Novel N-donor heterocyclic ligands and their coordination chemistry towards a Cu(II) salt

  • Two novel bridging-tridentate ligands, 4,6-di-( 4,6-dimethyl-2-pyridylthio) -2-methyl pyrimidine, 1, and 4,6-di-(4,6-dimethyl-2-pyridylamino)-2-methylpyrimidine, 2, have been synthesized and characterized. Both ligands 1 and 2 show an intriguing ability to reduce Cu(II) to Cu(I) ions. The ligand 1 reacts with Cu(O3SCF3)2 to form the Cu-1 complex which can be crystallized from the methanolic solution by adding diethylether: tridinic space group, P 1 (Number 2) with a = 8.234 (6) A, b = 11.224 (8) A, c = 11.748 (6) A, = 96.40 (2)A, = 100.43 (3)A, = 102.70 (2)A, Z=1, R = 0.0427, wR = 0.1155. The Cu-1 complex contains two Cu (1) ions and two units of the ligand 1 in which each Curl) coordinates to 3 N donors oriented into a distorted trigonal planar geometry. Similarly, the ligand 2 reacts with Cu(O3SCF3)2 to form the Cu-2 complex. Spectroscopic and elemental analysis results reveal that Cu-2 has a structure similar to Cu-1. The pi-stacking interaction of the pyrimidine rings may be aTwo novel bridging-tridentate ligands, 4,6-di-( 4,6-dimethyl-2-pyridylthio) -2-methyl pyrimidine, 1, and 4,6-di-(4,6-dimethyl-2-pyridylamino)-2-methylpyrimidine, 2, have been synthesized and characterized. Both ligands 1 and 2 show an intriguing ability to reduce Cu(II) to Cu(I) ions. The ligand 1 reacts with Cu(O3SCF3)2 to form the Cu-1 complex which can be crystallized from the methanolic solution by adding diethylether: tridinic space group, P 1 (Number 2) with a = 8.234 (6) A, b = 11.224 (8) A, c = 11.748 (6) A, = 96.40 (2)A, = 100.43 (3)A, = 102.70 (2)A, Z=1, R = 0.0427, wR = 0.1155. The Cu-1 complex contains two Cu (1) ions and two units of the ligand 1 in which each Curl) coordinates to 3 N donors oriented into a distorted trigonal planar geometry. Similarly, the ligand 2 reacts with Cu(O3SCF3)2 to form the Cu-2 complex. Spectroscopic and elemental analysis results reveal that Cu-2 has a structure similar to Cu-1. The pi-stacking interaction of the pyrimidine rings may be a significant factor to cause structural distortions in both Cu-1 and Cu-2 complexes.show moreshow less

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Metadaten
Author:Thawatchai Tuntulani, Dirk VolkmerORCiDGND, Dieter Fenske, Jean-Marie Lehn
URN:urn:nbn:de:bvb:384-opus4-572981
Frontdoor URLhttps://opus.bibliothek.uni-augsburg.de/opus4/57298
ISSN:1513-1874OPAC
Parent Title (German):Journal of the Science Society of Thailand
Publisher:Science Society of Thailand - Mahidol University
Place of publication:Bangkok
Type:Article
Language:English
Year of first Publication:1997
Publishing Institution:Universität Augsburg
Release Date:2019/07/02
Volume:23
Issue:3
First Page:185
Last Page:198
DOI:https://doi.org/10.2306/scienceasia1513-1874.1997.23.185
Institutes:Mathematisch-Naturwissenschaftlich-Technische Fakultät
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Festkörperchemie
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften
Licence (German):Deutsches Urheberrecht