The N₂ analogue phosphorus nitride (PN) was the first phosphorus-containing compound to be detected in the interstellar medium; however, this thermodynamically unstable compound has a fleeting existence on Earth. Here, we show that reductive coupling of iron(IV) nitride and molybdenum(VI) phosphide complexes assembles PN as a bridging ligand in a structurally characterized bimetallic complex. Reaction with C≡N^tBu releases the mononuclear complex [(N₃N)Mo—PN]⁻, N₃N = [(Me₃SiNCH₂CH₂)₃N]^3–), which undergoes light-induced linkage isomerization to provide [(N₃N)Mo—NP]⁻, as revealed by photocrystallography. While structural and spectroscopic characterization, supported by electronic structure calculations, reveals the PN multiple bond character, coordination to molybdenum induces a nucleophilic character at the terminal atom of the PN/NP ligands. Indeed, the linkage isomers can be trapped in solution by reaction with a Rh(I) electrophile.

中文翻译：

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二氮类似物氮化磷的稳定化

N ₂模拟氮化磷（PN）是星际介质中第一个被检测到的含磷化合物。但是，这种热力学不稳定的化合物在地球上短暂存在。在这里，我们显示出氮化铁（IV）和磷钼（VI）配合物的还原偶联将PN作为桥联配体组装成结构表征的双金属配合物中。与C≡N反应^吨卜释放单核配合物[（N ₃ N）的Mo-PN] ^-，N ₃，N = [（ME ₃ SiNCH ₂ CH ₂）₃ N] ^3- ），其经历光致异构化联动提供[（N ₃N）Mo-NP] ^-，如通过晶体学揭示的。在电子结构计算的支持下，结构和光谱表征揭示了PN的多重键特征，而与钼的配位在PN / NP配体的末端原子处诱导了亲核特征。实际上，可以通过与Rh（I）亲电试剂反应将键合异构体捕获在溶液中。