Hydrogen Activation by an Iridium(III) Complex Bearing a Bidentate Protic NH,NR-NHC鈭hosphine Ligand

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• 作者：Steffen Cepa ; Christian Schulte to Brinke ; Florian Roelfes ; F. Ekkehardt Hahn
• 刊名：Organometallics
• 出版年：2015
• 出版时间：November 23, 2015
• 年：2015
• 卷：34
• 期：22
• 页码：5454-5460
• 全文大小：397K
• ISSN：1520-6041

文摘

Benzimidazole 2 bearing an N1-(biscyclohexylphosphine)ethyl tether cleaves [IrCp*Cl₂]₂ to yield the mononuclear phosphine complex [3]. Heating of [3] yields via a formal C/N tautomerization complex [4]Cl with a protic NHC. Complex [4]Cl can be N3-deprotonated to give its conjugate base [6]. Complex [6] is able to activate molecular hydrogen under mild conditions, leading to complex [5]BF₄. The molecular structures of complexes [3], [4]Cl, [5]Cl, and [5]BF₄ have been determined by X-ray diffraction studies.