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Ruthenium half-sandwich complexes with tautomerized pyrazolyl-pyridazine ligands: Synthesis, spectroscopic and molecular structural studies by Gajendra Gupta; Kota Thirumala Prasad; Babulal Das; Glenn P.A. Yap; Kollipara Mohan Rao is a Chemistry article available to read on EtoBox.

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Condensation of 1,4-dichloropyridazine with pyrazole, 3,5-dimethylpyrazole and 3-methylpyrazole yielded two types of pyrazolyl-pyridazine ligands, viz., (i) products of substitution on one side of the pyridazine as 3-chloro-6-(pyrazolyl)pyridazine (Cl-L1), 3-chloro-6-(3,5-dimethylpyrazolyl)pyridazine (Cl-L2) and 3-chloro-6-(3-methylpyrazolyl)pyridazine (Cl-L3), and (ii) products of substitution on both sides such as 3,6-bis(pyrazolyl)pyridazine (L1), 3,6-bis(3,5-dimethylpyrazolyl)pyridazine (L2) and tautomers of 3,6-bis(3-methylpyrazolyl)pyridazine (L3). The reactions of g 6 -areneruthenium complexes in methanol with the above mentioned pyrazolyl-pyridazine ligands form mononuclear complexes of the type [(g 6arene)Ru(Cl-L)(Cl)] + and [(g 6 -arene)Ru(L)(Cl)] + ; (arene = benzene and p-cymene; Cl-L = Cl-L1, Cl-L2, Cl-L3; L = L1, L2, L3). All these complexes are characterized by IR, NMR, mass spectrometry and UVvis spectroscopy. The structures of some representative complexes are established by single crystal X-ray diffraction studies.

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Author

Gajendra Gupta; Kota Thirumala Prasad; Babulal Das; Glenn P.A. Yap; Kollipara Mohan Rao

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-328X)

Published

2009

Language

EN

Field

Chemistry (Physical Sciences)