Syntheses, spectral and structural characterization of ¦Ç⁵- and ¦Ç⁶-cyclic ¦Ð-perimeter hydrocarbon platinum group metal complexes containing pyridazine-NHC analogues

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• 作者：Venkateswara Rao Anna ; Mohan Rao Kollipara ; ^{mohanrao59@gmail.com}
• 关键词：Pyridazine&ndash ; NHC ligands ; Ruthenium ; Rhodium ; Iridium ; Pentamethylcyclopentadienyl
• 刊名：Polyhedron
• 出版年：2012
• 出版时间：28 February, 2012
• 年：2012
• 卷：34
• 期：1
• 页码：176-180
• 全文大小：420 K

文摘

A family of platinum group metal complexes containing bidentate pyridazine-NHC ligands (L1 = 3,6-bis(N-n-methylimidazolyl)pyridazine dichloride, L2 = 3,6-bis(N-n-butylimidazolyl)pyridazine dichloride) have been synthesized. The typical mechanism of the reactions for these syntheses involved an in situ carbene transfer reactions. Reaction of L1/L2 with silver oxide in absence of light yielded silver-NHC complexes (1) and (2). When, the respective metal precursors were added to the silver-NHC complexes, transmetallation occurred with the possible isolation of the following cationic complexes: [(¦Ç⁶-C₆H₆)Ru(L)Cl]²⁺ {L = L1 (3), L2 (5)}, [(¦Ç⁶-p-ⁱPrC₆H₄Me)Ru(L)Cl]²⁺ {L = L1 (4), L2 (6)}, [Cp^{?/sup>Rh(L)Cl]2+ {L = L1 (7), L2 (9)} and [Cp?/sup>Ir(L)Cl]2+ {L = L1 (8), L2 (10)}. All these complexes were stable in ambient atmosphere, and could be obtained in good yield. All these complexes were characterized by spectroscopic analyses. The molecular structure of the complex 9 was determined by single crystal X-ray diffraction studies.}