Synthesis and structural evaluation of organo-ruthenium complexes with ß-diketonates

Matija Uršič (Author), Tanja Lipec (Author), Anton Meden (Author), Iztok Turel (Author)

Abstract

Four novel ruthenium organometallic complexes: [(η$^6$-p-cymene)Ru(4,4,4-trifluoro-1-(4-bromophenyl)-1,3-butanedione)Cl] (1), [(η$^6$-p-cymene)Ru(4,4,4-trifluoro-1-(4-bromophenyl)-1,3-butanedione)pta]PF$_6$ (2), [(η$^6$-p-cymene)Ru(4,4,4-trifluoro-1-(4-iodophenyl)-1,3-butanedione)Cl] (3) and [(η$^6$-p-cymene)Ru(4,4,4-trifluoro-1-(4-iodophenyl)-1,3-butanedione)pta]PF$_6$ (4) were synthesized and characterized by elemental analysis, infrared (IR), UV-Vis, NMR and mass spectroscopy and single-crystal X-ray diffraction. The crystal structures and spectroscopic data were compared to the previously published complexes [(η$^6$-p-cymene)Ru(4,4,4-trifluoro-1-(4-chloro-phenyl)-1,3-butanedione)Cl] (5) and [(η$^6$-p-cymene)Ru(4,4,4-trifluoro-1-(4-chlorophenyl)-1,3-butanedione)pta]PF$_6$ (6). The pairs of complexes 1 and 3 as well as 2 and 4 are isostructural, with the former crystallizing in triclinic P-1 and the latter in monoclinic P2$_1$/c. The ruthenium(II) ion is found in a pseudo-octahedral “piano-stool” geometry in all compounds. Bond lengths and angles are consistent with other complexes of this type. Complexes 2 and 4 exhibit some moderate dynamic disorder. The lack of hydrogen bonding and major π-π interactions means that most of intramolecular interactions are fairly weak and involve halogen atoms present. This was further confirmed by $^1$H-NMR spectra, where a significant difference is observed only on the ligand near the halogen atom, following an expected trend. The combined data show that the difference in any activity depends substantially on the type of the ligand′s substituted halogen atom.

Keywords

organorutenijevi kompleksi;ß-diketonatni ligandi;halogenski substituenti;1,3,5-triazafosfoadamantan (pta) ligand;nered;organoruthenium complexes;ß-diketonate ligands;halogen substituents;1,3,5-triazaphosphoadamantane (pta) ligand;disorder;

Data

Language:	English
Year of publishing:	2017
Typology:	1.01 - Original Scientific Article
Organization:	UL FKKT - Faculty of Chemistry and Chemical Technology
UDC:	546.96:547-316
COBISS:	1537371075
ISSN:	1420-3049
Views:	157
Downloads:	57
Average score:	0 (0 votes)
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Other data

Secondary language:	Slovenian
Secondary keywords:	organorutenijevi kompleksi;ß-diketonatni ligandi;halogenski substituenti;1;3;5-triazafosfoadamantan (pta) ligand;nered;
Type (COBISS):	Article
Pages:	str. 1-12
Volume:	ǂVol. ǂ22
Issue:	ǂiss. ǂ2
Chronology:	2017
DOI:	10.3390/molecules22020326
ID:	13534216