | Accepted version | 481.08 kB | Adobe PDF | View/Open |
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