Bidentate phosphines are important ligands in inorganic and organometallic chemistry. However, their electron-donating ability is generally limited by the use of alkyl groups at the phosphorus atoms. Herein, we report two different approaches to strongly electron-donating bidentate phosphines: In the first strategy imidazolin-2-ylidenamino-substituted phosphorus atoms were linked by 1,1′-ferrocene (5) or 1,2-benzene (4) ligand backbones. The second synthetic access is based on linking the imidazolin-2-ylidenamino substituents by an alkyl chain (3). The bidentate phosphines 3–5 were used to synthesize the cationic gold(I) complex [(3)Au][SbF₆], the palladium(II) complex [(3)PdCl₂], as well as the nickel(0) complexes [(4)Ni(η²:η²-cod)] and [(5)₂Ni₂(μ,η²:η²-cod)].

双齿膦是无机和有机金属化学中的重要配体。但是，它们的供电子能力通常受到磷原子上烷基的使用的限制。在本文中，我们报告了两种不同的强电子给体双齿膦膦的方法：在第一种策略中，咪唑啉-2-亚胺基取代的磷原子通过1,1'-二茂铁（5）或1,2-苯（4）配体连接骨干。第二种合成途径是基于通过烷基链（3）连接咪唑啉-2-亚胺基取代基。双齿膦3 – 5用于合成阳离子金（I）络合物[（3）Au] [SbF ₆]中，钯（II）配合物[（3）的PdCl ₂ ]，以及在镍（0）配合物[（4）的Ni（η ²：η ² -cod）]和[（5）₂的Ni ₂（μ ，η ²：η ² -cod）]。