Synthesis, spectroscopic properties and crystal structure of mononuclear tricarbonylrhenium(I) chloride complexes carrying 6-functionalised quinoxalines |
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| Authors: | Irene Veroni Fernando J Lahoz |
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| Institution: | a Inorganic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Zografou 15771, Greece
b Departamento de Quimica Inorganicas ICMA, Facultad de Ciencias, Universidad de Zaragozas CSIC, 50009 Zaragoza, Spain |
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| Abstract: | Two quinoxaline derivatives pqCH3 and pqCl (where pq stands for 2-(2′-pyridyl)quinoxaline) were prepared by condensation of 2-acetyl pyridyl with 2-amino-4-methylphenylamine or 2-amino-4-chlorophenylamine, correspondingly and were studied spectroscopically and electrochemically, in correlation with the originally reported pq. Their novel corresponded complexes namely, fac-Re(CO)3Cl(L)] (where L = pqCH32 and pqCl 3) were synthesized, characterized, studied and compared to Re(CO)3Clpq, 1. Complex 2 crystallizes in space group C2/c with a = 20.4476(17) Å, b = 15.4521(13) Å, c = 15.2887(13) Å, β = 126.1210(11)°, Z = 8 and V = 3902.0(6) Å3. The substitution of -H by -CH3 or -Cl at 6-position of pq has a minor electronic effect on the pyridyl ring of the ligands, but seems to influence the quinoxaline moiety enough to alter the spectroscopical and electrochemical features. |
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| Keywords: | 2-(2&prime -Pyridyl)quinoxaline Rhenium(I) carbonyl complexes Crystal structure 6-functionalized pyridyl |
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