The new hydrazine 5H-dibenzo[b,f]azepin-5-amine (2) reacts with P- and Si-electrophiles via deprotonation to afford P(III)-, P(V)-, and TMS-hydrazides 3–8 and with carbonyl electrophiles via acid-free condensation to the N-substituted hydrazones 9–12 that are potential N-alkene ligands. While β-ketohydrazone 9 and α-dihydrazone 10 react with [Mes(Cu)]₄, [Cu(NCCCH₃)₄]₂PF₆, and FeCl₂(THF)_1.5 to afford complexes devoid of alkene interaction, [Cu(OTf)]₂·C₆H₆ reacts with the α-keto hydrazone 11 or with N,N dimethyl-hydrazone 12 to form the neutral dimeric Cu(I) complex 18 with bridging Cu(I)–alkene interactions or the tetrahedral cationic complex 19 in which 12 binds as a bidentate hydrazone-alkene ligand, respectively. The surprising stability of the alkene coordination in complexes 18 and 19 prevents substitutions with, e.g., PPh₃.

中文翻译：

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二苯并氮杂肼是 N-烯烃杂化配体的构建模块：Cu、Fe 和 Li 配合物的探索性合成

新的肼 5 H -二苯并[ b , f ]azepin-5-胺 ( 2 )通过去质子化与 P- 和 Si-亲电子试剂反应，得到 P( III )-、P( V )- 和 TMS-酰肼3– 8并与羰基亲电子试剂通过无酸缩合形成N-取代的腙9-12，它们是潜在的N-烯烃配体。虽然 β-酮腙9和 α-二腙10与 [Mes(Cu)] ₄、[Cu(NCCCH ₃ ) ₄ ] ₂ PF ₆和 FeCl ₂ (THF) _1.5反应生成没有烯烃相互作用的络合物，[Cu( OTf)] ₂ ·C ₆ H ₆与α-酮腙11或与N , N二甲基腙12反应，形成具有桥联 Cu( I )-烯烃相互作用或四面体阳离子的中性二聚 Cu( I ) 配合物18配合物19，其中12分别作为二齿腙-烯烃配体结合。配合物18和19中烯烃配位的令人惊讶的稳定性防止被例如PPh ₃取代。