The reaction of benzophenone hydrazone with chlorodiphenylphosphine in the presence of triethylamine affords the monophosphino derivative Ph2C=N-N(H)PPh2(1). The lithiation of 1 with one equivalent of MeLi produces the stable salt Ph2C=N-N(Li)PPh2, and the addition of the second equivalent of MeLi results in the lithiation of the aromatic ring of the Ph2C group followed by the cyclization to lithium-substituted diazaphosphinine. The treatment of the latter with chlorotrimethylsilane furnishes 1,4-diphenyl-2-trimethylsilyl-1,2-dihydrobenzo-[d][1,2,3]diazaphosphinine. Phosphinohydrazone 1 gives 2: 1 complexes with cobalt and nickel bromides, which were characterized by X-ray diffraction. The migratory insertion of the Ph2P group into the N-N bond was not observed in phosphinohydrazone derivatives, as opposed to phosphinohydrazides M-NR-NR-PPh2 (M is metal).

中文翻译：

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金属膦腙配合物

在三乙胺存在下，二苯甲酮腙与氯代二苯基膦反应得到单膦基衍生物 Ph2C=NN(H)PPh2(1)。1 与一当量的 MeLi 锂化产生稳定的盐 Ph2C=NN(Li)PPh2，第二当量的 MeLi 的加入导致 Ph2C 基团的芳环锂化，然后环化为锂取代二氮杂膦。后者用氯三甲基硅烷处理得到1,4-二苯基-2-三甲基甲硅烷基-1,2-二氢苯并-[d][1,2,3]二氮杂膦。膦腙 1 与钴和溴化镍形成 2:1 的配合物，通过 X 射线衍射对其进行表征。在膦腙衍生物中未观察到 Ph2P 基团迁移插入到 NN 键中，