By the interaction of 2-bromo-4,4,5,5-tetramethyl-2-imidazoline-3-oxide-1-oxyl (NN–Br) with tetrakis(triphenylphosphine)palladium(0) a new paramagnetic palladium-organic compound [Pd(NN)(PPh3)2Br] is synthesized. The crystal structure of its tetrahydrofuran solvate is determined by X-ray diffraction. The obtained data allow us to expect that the effective Pd–C bond eclipsing by phenyl rings deactivates the compound in a cross-coupling reaction with aryl halides and provides its high kinetic stability under normal conditions. Magnetochemical studies show the presence of weak antiferromagnetic exchange interactions between spins of paramagnetic [Pd(NN)(PPh3)2Br].

中文翻译：

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钯的结构 - 有机顺磁性

通过 2-bromo-4,4,5,5-tetramethyl-2-imidazoline-3-oxide-1-oxyl (NN-Br) 与四（三苯基膦）钯 (0) 的相互作用，一种新的顺磁性钯-有机化合物[Pd (NN) (PPh3) 2Br] 合成。其四氢呋喃溶剂化物的晶体结构由 X 射线衍射确定。获得的数据使我们能够预期，苯环有效地覆盖 Pd-C 键会使化合物在与芳基卤化物的交叉偶联反应中失活，并在正常条件下提供高动力学稳定性。磁化学研究表明，在顺磁性 [Pd (NN) (PPh3) 2Br] 的自旋之间存在弱的反铁磁交换相互作用。