Journal
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
Volume 649, Issue 5, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/zaac.202200340
Keywords
Thiourea ligands; zinc and cadmium complexes; solid-state structures; hydroboration
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In this study, a series of Zn(II) and Cd(II) metal complexes were synthesized using various unsymmetrical aryl thiourea ligands. The ligands and metal complexes were characterized by H-1, C-13{H-1} NMR and FT-IR analysis. The solid-state structures of the zinc and cadmium metal complexes were determined by single-crystal diffraction analysis. Furthermore, the catalytic activities of the Zn(II) complexes towards the hydroboration of aldehydes and ketones were studied, and excellent yields of the corresponding boronate esters were achieved.
We report a series of Zn(II) and Cd(II) metal complexes [L-2(1)(ZnCl2)] (1), [L-2(1)(ZnBr2)] (2), [L-2(1)(CdCl2)] (3), [L-2(1)(CdI2)] (4), [L-2(2)(ZnCl2)] (5), [L-2(2)(ZnBr2)] (6), [L-2(2)(ZnI2)] (7), [L-2(2)(CdCl2)] (8), [L-2(3)(CdCl2)] (9) and [L-2(4)(ZnBr2)] (10), synthesized using various unsymmetrical aryl thiourea ligands: 1-(2,6-diisopropylphenyl)-3-phenylthiourea (L-1), 1-mesityl-3-phenylthiourea (L-2), 1-(2-fluorophenyl)-3-phenylthiourea (L-3) and symmetrical 1,3-bis(2-fluorophenyl)thiourea (L-4). The ligands and metal complexes were characterized by H-1, C-13{H-1} NMR, FT-IR analysis. Solid-state structures of the zinc and cadmium metal complexes (1-8) were established using the single-crystal diffraction analysis technique. Furthermore, the catalytic activities of the Zn(II) complexes towards hydroboration of aldehydes and ketones (-C=O) as substrates were studied. Excellent yields of the corresponding boronate esters were achieved.
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